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class="page-heading"> <h1 id="firstHeading" class="firstHeading mw-first-heading">Drywall</h1> <div class="tagline"></div> </div> <ul id="p-associated-pages" class="minerva__tab-container"> <li class="minerva__tab selected"> <a class="minerva__tab-text" href="/wiki/Drywall" rel="" data-event-name="tabs.subject">Article</a> </li> <li class="minerva__tab "> <a class="minerva__tab-text" href="/wiki/Talk:Drywall" rel="discussion" data-event-name="tabs.talk">Talk</a> </li> </ul> <nav class="page-actions-menu"> <ul id="p-views" class="page-actions-menu__list"> <li id="language-selector" class="page-actions-menu__list-item"> <a role="button" href="#p-lang" data-mw="interface" data-event-name="menu.languages" title="Language" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet language-selector"> Language </a> </li> <li id="page-actions-watch" class="page-actions-menu__list-item"> <a role="button" id="ca-watch" href="/w/index.php?title=Special:UserLogin&returnto=Drywall" data-event-name="menu.watch" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet menu__item--page-actions-watch"> Watch </a> </li> <li id="page-actions-edit" class="page-actions-menu__list-item"> <a role="button" id="ca-edit" href="/w/index.php?title=Drywall&action=edit" data-event-name="menu.edit" data-mw="interface" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet edit-page menu__item--page-actions-edit"> Edit </a> </li> </ul> </nav>  <div id="mw-content-subtitle">(Redirected from <a href="/w/index.php?title=Plaster_board&redirect=no" class="mw-redirect" title="Plaster board">Plaster board</a>)</div> </div> <div id="bodyContent" class="content"> <div id="mw-content-text" class="mw-body-content"><script>function mfTempOpenSection(id){var block=document.getElementById("mf-section-"+id);block.className+=" open-block";block.previousSibling.className+=" open-block";}</script><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><section class="mf-section-0" id="mf-section-0"> Drywall (also called plasterboard, dry lining,<a href="#cite_note-1">[1]</a> wallboard, sheet rock, gib board, gypsum board, buster board, turtles board, slap board, custard board, gypsum panel and gyprock) is a panel made of <a href="/wiki/Calcium_sulfate" title="Calcium sulfate">calcium sulfate</a> <a href="/wiki/Hydrate" title="Hydrate">dihydrate</a> (<a href="/wiki/Gypsum" title="Gypsum">gypsum</a>), with or without additives, typically extruded between thick sheets of facer and backer <a href="/wiki/Paper" title="Paper">paper</a>, used in the <a href="/wiki/Construction" title="Construction">construction</a> of interior walls and ceilings.<a href="#cite_note-2">[2]</a> The plaster is mixed with <a href="/wiki/Fiber" title="Fiber">fiber</a> (typically paper, <a href="/wiki/Glass_wool" title="Glass wool">glass wool</a>, or a combination of these materials); <a href="/wiki/Plasticizer" title="Plasticizer">plasticizer</a>, <a href="/wiki/Foaming_agent" title="Foaming agent">foaming agent</a>; and additives that can reduce <a href="/wiki/Mildew" title="Mildew">mildew</a>, <a href="/wiki/Combustibility_and_flammability" title="Combustibility and flammability">flammability</a>, and water absorption. <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Drywall_and_tools.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/f/f5/Drywall_and_tools.jpg/220px-Drywall_and_tools.jpg" decoding="async" width="220" height="159" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/f5/Drywall_and_tools.jpg/330px-Drywall_and_tools.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/f5/Drywall_and_tools.jpg/440px-Drywall_and_tools.jpg 2x" data-file-width="2951" data-file-height="2138"></a><figcaption>Various sized cuts of <style data-mw-deduplicate="TemplateStyles:r1154941027">.mw-parser-output .frac{white-space:nowrap}.mw-parser-output .frac .num,.mw-parser-output .frac .den{font-size:80%;line-height:0;vertical-align:super}.mw-parser-output .frac .den{vertical-align:sub}.mw-parser-output .sr-only{border:0;clip:rect(0,0,0,0);clip-path:polygon(0px 0px,0px 0px,0px 0px);height:1px;margin:-1px;overflow:hidden;padding:0;position:absolute;width:1px}</style>1⁄2 in (13 mm) drywall with tools for maintenance and installation </figcaption></figure> In the mid-20th century, drywall construction became prevalent in North America as a time- and labor-saving alternative to <a href="/wiki/Lath_and_plaster" title="Lath and plaster">lath and plaster</a>.<a href="#cite_note-National_Park_Service:_Preservation_Brief_21:_Repairing_Historic_Flat_Plaster--Walls_and_Ceilings-3">[3]</a> <div id="toc" class="toc" role="navigation" aria-labelledby="mw-toc-heading"><input type="checkbox" role="button" id="toctogglecheckbox" class="toctogglecheckbox" style="display:none"><div class="toctitle" lang="en" dir="ltr"><h2 id="mw-toc-heading">Contents</h2><label class="toctogglelabel" for="toctogglecheckbox"></label></div> <ul> <li class="toclevel-1 tocsection-1"><a href="#History">1 History</a></li> <li class="toclevel-1 tocsection-2"><a href="#Manufacture">2 Manufacture</a></li> <li class="toclevel-1 tocsection-3"><a href="#Specifications">3 Specifications</a> <ul> <li class="toclevel-2 tocsection-4"><a href="#Australia_and_New_Zealand">3.1 Australia and New Zealand</a></li> <li class="toclevel-2 tocsection-5"><a href="#Canada_and_the_United_States">3.2 Canada and the United States</a></li> <li class="toclevel-2 tocsection-6"><a href="#Europe">3.3 Europe</a></li> </ul> </li> <li class="toclevel-1 tocsection-7"><a href="#Construction_techniques">4 Construction techniques</a></li> <li class="toclevel-1 tocsection-8"><a href="#Sound_control">5 Sound control</a></li> <li class="toclevel-1 tocsection-9"><a href="#Water_damage_and_mold">6 Water damage and mold</a></li> <li class="toclevel-1 tocsection-10"><a href="#Other_damage">7 Other damage</a></li> <li class="toclevel-1 tocsection-11"><a href="#High-sulfur_drywall_illness_and_corrosion_issues">8 High-sulfur drywall illness and corrosion issues</a></li> <li class="toclevel-1 tocsection-12"><a href="#Fire_resistance">9 Fire resistance</a> <ul> <li class="toclevel-2 tocsection-13"><a href="#Type_X_drywall">9.1 Type X drywall</a></li> <li class="toclevel-2 tocsection-14"><a href="#Type_C_drywall">9.2 Type C drywall</a></li> </ul> </li> <li class="toclevel-1 tocsection-15"><a href="#North_American_market">10 North American market</a> <ul> <li class="toclevel-2 tocsection-16"><a href="#Types_available_in_Canada_and_the_United_States">10.1 Types available in Canada and the United States</a></li> </ul> </li> <li class="toclevel-1 tocsection-17"><a href="#Waste">11 Waste</a></li> <li class="toclevel-1 tocsection-18"><a href="#See_also">12 See also</a></li> <li class="toclevel-1 tocsection-19"><a href="#References">13 References</a></li> </ul> </div> </section><div class="mw-heading mw-heading2 section-heading" onclick="mfTempOpenSection(1)"><h2 id="History">History</h2> <a role="button" href="/w/index.php?title=Drywall&action=edit&section=1" title="Edit section: History" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div><section class="mf-section-1 collapsible-block" id="mf-section-1"> Sackett Board was invented in 1890 by New York Coal Tar Chemical Company employees Augustine Sackett and Fred L. Kane,<a href="#cite_note-4">[4]</a> graduates of <a href="/wiki/Rensselaer_Polytechnic_Institute" title="Rensselaer Polytechnic Institute">Rensselaer Polytechnic Institute</a>.[<a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed">citation needed</a>]<a href="#cite_note-5">[5]</a> It was made by layering plaster within four plies of wool felt paper. Sheets were <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1154941027">36 by 36 by 1⁄4 inch (914 mm × 914 mm × 6 mm) thick with open (untaped) edges.<a href="#cite_note-gypsum.org-6">[6]</a> Gypsum board evolved between 1910 and 1930, beginning with wrapped board edges and the elimination of the two inner layers of felt paper in favor of paper-based facings. In 1910 <a href="/wiki/USG_Corporation" title="USG Corporation">United States Gypsum Corporation</a> bought Sackett Plaster Board Company and by 1917 introduced Sheetrock.<a href="#cite_note-7">[7]</a> Providing installation efficiency, it was developed additionally as a measure of fire resistance. Later <a href="/wiki/Air_entrainment" title="Air entrainment">air entrainment</a> technology made boards lighter and less brittle, and joint treatment materials and systems also evolved.<a href="#cite_note-gypsum.org-6">[6]</a> Gypsum <a href="/wiki/Lath" title="Lath">lath</a> was an early substrate for plaster. An alternative to traditional wood or metal lath was a panel made up of compressed gypsum plaster board that was sometimes grooved or punched with holes to allow wet plaster to key into its surface. As it evolved, it was faced with paper impregnated with gypsum crystals that bonded with the applied facing layer of plaster.<a href="#cite_note-oldhouseweb.com-8">[8]</a> In 1936, US Gypsum trademarked ROCKLATH<a href="#cite_note-9">[9]</a> for their gypsum lath product.<figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Drywall.jpg" class="mw-file-description"><noscript><img src="//upload.wikimedia.org/wikipedia/commons/thumb/3/3e/Drywall.jpg/220px-Drywall.jpg" decoding="async" width="220" height="181" class="mw-file-element" data-file-width="365" data-file-height="300"></noscript><span class="lazy-image-placeholder" style="width: 220px;height: 181px;" data-src="//upload.wikimedia.org/wikipedia/commons/thumb/3/3e/Drywall.jpg/220px-Drywall.jpg" data-width="220" data-height="181" data-srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/3e/Drywall.jpg/330px-Drywall.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/3/3e/Drywall.jpg 2x" data-class="mw-file-element"> </a><figcaption>Vertically hung drywall with <a href="/wiki/Joint_compound" title="Joint compound">joint compound</a></figcaption></figure> In 2002 the <a href="/wiki/European_Commission" title="European Commission">European Commission</a> imposed fines totaling €420 million on the companies <a href="/wiki/Lafarge_(company)" title="Lafarge (company)">Lafarge</a>, <a href="/wiki/BPB_plc" title="BPB plc">BPB</a>, <a href="/wiki/Knauf" title="Knauf">Knauf</a> and Gyproc Benelux, which had operated a <a href="/wiki/Cartel" title="Cartel">cartel</a> on the market which affected 80% of consumers in <a href="/wiki/France" title="France">France</a>, the UK, <a href="/wiki/Germany" title="Germany">Germany</a> and the <a href="/wiki/Benelux" title="Benelux">Benelux</a> countries. <a href="#cite_note-10">[10]</a> </section><div class="mw-heading mw-heading2 section-heading" onclick="mfTempOpenSection(2)"><h2 id="Manufacture">Manufacture</h2> <a role="button" href="/w/index.php?title=Drywall&action=edit&section=2" title="Edit section: Manufacture" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div><section class="mf-section-2 collapsible-block" id="mf-section-2"> A wallboard panel consists of a layer of <a href="/wiki/Gypsum_plaster" class="mw-redirect" title="Gypsum plaster">gypsum plaster</a> sandwiched between two layers of <a href="/wiki/Paper" title="Paper">paper</a>. The raw <a href="/wiki/Gypsum" title="Gypsum">gypsum</a>, <style data-mw-deduplicate="TemplateStyles:r1123817410">.mw-parser-output .template-chem2-su{display:inline-block;font-size:80%;line-height:1;vertical-align:-0.35em}.mw-parser-output .template-chem2-su>span{display:block;text-align:left}.mw-parser-output sub.template-chem2-sub{font-size:80%;vertical-align:-0.35em}.mw-parser-output sup.template-chem2-sup{font-size:80%;vertical-align:0.65em}</style>CaSO4·2H2O, is heated to drive off the water and then slightly rehydrated to produce the hemihydrate of <a href="/wiki/Calcium_sulfate" title="Calcium sulfate">calcium sulfate</a> (CaSO 4·<style data-mw-deduplicate="TemplateStyles:r1214402035">.mw-parser-output .sfrac{white-space:nowrap}.mw-parser-output .sfrac.tion,.mw-parser-output .sfrac .tion{display:inline-block;vertical-align:-0.5em;font-size:85%;text-align:center}.mw-parser-output .sfrac .num{display:block;line-height:1em;margin:0.0em 0.1em;border-bottom:1px solid}.mw-parser-output .sfrac .den{display:block;line-height:1em;margin:0.1em 0.1em}.mw-parser-output .sr-only{border:0;clip:rect(0,0,0,0);clip-path:polygon(0px 0px,0px 0px,0px 0px);height:1px;margin:-1px;overflow:hidden;padding:0;position:absolute;width:1px}</style>⁠1/2⁠H 2O). The plaster is mixed with fiber (typically paper and/or <a href="/wiki/Glass_fiber" title="Glass fiber">glass fiber</a>), <a href="/wiki/Plasticizer" title="Plasticizer">plasticizer</a>, <a href="/wiki/Foaming_agent" title="Foaming agent">foaming agent</a>, finely ground gypsum crystal as an accelerator, <a href="/wiki/EDTA" class="mw-redirect" title="EDTA">EDTA</a>, <a href="/wiki/Starch" title="Starch">starch</a> or other <a href="/wiki/Chelate" class="mw-redirect" title="Chelate">chelate</a> as a retarder, and various additives that may increase <a href="/wiki/Mildew" title="Mildew">mildew</a> and fire resistance, lower water absorption (<a href="/wiki/Wax_emulsion" title="Wax emulsion">wax emulsion</a> or <a href="/wiki/Silanes" title="Silanes">silanes</a>), reduce creep (tartaric or boric acid).<a href="#cite_note-11">[11]</a> The board is then formed by sandwiching a core of the wet mixture between two sheets of heavy paper or fiberglass mats. When the core sets, it is dried in a large drying chamber, and the sandwich becomes rigid and strong enough for use as a <a href="/wiki/Building_material" title="Building material">building material</a>. Drying chambers typically use <a href="/wiki/Natural_gas" title="Natural gas">natural gas</a> today. To dry 1,000 square feet (93 m2) of wallboard, between 1,750,000 and 2,490,000 BTU (1.85–2.63 GJ) is required. Organic <a href="/wiki/Dispersant" title="Dispersant">dispersants</a> and <a href="/wiki/Plasticizer" title="Plasticizer">plasticizers</a> are used so that the slurry will flow during manufacture and to reduce the water and hence the drying time.<a href="#cite_note-12">[12]</a> <a href="/wiki/Coal-fired_power_station" title="Coal-fired power station">Coal-fired power stations</a> include devices called scrubbers to remove sulfur from their exhaust emissions. The sulfur is absorbed by powdered limestone in a process called <a href="/wiki/Flue-gas_desulfurization" title="Flue-gas desulfurization">flue-gas desulfurization</a> (FGD), which produces several new substances. One is called "FGD gypsum". This is commonly used in drywall construction in the United States and elsewhere.<a href="#cite_note-13">[13]</a><a href="#cite_note-14">[14]</a> In 2020, 8.4 billion square meters of drywall were sold around the world.<a href="#cite_note-15">[15]</a> </section><div class="mw-heading mw-heading2 section-heading" onclick="mfTempOpenSection(3)"><h2 id="Specifications">Specifications</h2> <a role="button" href="/w/index.php?title=Drywall&action=edit&section=3" title="Edit section: Specifications" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div><section class="mf-section-3 collapsible-block" id="mf-section-3"> <div class="mw-heading mw-heading3"><h3 id="Australia_and_New_Zealand">Australia and New Zealand</h3> <a role="button" href="/w/index.php?title=Drywall&action=edit&section=4" title="Edit section: Australia and New Zealand" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div> The term plasterboard is used in <a href="/wiki/Australia" title="Australia">Australia</a> and <a href="/wiki/New_Zealand" title="New Zealand">New Zealand</a>. In Australia, the product is often called Gyprock, the name of the largest plasterboard manufacturer.<a href="#cite_note-16">[16]</a> In New Zealand it is also called Gibraltar and Gib board,<a href="#cite_note-17">[17]</a> genericised from the registered trademark ("GIB") of the locally made product that dominates the local market.<a href="#cite_note-18">[18]</a><a href="#cite_note-19">[19]</a> A specific type of Gibraltar board for use in wet conditions (such as bathrooms and kitchens) is known as AquaGib. It is made in thicknesses of 10 mm, 13 mm, and 16 mm, and sometimes other thicknesses up to 25 mm. Panels are commonly sold in 1200 mm-wide sheets, which may be 1800, 2400, 3000, 4800, or 6000 mm in length. Sheets are usually secured to either timber or cold-formed <a href="/wiki/Steel_frame" title="Steel frame">steel frames</a> anywhere from 150 to 300 mm centres along the beam and 400 to 600 mm across members.<a href="#cite_note-20">[20]</a> In both countries, plasterboard has become a widely used replacement for <a href="/wiki/Scrim_and_sarking" title="Scrim and sarking">scrim and sarking</a> walls in renovating 19th- and early 20th-century buildings.[<a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed">citation needed</a>] <div class="mw-heading mw-heading3"><h3 id="Canada_and_the_United_States">Canada and the United States</h3> <a role="button" href="/w/index.php?title=Drywall&action=edit&section=5" title="Edit section: Canada and the United States" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div> Drywall panels in Canada and the United States are made in widths of 48, 54, and 96 inches (1.2, 1.4, and 2.4 m) and varying lengths to suit the application. The most common width is 48 inches; however, 54-inch-wide panels are becoming more popular as 9-foot (2.7 m) ceiling heights become more common. Lengths up to 16 feet (4.9 m) are common; the most common is 8 feet (2.4 m). Common thicknesses are <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1154941027">1⁄2 and 5⁄8 inch (13 and 16 mm); thicknesses of <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1154941027">1⁄4, 3⁄8, 3⁄4, and 1 inch (6, 10, 19, and 25 mm) are used in specific applications. In many parts of Canada, drywall is commonly referred to as Gyproc. <div class="mw-heading mw-heading3"><h3 id="Europe">Europe</h3> <a role="button" href="/w/index.php?title=Drywall&action=edit&section=6" title="Edit section: Europe" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div> In <a href="/wiki/Europe" title="Europe">Europe</a>, most plasterboard is made in sheets 120 centimetres (47 in) wide; sheets 60 and 90 centimetres (24 and 35 in) wide are also made. Plasterboard 120 centimetres (47 in) wide is most commonly made in 240-centimetre (94 in) lengths; sheets of 250, 260, 270, 280, and 300 centimetres (98, 102, 106, 110, and 118 in) and longer also are common. Thicknesses of plasterboard available are <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1154941027">9.5 to 25 millimetres (3⁄8 to 1 in).<a href="#cite_note-21">[21]</a> Plasterboard is commonly made with one of three edge treatments: tapered edge, where the long edges of the board are tapered with a wide bevel at the front to allow jointing materials to be finished flush with the main board face; plain edge, used where the whole surface will receive a thin coating (skim coat) of finishing plaster; and <a href="/wiki/Bevel" title="Bevel">beveled</a> on all four sides, used in products specialized for roofing. Major UK manufacturers do not offer four-sided <a href="/wiki/Chamfer" title="Chamfer">chamfered</a> drywall for general use. </section><div class="mw-heading mw-heading2 section-heading" onclick="mfTempOpenSection(4)"><h2 id="Construction_techniques">Construction techniques</h2> <a role="button" href="/w/index.php?title=Drywall&action=edit&section=7" title="Edit section: Construction techniques" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div><section class="mf-section-4 collapsible-block" id="mf-section-4"> As an alternative to a week-long plaster application, an entire house can be drywalled in one or two days by two experienced <a href="/wiki/Drywall_mechanic" title="Drywall mechanic">drywallers</a>, and drywall is easy enough to be installed by many amateur home carpenters. In large-scale commercial construction, the work of installing and finishing drywall is often split between drywall mechanics, or hangers, who install the wallboard, and tapers (also known as finishers, mud men, or float crew) who finish the joints and cover the fastener heads with <a href="/wiki/Drywall_compound" class="mw-redirect" title="Drywall compound">drywall compound</a>.<a href="#cite_note-22">[22]</a> Drywall can be finished anywhere from a level 0 to a level 5, where 0 is not finished in any fashion, and five is the most pristine.<a href="#cite_note-23">[23]</a> Depending on how significant the finish is to the customer, the extra steps in the finish may or may not be necessary, though priming and painting of drywall are recommended in any location where it may be exposed to any wear. <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Drywall-screws-v1_(1).png" class="mw-file-description"><noscript><img src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c8/Drywall-screws-v1_%281%29.png/220px-Drywall-screws-v1_%281%29.png" decoding="async" width="220" height="104" class="mw-file-element" data-file-width="816" data-file-height="384"></noscript><span class="lazy-image-placeholder" style="width: 220px;height: 104px;" data-src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c8/Drywall-screws-v1_%281%29.png/220px-Drywall-screws-v1_%281%29.png" data-width="220" data-height="104" data-srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/c8/Drywall-screws-v1_%281%29.png/330px-Drywall-screws-v1_%281%29.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/c8/Drywall-screws-v1_%281%29.png/440px-Drywall-screws-v1_%281%29.png 2x" data-class="mw-file-element"> </a><figcaption>Drywall screws for wood, with parallel-threaded woodscrew shanks and bugle heads</figcaption></figure> Drywall is cut to size by scoring the paper on the finished side (usually white) with a <a href="/wiki/Utility_knife" title="Utility knife">utility knife</a>, breaking the sheet along the cut, and cutting the paper backing. Small features such as holes for outlets and light switches are usually cut using a <a href="/wiki/Keyhole_saw" title="Keyhole saw">keyhole saw</a>, <a href="/wiki/Oscillating_multi-tool" title="Oscillating multi-tool">oscillating multi-tool</a> or a tiny high-speed bit in a rotary tool. Drywall is then fixed to the structure with <a href="/wiki/Nail_(engineering)" class="mw-redirect" title="Nail (engineering)">nails</a> or drywall screws and often glue. Drywall fasteners, also referred to as drywall clips or stops, are gaining popularity in residential and commercial construction. Drywall fasteners are used for supporting interior drywall corners and replacing the non-structural wood or metal <a href="/wiki/Blocking_(construction)" title="Blocking (construction)">blocking</a> that traditionally was used to install drywall. Their function saves material and labor costs, minimizes call-backs due to <a href="/wiki/Truss_uplift" title="Truss uplift">truss uplift</a>, increases <a href="/wiki/Efficient_energy_use" title="Efficient energy use">energy efficiency</a>, and makes plumbing and electrical installation simpler. When driven fully home, drywall screws <a href="/wiki/Countersink" title="Countersink">countersink</a> their heads slightly into the drywall. They use a 'bugle head', a concave taper, rather than the conventional conical countersunk head; this compresses the drywall surface rather than cutting into it and so avoids tearing the paper. Screws for light-gauge <a href="/wiki/Steel_framing" class="mw-redirect" title="Steel framing">steel framing</a> have a sharp point and finely spaced threads. If the steel framing is heavier than 20-<a href="/wiki/Sheet_metal_gauge" class="mw-redirect" title="Sheet metal gauge">gauge</a>, <a href="/wiki/Self-tapping_screw" title="Self-tapping screw">self-drilling screws</a> with finely spaced threads must be used. In some applications, the drywall may be attached to the wall with <a href="/wiki/Adhesive" title="Adhesive">adhesives</a>. <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:FEMA_-_24623_-_Photograph_by_Michelle_Miller-Freeck_taken_on_05-23-2006_in_Mississippi.jpg" class="mw-file-description"><noscript><img src="//upload.wikimedia.org/wikipedia/commons/thumb/9/9e/FEMA_-_24623_-_Photograph_by_Michelle_Miller-Freeck_taken_on_05-23-2006_in_Mississippi.jpg/220px-FEMA_-_24623_-_Photograph_by_Michelle_Miller-Freeck_taken_on_05-23-2006_in_Mississippi.jpg" decoding="async" width="220" height="176" class="mw-file-element" data-file-width="3000" data-file-height="2400"></noscript><span class="lazy-image-placeholder" style="width: 220px;height: 176px;" data-src="//upload.wikimedia.org/wikipedia/commons/thumb/9/9e/FEMA_-_24623_-_Photograph_by_Michelle_Miller-Freeck_taken_on_05-23-2006_in_Mississippi.jpg/220px-FEMA_-_24623_-_Photograph_by_Michelle_Miller-Freeck_taken_on_05-23-2006_in_Mississippi.jpg" data-width="220" data-height="176" data-srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/9e/FEMA_-_24623_-_Photograph_by_Michelle_Miller-Freeck_taken_on_05-23-2006_in_Mississippi.jpg/330px-FEMA_-_24623_-_Photograph_by_Michelle_Miller-Freeck_taken_on_05-23-2006_in_Mississippi.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/9e/FEMA_-_24623_-_Photograph_by_Michelle_Miller-Freeck_taken_on_05-23-2006_in_Mississippi.jpg/440px-FEMA_-_24623_-_Photograph_by_Michelle_Miller-Freeck_taken_on_05-23-2006_in_Mississippi.jpg 2x" data-class="mw-file-element"> </a><figcaption>Applying "joint compound" to drywall</figcaption></figure> After the sheets are secured to the <a href="/wiki/Wall_stud" title="Wall stud">wall studs</a> or ceiling <a href="/wiki/Joist" title="Joist">joists</a>, the installer conceals the seams between drywall sheets with joint tape or fiber mesh. Layers of joint compound, sometimes called mud, are typically spread with a drywall trowel or knife. This compound is also applied to any screw holes or defects. The compound is allowed to air dry and then typically sanded smooth before painting. Alternatively, for a better finish, the entire wall may be given a skim coat, a thin layer (about <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1154941027">1 mm or 1⁄32 in) of finishing compound, to minimize the visual differences between the paper and mudded areas after painting. Another similar skim coating process is called veneer plastering, although it is done slightly thicker (about <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1154941027">2 mm or 3⁄32 in). Veneering uses a slightly different specialized setting compound ("finish plaster") that contains gypsum and lime <a href="/wiki/Putty" title="Putty">putty</a>. This application uses blueboard, which has specially treated paper to accelerate the setting of the gypsum plaster component. This setting has far less shrinkage than the air-dry compounds normally used in drywall, so it only requires one coat. Blueboard also has square edges rather than tapered-edge drywall boards. The tapered drywall boards are used to countersink the tape in taped jointing, whereas the tape in veneer plastering is buried beneath a level surface. One coat veneer plaster over dry board is an intermediate style step between full multi-coat "wet" plaster and the limited joint-treatment-only given "dry" wall. </section><div class="mw-heading mw-heading2 section-heading" onclick="mfTempOpenSection(5)"><h2 id="Sound_control">Sound control</h2> <a role="button" href="/w/index.php?title=Drywall&action=edit&section=8" title="Edit section: Sound control" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div><section class="mf-section-5 collapsible-block" id="mf-section-5"> The method of installation and type of drywall can reduce sound transmission through walls and ceilings. Several builders' books state that thicker drywall reduces sound transmission, but engineering manuals recommend using multiple layers of drywall, sometimes of different thicknesses and glued together, or special types of drywall designed to reduce noise.<a href="#cite_note-24">[24]</a> Also important are the construction details of the framing with steel studs, wider stud spacing, double studding, insulation, and other details reducing sound transmission. <a href="/wiki/Sound_transmission_class" title="Sound transmission class">Sound transmission class</a> (STC) ratings can be increased from 33 for an ordinary stud-wall to as high as 59 with double <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1154941027">1⁄2-inch (13 mm) drywall on both sides of a wood stud wall with resilient channels on one side and <a href="/wiki/Glass_wool" title="Glass wool">glass wool</a> batt insulation between the studs.<a href="#cite_note-25">[25]</a> Sound transmission may be slightly reduced using regular <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1154941027">5⁄8-inch (16 mm) panels (with or without light-gauge resilient metal channels and/or insulation), but it is more effective to use two layers of drywall, sometimes in combination with other factors, or specially designed, sound-resistant drywall.<a href="#cite_note-26">[26]</a> </section><div class="mw-heading mw-heading2 section-heading" onclick="mfTempOpenSection(6)"><h2 id="Water_damage_and_mold">Water damage and mold</h2> <a role="button" href="/w/index.php?title=Drywall&action=edit&section=9" title="Edit section: Water damage and mold" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div><section class="mf-section-6 collapsible-block" id="mf-section-6"> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Drywall_splotch.jpg" class="mw-file-description"><noscript><img src="//upload.wikimedia.org/wikipedia/commons/thumb/5/56/Drywall_splotch.jpg/220px-Drywall_splotch.jpg" decoding="async" width="220" height="165" class="mw-file-element" data-file-width="4000" data-file-height="3000"></noscript><span class="lazy-image-placeholder" style="width: 220px;height: 165px;" data-src="//upload.wikimedia.org/wikipedia/commons/thumb/5/56/Drywall_splotch.jpg/220px-Drywall_splotch.jpg" data-width="220" data-height="165" data-srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/56/Drywall_splotch.jpg/330px-Drywall_splotch.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/56/Drywall_splotch.jpg/440px-Drywall_splotch.jpg 2x" data-class="mw-file-element"> </a><figcaption>Drywall water damage in a closet</figcaption></figure> Drywall is highly vulnerable to moisture due to the inherent properties of the materials that constitute it: gypsum, paper, and organic additives and binders. Gypsum will soften with exposure to moisture and eventually turn into a gooey paste with prolonged immersion, such as during a flood. During such incidents, some, or all, of the drywall in an entire building will need to be removed and replaced. Furthermore, the paper facings and organic additives mixed with the gypsum core are food for mold. The porosity of the board—introduced during manufacturing to reduce the board's weight, lowering construction time and transportation costs—enables water to rapidly reach the core through <a href="/wiki/Capillary_action" title="Capillary action">capillary action</a>, where mold can grow inside. Water that enters a room from overhead may cause ceiling drywall tape to separate from the ceiling as a result of the grooves immediately behind the tape where the drywall pieces meet becoming saturated. The drywall may also soften around the screws holding the drywall in place, and with the aid of gravity, the weight of the water may cause the drywall to sag and eventually collapse, requiring replacement. Drywall's paper facings are edible to termites, which can eat the paper if they infest a wall cavity covered with drywall. This causes the painted surface to crumble to the touch, its paper backing material being eaten. In addition to the necessity of patching the damaged surface and repainting, if enough of the paper has been eaten, the gypsum core can easily crack or crumble without it, and the drywall must be removed and replaced. <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Termites_eating_drywall_paper.jpg" class="mw-file-description"><noscript><img src="//upload.wikimedia.org/wikipedia/commons/thumb/3/3f/Termites_eating_drywall_paper.jpg/220px-Termites_eating_drywall_paper.jpg" decoding="async" width="220" height="165" class="mw-file-element" data-file-width="3264" data-file-height="2448"></noscript><span class="lazy-image-placeholder" style="width: 220px;height: 165px;" data-src="//upload.wikimedia.org/wikipedia/commons/thumb/3/3f/Termites_eating_drywall_paper.jpg/220px-Termites_eating_drywall_paper.jpg" data-width="220" data-height="165" data-srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/3f/Termites_eating_drywall_paper.jpg/330px-Termites_eating_drywall_paper.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/3f/Termites_eating_drywall_paper.jpg/440px-Termites_eating_drywall_paper.jpg 2x" data-class="mw-file-element"> </a><figcaption>Drywall damage caused by termites eating the paper, causing the paint to crumble</figcaption></figure> In many circumstances, especially when the drywall has been exposed to water or moisture for less than 48 hours, professional restoration experts can avoid the cost, inconvenience, and difficulty of removing and replacing the affected drywall. They use rapid drying techniques that eliminate the elements required to support microbial activity while restoring most or all of the drywall. It is for these reasons that greenboard, a type of drywall with an outer face that is wax- and/or chemically coated to resist mold growth,<a href="#cite_note-27">[27]</a> and ideally <a href="/wiki/Cement_board" title="Cement board">cement board</a> are used for rooms expected to have high humidity, primarily kitchens, bathrooms, and laundry rooms. </section><div class="mw-heading mw-heading2 section-heading" onclick="mfTempOpenSection(7)"><h2 id="Other_damage">Other damage</h2> <a role="button" href="/w/index.php?title=Drywall&action=edit&section=10" title="Edit section: Other damage" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div><section class="mf-section-7 collapsible-block" id="mf-section-7"> Foam insulation and the <a href="/wiki/Gypsum" title="Gypsum">gypsum</a> part of sheetrock are easily chewed out by <a href="/wiki/Honeybee" class="mw-redirect" title="Honeybee">honeybees</a> when they are setting up a stray nest in a building, and they want to enlarge their nest area.<a href="#cite_note-28">[28]</a> </section><div class="mw-heading mw-heading2 section-heading" onclick="mfTempOpenSection(8)"><h2 id="High-sulfur_drywall_illness_and_corrosion_issues">High-sulfur drywall illness and corrosion issues</h2> <a role="button" href="/w/index.php?title=Drywall&action=edit&section=11" title="Edit section: High-sulfur drywall illness and corrosion issues" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div><section class="mf-section-8 collapsible-block" id="mf-section-8"> <style data-mw-deduplicate="TemplateStyles:r1236090951">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Chinese_drywall" title="Chinese drywall">Chinese drywall</a></div> A substantial amount of defective drywall was imported into the United States from China and incorporated into tens of thousands of homes during rebuilding in 2006 and 2007 following <a href="/wiki/Hurricane_Katrina" title="Hurricane Katrina">Hurricane Katrina</a> and in other places. Complaints included the structure's foul odour, health effects, and metal corrosion. The emission of sulfurous gases causes this. The same drywall was sold in Asia without problems resulting,[<a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed">citation needed</a>] but US homes are built much more tightly than homes in China, with less ventilation. Volatile sulfur compounds, including <a href="/wiki/Hydrogen_sulfide" title="Hydrogen sulfide">hydrogen sulfide</a>, have been detected as emissions from the imported drywall and may be linked to health problems. These compounds are emitted from many different types of drywall. Several lawsuits are underway in many jurisdictions, but many of the sheets of drywall are simply marked "Made in China", thus making the manufacturer's identification difficult. An investigation by the <a href="/wiki/Consumer_Product_Safety_Commission" class="mw-redirect" title="Consumer Product Safety Commission">Consumer Product Safety Commission</a>, CPSC, was underway in 2009.<a href="#cite_note-29">[29]</a> In November 2009, the CPSC reported a "strong association" between Chinese drywall and corrosion of pipes and wires reported by thousands of homeowners in the United States. The issue was resolved in 2011, and now all drywall must be tested for volatile sulfur, and any containing more than ten ppm is unable to be sold in the US. </section><div class="mw-heading mw-heading2 section-heading" onclick="mfTempOpenSection(9)"><h2 id="Fire_resistance">Fire resistance</h2> <a role="button" href="/w/index.php?title=Drywall&action=edit&section=12" title="Edit section: Fire resistance" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div><section class="mf-section-9 collapsible-block" id="mf-section-9"> <style data-mw-deduplicate="TemplateStyles:r1251242444">.mw-parser-output .ambox{border:1px solid #a2a9b1;border-left:10px solid #36c;background-color:#fbfbfb;box-sizing:border-box}.mw-parser-output .ambox+link+.ambox,.mw-parser-output .ambox+link+style+.ambox,.mw-parser-output .ambox+link+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+style+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+link+.ambox{margin-top:-1px}html body.mediawiki .mw-parser-output .ambox.mbox-small-left{margin:4px 1em 4px 0;overflow:hidden;width:238px;border-collapse:collapse;font-size:88%;line-height:1.25em}.mw-parser-output .ambox-speedy{border-left:10px solid #b32424;background-color:#fee7e6}.mw-parser-output .ambox-delete{border-left:10px solid #b32424}.mw-parser-output .ambox-content{border-left:10px solid #f28500}.mw-parser-output .ambox-style{border-left:10px solid #fc3}.mw-parser-output .ambox-move{border-left:10px solid #9932cc}.mw-parser-output .ambox-protection{border-left:10px solid #a2a9b1}.mw-parser-output .ambox .mbox-text{border:none;padding:0.25em 0.5em;width:100%}.mw-parser-output .ambox .mbox-image{border:none;padding:2px 0 2px 0.5em;text-align:center}.mw-parser-output .ambox .mbox-imageright{border:none;padding:2px 0.5em 2px 0;text-align:center}.mw-parser-output .ambox .mbox-empty-cell{border:none;padding:0;width:1px}.mw-parser-output .ambox .mbox-image-div{width:52px}@media(min-width:720px){.mw-parser-output .ambox{margin:0 10%}}@media print{body.ns-0 .mw-parser-output .ambox{display:none!important}}</style><table class="box-More_citations_needed_section plainlinks metadata ambox ambox-content ambox-Refimprove" role="presentation"><tbody><tr><td class="mbox-text"><div class="mbox-text-span">This section needs additional citations for <a href="/wiki/Wikipedia:Verifiability" title="Wikipedia:Verifiability">verification</a>. Please help <a href="/wiki/Special:EditPage/Drywall" title="Special:EditPage/Drywall">improve this article</a> by <a href="/wiki/Help:Referencing_for_beginners" title="Help:Referencing for beginners">adding citations to reliable sources</a> in this section. Unsourced material may be challenged and removed. (February 2017) (<a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a>)</div></td></tr></tbody></table> Some fire barrier walls are constructed of Type X drywall as a <a href="/wiki/Passive_fire_protection" title="Passive fire protection">passive fire protection</a> item. Gypsum contains the <a href="/wiki/Water_of_crystallization" title="Water of crystallization">water of crystallization</a> bound in the form of <a href="/wiki/Hydrate" title="Hydrate">hydrates</a>. When exposed to <a href="/wiki/Heat" title="Heat">heat</a> or <a href="/wiki/Fire" title="Fire">fire</a>, this water is vaporized, which retards heat transfer until the water in the gypsum is gone. The fire-resistance rating of the fire barrier assembly is increased with additional layers of drywall, up to four hours for walls and three hours for floor/ceiling assemblies.<a href="#cite_note-30">[30]</a> Fire-rated assemblies constructed of drywall are documented in design or <a href="/wiki/Certification_listing" title="Certification listing">certification listing</a> catalogues, including <a href="/wiki/DIN" class="mw-redirect" title="DIN">DIN</a> 4102 Part 4 and the Canadian Building Code, <a href="/wiki/Underwriters_Laboratories" class="mw-redirect" title="Underwriters Laboratories">Underwriters Laboratories</a> and Underwriters Laboratories of Canada (ULC). Tests result in code-recognized designs with assigned fire-resistance ratings. The resulting designs become part of the code and are not limited to use by any manufacturer. However, individual manufacturers may also have proprietary designs that they have had third-party tested and approved, provided that the material used in the field configuration can be demonstrated to meet the minimum requirements of Type X drywall and that sufficient layers and thicknesses are used. <div class="mw-heading mw-heading3"><h3 id="Type_X_drywall">Type X drywall</h3> <a role="button" href="/w/index.php?title=Drywall&action=edit&section=13" title="Edit section: Type X drywall" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div> In the Type X gypsum board, special glass fibers are intermixed with the gypsum to reinforce the core of the panels. These fibers reduce the size of the cracks that form as the water is driven off, thereby extending the length of time the gypsum panels resist fire without failure.<a href="#cite_note-usg.com-31">[31]</a> <div class="mw-heading mw-heading3"><h3 id="Type_C_drywall">Type C drywall</h3> <a role="button" href="/w/index.php?title=Drywall&action=edit&section=14" title="Edit section: Type C drywall" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div> Type C gypsum panels provide stronger fire resistance than Type X. The core of Type C panels contains a higher density of glass fibers. The core of Type C panels also contains vermiculite which acts as a shrinkage-compensating additive that expands when exposed to elevated temperatures of a fire. This expansion occurs at roughly the same temperature as the calcination of the gypsum in the core, allowing the core of the Type C panels to remain dimensionally stable in a fire.<a href="#cite_note-usg.com-31">[31]</a> </section><div class="mw-heading mw-heading2 section-heading" onclick="mfTempOpenSection(10)"><h2 id="North_American_market">North American market</h2> <a role="button" href="/w/index.php?title=Drywall&action=edit&section=15" title="Edit section: North American market" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div><section class="mf-section-10 collapsible-block" id="mf-section-10"> North America is one of the largest gypsum board users in the world, with a total wallboard plant capacity of 42 billion square feet (3.9 billion square metres) per year, roughly half of the worldwide annual production capacity of 85 billion square feet (7.9 billion square metres).<a href="#cite_note-32">[32]</a> Moreover, the homebuilding and remodeling markets in North America in the late 1990s and early 2000s increased demand. The gypsum board market was one of the biggest beneficiaries of the housing boom as "an average new American home contains more than 7.31 metric tons of gypsum."<a href="#cite_note-33">[33]</a> The introduction in March 2005 of the Clean Air Interstate Rule by the <a href="/wiki/United_States_Environmental_Protection_Agency" title="United States Environmental Protection Agency">United States Environmental Protection Agency</a> requires <a href="/wiki/Fossil-fuel_power_plant" class="mw-redirect" title="Fossil-fuel power plant">fossil-fuel power plants</a> to "cut <a href="/wiki/Sulfur_dioxide" title="Sulfur dioxide">sulfur dioxide</a> emissions by 73%" by 2018.<a href="#cite_note-34">[34]</a> The Clean Air Interstate Rule also requested that the power plants install new scrubbers (industrial pollution control devices) to remove sulfur dioxide present in the output waste gas. Scrubbers use the technique of <a href="/wiki/Flue-gas_desulfurization" title="Flue-gas desulfurization">flue-gas desulfurization</a> (FGD), which produces synthetic gypsum as a usable by-product. In response to the new supply of this raw material, the gypsum board market was predicted to shift significantly. However, issues such as mercury release during calcining need to be resolved.<a href="#cite_note-35">[35]</a> <div class="mw-heading mw-heading3"><h3 id="Types_available_in_Canada_and_the_United_States">Types available in Canada and the United States</h3> <a role="button" href="/w/index.php?title=Drywall&action=edit&section=16" title="Edit section: Types available in Canada and the United States" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div> <ul><li>Regular white board, from <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1154941027">1⁄4 to 3⁄4 inch (6.3 to 19 mm) thickness</li> <li>Fire-resistant ("Type X"), different thicknesses and multiple layers of wallboard provide increased fire rating based on the time a specific wall assembly can withstand a standardized fire test. Often <a href="/wiki/Perlite" title="Perlite">perlite</a>, vermiculite, and <a href="/wiki/Boric_acid" title="Boric acid">boric acid</a> are added to improve fire resistance.</li> <li>Greenboard, the drywall containing an oil-based additive in the green-colored paper covering, provides moisture resistance. It is commonly used in washrooms and other areas expected to experience elevated humidity levels.<a href="#cite_note-36">[36]</a></li> <li>Blueboard, blue face paper forms a strong bond with a skim coat or a built-up plaster finish, providing water and mold resistance.</li> <li><a href="/wiki/Cement_board" title="Cement board">Cement board</a>, which is more water-resistant than greenboard, for use in showers or sauna rooms, and as a base for ceramic tile.</li> <li>Soundboard is made from wood fibers to increase the sound transmission class.</li> <li>Soundproof drywall is a laminated drywall made with gypsum and other materials such as damping polymers to significantly increase the <a href="/wiki/Sound_transmission_class" title="Sound transmission class">sound transmission class</a> rating.</li> <li>Mold-resistant, paperless drywall with <a href="/wiki/Fiberglass" title="Fiberglass">fiberglass</a> face<a href="#cite_note-37">[37]</a></li> <li><a href="/wiki/Enviroboard" title="Enviroboard">Enviroboard</a>, a board made from recycled agricultural materials</li> <li>Lead-lined drywall, a drywall used around radiological equipment.<a href="#cite_note-38">[38]</a></li> <li>Foil-backed drywall used as a vapor barrier.<a href="#cite_note-39">[39]</a></li> <li>Controlled density (CD), also called ceiling board, which is available only in <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1154941027">1⁄2 inch (13 mm) thickness and is significantly stiffer than the regular whiteboard.</li> <li>EcoRock, a drywall that uses a combination of 20 materials including recycled fly ash, slag, kiln dust and fillers and no starch cellulose; it is advertised as being <a href="/wiki/Environmentally_friendly" title="Environmentally friendly">environmentally friendly</a> due to the use of recycled materials and an energy efficient process.<a href="#cite_note-40">[40]</a></li> <li>Gypsum "Firecode C". This board is similar in composition to Type X, except for more glass fibres and a form of the vermiculite used to reduce shrinkage. When exposed to high heat, the gypsum core shrinks, but this additive expands at about the same rate, so the gypsum core is more stable in a fire and remains in place even after the gypsum dries up.</li></ul> </section><div class="mw-heading mw-heading2 section-heading" onclick="mfTempOpenSection(11)"><h2 id="Waste">Waste</h2> <a role="button" href="/w/index.php?title=Drywall&action=edit&section=17" title="Edit section: Waste" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div><section class="mf-section-11 collapsible-block" id="mf-section-11"> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Further information: <a href="/wiki/Gypsum_recycling" title="Gypsum recycling">Gypsum recycling</a></div> Because up to 12% of drywall is wasted during the manufacturing and installation processes and the drywall material is frequently not reused, disposal can become a problem. Some landfill sites have banned the dumping of drywall. Some manufacturers take back waste wallboard from construction sites and recycle them into new wallboard. Recycled paper is typically used during manufacturing. More recently, recycling at the construction site itself has been researched. There is potential for using crushed drywall to amend certain soils at building sites, such as <a href="https://en.wiktionary.org/wiki/sodic" class="extiw" title="wikt:sodic">sodic</a> clay and silt mixtures (<a href="/wiki/Bay_mud" title="Bay mud">bay mud</a>), as well as using it in compost.<a href="#cite_note-41">[41]</a> As of 2016, industry standards are being developed to ensure that when and if wallboard is taken back for recycling, quality and composition are maintained. </section><div class="mw-heading mw-heading2 section-heading" onclick="mfTempOpenSection(12)"><h2 id="See_also">See also</h2> <a role="button" href="/w/index.php?title=Drywall&action=edit&section=18" title="Edit section: See also" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div><section class="mf-section-12 collapsible-block" id="mf-section-12"> <style data-mw-deduplicate="TemplateStyles:r1184024115">.mw-parser-output .div-col{margin-top:0.3em;column-width:30em}.mw-parser-output .div-col-small{font-size:90%}.mw-parser-output .div-col-rules{column-rule:1px solid #aaa}.mw-parser-output .div-col dl,.mw-parser-output .div-col ol,.mw-parser-output .div-col ul{margin-top:0}.mw-parser-output .div-col li,.mw-parser-output .div-col dd{page-break-inside:avoid;break-inside:avoid-column}</style><div class="div-col" style="column-width: 22em;"> <ul><li><a href="/wiki/Certification_mark" title="Certification mark">Certification mark</a></li> <li><a href="/wiki/Chinese_drywall" title="Chinese drywall">Chinese drywall</a></li> <li><a href="/wiki/Clay_panel" title="Clay panel">Clay panel</a></li> <li><a href="/wiki/Compartmentalization_(engineering)" title="Compartmentalization (engineering)">Compartmentalization (engineering)</a></li> <li><a href="/wiki/Endothermic_process" title="Endothermic process">Endothermic process</a></li> <li><a href="/wiki/Fire_protection" title="Fire protection">Fire protection</a></li> <li><a href="/wiki/Firewall_(construction)" title="Firewall (construction)">Firewall (construction)</a></li> <li><a href="/wiki/Fermacell" class="mw-redirect" title="Fermacell">Fermacell</a></li> <li><a href="/wiki/Homasote" title="Homasote">Homasote</a></li> <li><a href="/wiki/Knockdown_texture" title="Knockdown texture">Knockdown texture</a></li> <li><a href="/wiki/Magnesium_oxide_wallboard" title="Magnesium oxide wallboard">Magnesium oxide wallboard</a></li> <li><a href="/wiki/Plaster_spraying" title="Plaster spraying">Plaster spraying</a></li> <li><a href="/wiki/Product_certification" title="Product certification">Product certification</a></li></ul></div> </section><div class="mw-heading mw-heading2 section-heading" onclick="mfTempOpenSection(13)"><h2 id="References">References</h2> <a role="button" href="/w/index.php?title=Drywall&action=edit&section=19" title="Edit section: References" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div><section class="mf-section-13 collapsible-block" id="mf-section-13"> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist reflist-columns references-column-width" style="column-width: 30em;"> <ol class="references"> <li id="cite_note-1"><a href="#cite_ref-1">^</a> Go Construct, <a rel="nofollow" class="external text" href="https://www.goconstruct.org/why-choose-construction/whats-happening-in-construction/what-is-dry-lining/">What is Dry Lining?</a>, published 27 September 2021, accessed 3 October 2022 </li> <li id="cite_note-2"><a href="#cite_ref-2">^</a> <style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.merriam-webster.com/dictionary/plasterboard">"Definition of PLASTERBOARD"</a>. www.merriam-webster.com. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20150218024418/http://www.merriam-webster.com/dictionary/plasterboard">Archived</a> from the original on 18 February 2015.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=www.merriam-webster.com&rft.atitle=Definition+of+PLASTERBOARD&rft_id=http%3A%2F%2Fwww.merriam-webster.com%2Fdictionary%2Fplasterboard&rfr_id=info%3Asid%2Fen.wikipedia.org%3ADrywall" class="Z3988"> </li> <li id="cite_note-National_Park_Service:_Preservation_Brief_21:_Repairing_Historic_Flat_Plaster--Walls_and_Ceilings-3"><a href="#cite_ref-National_Park_Service:_Preservation_Brief_21:_Repairing_Historic_Flat_Plaster--Walls_and_Ceilings_3-0">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.nps.go/tps/how-to-preserve/briefs/21-flat-plaster.htm#Historical%20Background">"Preservation Brief 21: Repairing Historic Flat Plaster-Walls and Ceilings"</a>. Nps.gov. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20140428001859/http://www.nps.gov/tps/how-to-preserve/briefs/21-flat-plaster.htm#Historical%20Background">Archived</a> from the original on 28 April 2014. Retrieved 31 May 2014.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Preservation+Brief+21%3A+Repairing+Historic+Flat+Plaster-Walls+and+Ceilings&rft.pub=Nps.gov&rft_id=http%3A%2F%2Fwww.nps.go%2Ftps%2Fhow-to-preserve%2Fbriefs%2F21-flat-plaster.htm%23Historical%2520Background&rfr_id=info%3Asid%2Fen.wikipedia.org%3ADrywall" class="Z3988"> </li> <li id="cite_note-4"><a href="#cite_ref-4">^</a> <a rel="nofollow" class="external text" href="https://www.chicagotribune.com/2003/06/20/new-drywall-resists-mold-mildew/">New drywall resists mold, mildew</a> Chicago Tribune. Access date: 2024-08-22 </li> <li id="cite_note-5"><a href="#cite_ref-5">^</a> <a rel="nofollow" class="external text" href="https://www.invent.org/inductees/augustine-sackett">Augustine Sackett</a> National Inventors Hall of Fame. Access date: 2024-08-22 </li> <li id="cite_note-gypsum.org-6">^ <a href="#cite_ref-gypsum.org_6-0">a</a> <a href="#cite_ref-gypsum.org_6-1">b</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20090708171905/http://www.gypsum.org/mediaguide.html">"History of Gypsum Board"</a>. Gypsum Association. Archived from <a rel="nofollow" class="external text" href="http://www.gypsum.org/mediaguide.html">the original</a> on 8 July 2009. Retrieved 15 July 2009.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Gypsum+Association&rft.atitle=History+of+Gypsum+Board&rft_id=http%3A%2F%2Fwww.gypsum.org%2Fmediaguide.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3ADrywall" class="Z3988"> </li> <li id="cite_note-7"><a href="#cite_ref-7">^</a> Powell, Jane, and Linda Svendsen. Bungalow details: interior. Salt Lake City: Gibbs Smith, 2006. Print. pp.53–54. </li> <li id="cite_note-oldhouseweb.com-8"><a href="#cite_ref-oldhouseweb.com_8-0">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.oldhouseweb.com/how-to-advice/repairing-historic-flat-plaster-walls-and-ceilings-introduction.shtml">"Repairing Historic Flat Plaster Walls and Ceilings By The Old House Web"</a>. Oldhouseweb.com. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20130416002242/http://www.oldhouseweb.com/how-to-advice/repairing-historic-flat-plaster-walls-and-ceilings-introduction.shtml">Archived</a> from the original on 16 April 2013. Retrieved 20 April 2013.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Repairing+Historic+Flat+Plaster+Walls+and+Ceilings+By+The+Old+House+Web&rft.pub=Oldhouseweb.com&rft_id=http%3A%2F%2Fwww.oldhouseweb.com%2Fhow-to-advice%2Frepairing-historic-flat-plaster-walls-and-ceilings-introduction.shtml&rfr_id=info%3Asid%2Fen.wikipedia.org%3ADrywall" class="Z3988"> </li> <li id="cite_note-9"><a href="#cite_ref-9">^</a> <a rel="nofollow" class="external text" href="http://tarr.uspto.gov/servlet/tarr?regser=serial&entry=71376233">ROCKLATH</a> </li> <li id="cite_note-10"><a href="#cite_ref-10">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://europa.eu/rapid/press-release_IP-02-1744_en.htm?locale=en">"European Commission - PRESS RELEASES - Press release - Commission imposes heavy fines on four companies involved in plasterboard cartel"</a>. europa.eu. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20151222155630/http://europa.eu/rapid/press-release_IP-02-1744_en.htm?locale=en">Archived</a> from the original on 22 December 2015. Retrieved 28 March 2016.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=europa.eu&rft.atitle=European+Commission+-+PRESS+RELEASES+-+Press+release+-+Commission+imposes+heavy+fines+on+four+companies+involved+in+plasterboard+cartel&rft_id=http%3A%2F%2Feuropa.eu%2Frapid%2Fpress-release_IP-02-1744_en.htm%3Flocale%3Den&rfr_id=info%3Asid%2Fen.wikipedia.org%3ADrywall" class="Z3988"> </li> <li id="cite_note-11"><a href="#cite_ref-11">^</a> <style data-mw-deduplicate="TemplateStyles:r1041539562">.mw-parser-output .citation{word-wrap:break-word}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}</style><a rel="nofollow" class="external text" href="https://patents.google.com/patent/WO2017092837A1/en">WO2017092837A1</a>, KÖHLER, Juliane & KOHLER, Verena, "Additive for gypsum building materials", issued 2017-06-08<span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Apatent&rft.number=WO2017092837A1&rft.cc=&rft.title=Additive+for+gypsum+building+materials&rft.inventor=K%C3%96HLER&rft.date=2017-06-08"> </li> <li id="cite_note-12"><a href="#cite_ref-12">^</a> Global Gypsum Magazine, January 2009, p. 18 </li> <li id="cite_note-13"><a href="#cite_ref-13">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.caer.uky.edu/kyasheducation/gypsum.shtml">"Gypsum (FGD) Explored - Coal Combustion By-Products (CCBs) - calcium sulfate hydrate, scrubber sludge, FGD gypsum, synthetic gypsum - Kentucky Ash Education Site - UK CAER"</a>. Caer.uky.edu. 12 April 2013. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20130801071022/http://www.caer.uky.edu/kyasheducation/gypsum.shtml">Archived</a> from the original on 1 August 2013. Retrieved 20 April 2013.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Gypsum+%28FGD%29+Explored+-+Coal+Combustion+By-Products+%28CCBs%29+-+calcium+sulfate+hydrate%2C+scrubber+sludge%2C+FGD+gypsum%2C+synthetic+gypsum+-+Kentucky+Ash+Education+Site+-+UK+CAER&rft.pub=Caer.uky.edu&rft.date=2013-04-12&rft_id=http%3A%2F%2Fwww.caer.uky.edu%2Fkyasheducation%2Fgypsum.shtml&rfr_id=info%3Asid%2Fen.wikipedia.org%3ADrywall" class="Z3988"> </li> <li id="cite_note-14"><a href="#cite_ref-14">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20120116185320/http://www.undeerc.org/carrc/html/whatiscoalash.html">"What is Coal Ash?"</a>. Energy & Environmental Research Center. Archived from <a rel="nofollow" class="external text" href="http://www.undeerc.org/carrc/html/whatiscoalash.html">the original</a> on 16 January 2012. Retrieved 6 January 2012.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Energy+%26+Environmental+Research+Center&rft.atitle=What+is+Coal+Ash%3F&rft_id=http%3A%2F%2Fwww.undeerc.org%2Fcarrc%2Fhtml%2Fwhatiscoalash.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3ADrywall" class="Z3988"> </li> <li id="cite_note-15"><a href="#cite_ref-15">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFMathisRathi2022" class="citation news cs1">Mathis, Will; Rathi, Akshat (31 March 2022). <a rel="nofollow" class="external text" href="https://www.bloomberg.com/news/articles/2022-03-31/u-k-startup-launches-drywall-made-from-absorbed-carbon-dioxide">"U.K. Startup Launches Drywall Made From Absorbed Carbon Dioxide"</a>. <a href="/wiki/Bloomberg_News" title="Bloomberg News">Bloomberg News</a>. Retrieved 4 April 2022.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Bloomberg+News&rft.atitle=U.K.+Startup+Launches+Drywall+Made+From+Absorbed+Carbon+Dioxide&rft.date=2022-03-31&rft.aulast=Mathis&rft.aufirst=Will&rft.au=Rathi%2C+Akshat&rft_id=https%3A%2F%2Fwww.bloomberg.com%2Fnews%2Farticles%2F2022-03-31%2Fu-k-startup-launches-drywall-made-from-absorbed-carbon-dioxide&rfr_id=info%3Asid%2Fen.wikipedia.org%3ADrywall" class="Z3988"> </li> <li id="cite_note-16"><a href="#cite_ref-16">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://dpo.com.au/suppliers/gyprock/">"Gyprock"</a>. DPO. Retrieved 4 December 2021.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=DPO&rft.atitle=Gyprock&rft_id=https%3A%2F%2Fdpo.com.au%2Fsuppliers%2Fgyprock%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3ADrywall" class="Z3988"> </li> <li id="cite_note-17"><a href="#cite_ref-17">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFWalrond2010" class="citation web cs1">Walrond, Carl (11 March 2010). <a rel="nofollow" class="external text" href="https://teara.govt.nz/en/building-trades/page-2">"Building trades - Carpenters, joiners, painters, decorators, and plasterers"</a>. Te Ara – the Encyclopedia of New Zealand.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Te+Ara+%E2%80%93+the+Encyclopedia+of+New+Zealand&rft.atitle=Building+trades+-+Carpenters%2C+joiners%2C+painters%2C+decorators%2C+and+plasterers&rft.date=2010-03-11&rft.aulast=Walrond&rft.aufirst=Carl&rft_id=https%3A%2F%2Fteara.govt.nz%2Fen%2Fbuilding-trades%2Fpage-2&rfr_id=info%3Asid%2Fen.wikipedia.org%3ADrywall" class="Z3988"> </li> <li id="cite_note-18"><a href="#cite_ref-18">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFMorrison2018" class="citation web cs1">Morrison, Tina (11 July 2018). <a rel="nofollow" class="external text" href="https://www.nbr.co.nz/article/knauf-takes-fletcher-plasterboard-market-nz-mulls-high-costs-building-bd-148919">"Knauf takes on Fletcher in plasterboard market as NZ mulls high costs of building"</a>. National Business Review (NBR). Retrieved 3 February 2021.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=National+Business+Review+%28NBR%29&rft.atitle=Knauf+takes+on+Fletcher+in+plasterboard+market+as+NZ+mulls+high+costs+of+building&rft.date=2018-07-11&rft.aulast=Morrison&rft.aufirst=Tina&rft_id=https%3A%2F%2Fwww.nbr.co.nz%2Farticle%2Fknauf-takes-fletcher-plasterboard-market-nz-mulls-high-costs-building-bd-148919&rfr_id=info%3Asid%2Fen.wikipedia.org%3ADrywall" class="Z3988"> </li> <li id="cite_note-19"><a href="#cite_ref-19">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://epd-australasia.com/epd/gib-standard-plasterboard/">"GIB Standard Plasterboard"</a>. EPD Australasia. 25 June 2021. Retrieved 4 December 2021.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=EPD+Australasia&rft.atitle=GIB+Standard+Plasterboard&rft.date=2021-06-25&rft_id=https%3A%2F%2Fepd-australasia.com%2Fepd%2Fgib-standard-plasterboard%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3ADrywall" class="Z3988"> </li> <li id="cite_note-20"><a href="#cite_ref-20">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.steelconstruction.info/images/2/23/SCI_P402.pdf">"LIGHT STEEL FRAMING IN RESIDENTIAL CONSTRUCTION"</a> (PDF).</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=LIGHT+STEEL+FRAMING+IN+RESIDENTIAL+CONSTRUCTION&rft_id=https%3A%2F%2Fwww.steelconstruction.info%2Fimages%2F2%2F23%2FSCI_P402.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3ADrywall" class="Z3988"> </li> <li id="cite_note-21"><a href="#cite_ref-21">^</a> Hegger, Manfred. Construction materials manual l. Basel: Birdhouse, 2006. Print. p.60. </li> <li id="cite_note-22"><a href="#cite_ref-22">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.bls.gov/ooh/Construction-and-Extraction/Drywall-and-ceiling-tile-installers-and-tapers.htm#tab-4">"Drywall Installers, Ceiling Tile Installers, and Tapers : Occupational Outlook Handbook: : U.S. Bureau of Labor Statistics"</a>. www.bls.gov. Retrieved 19 May 2023.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=www.bls.gov&rft.atitle=Drywall+Installers%2C+Ceiling+Tile+Installers%2C+and+Tapers+%3A+Occupational+Outlook+Handbook%3A+%3A+U.S.+Bureau+of+Labor+Statistics&rft_id=https%3A%2F%2Fwww.bls.gov%2Fooh%2FConstruction-and-Extraction%2FDrywall-and-ceiling-tile-installers-and-tapers.htm%23tab-4&rfr_id=info%3Asid%2Fen.wikipedia.org%3ADrywall" class="Z3988"> </li> <li id="cite_note-23"><a href="#cite_ref-23">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.usg.com/content/dam/USG_Marketing_Communications/canada/product_promotional_materials/finished_assets/cgc-construction-handbook-ch05-finishing-drywall-systems-can-en.pdf">"Drywall Levels Definition"</a> (PDF).</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Drywall+Levels+Definition&rft_id=https%3A%2F%2Fwww.usg.com%2Fcontent%2Fdam%2FUSG_Marketing_Communications%2Fcanada%2Fproduct_promotional_materials%2Ffinished_assets%2Fcgc-construction-handbook-ch05-finishing-drywall-systems-can-en.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3ADrywall" class="Z3988"> </li> <li id="cite_note-24"><a href="#cite_ref-24">^</a> Ballou, Glen. Handbook for sound engineers. 3rd ed. Boston: Focal, 2002. Print. pp.73–77. </li> <li id="cite_note-25"><a href="#cite_ref-25">^</a> Lindeburg, Michael R. Mechanical engineering reference manual for the pe exam. S.l.: Professional Publications, 2013. Print. Table 73.6 p.73-10. </li> <li id="cite_note-26"><a href="#cite_ref-26">^</a> Ballou, Glen. Handbook for sound engineers. 3rd ed. Boston: Focal, 2002. Print. pp.75–76. </li> <li id="cite_note-27"><a href="#cite_ref-27">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFWallender2022" class="citation web cs1">Wallender, Lee (8 December 2022) [Originally published 5 February 2013]. Bacon, Kelly; Scott, Sarah (eds.). <a rel="nofollow" class="external text" href="http://homerenovations.about.com/od/wallsandtrim/a/artgreenboard.htm">"What is Greenboard Drywall"</a>. Homerenovations.about.com. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20130414105802/http://homerenovations.about.com/od/wallsandtrim/a/artgreenboard.htm">Archived</a> from the original on 14 April 2013. Retrieved 21 May 2023.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=What+is+Greenboard+Drywall&rft.pub=Homerenovations.about.com&rft.date=2022-12-08&rft.aulast=Wallender&rft.aufirst=Lee&rft_id=http%3A%2F%2Fhomerenovations.about.com%2Fod%2Fwallsandtrim%2Fa%2Fartgreenboard.htm&rfr_id=info%3Asid%2Fen.wikipedia.org%3ADrywall" class="Z3988"> </li> <li id="cite_note-28"><a href="#cite_ref-28">^</a> for example, <a rel="nofollow" class="external free" href="https://www.youtube.com/watch?v=dgAzBgO7oCk">https://www.youtube.com/watch?v=dgAzBgO7oCk</a> "Investment Property Bees", around time 3:57 </li> <li id="cite_note-29"><a href="#cite_ref-29">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFWayne2009" class="citation news cs1">Wayne, Leslie (8 October 2009). <a rel="nofollow" class="external text" href="https://www.nytimes.com/2009/10/08/business/08drywall.html">"Thousands of U.S. Homeowners Cite Drywall for Ills"</a>. The New York Times. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20170319180945/http://www.nytimes.com/2009/10/08/business/08drywall.html">Archived</a> from the original on 19 March 2017.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=The+New+York+Times&rft.atitle=Thousands+of+U.S.+Homeowners+Cite+Drywall+for+Ills&rft.date=2009-10-08&rft.aulast=Wayne&rft.aufirst=Leslie&rft_id=https%3A%2F%2Fwww.nytimes.com%2F2009%2F10%2F08%2Fbusiness%2F08drywall.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3ADrywall" class="Z3988"> article by Leslie Wayne in <a href="/wiki/The_New_York_Times" title="The New York Times">The New York Times</a> 7 October 2009 </li> <li id="cite_note-30"><a href="#cite_ref-30">^</a> USG Corporation. The gypsum construction handbook. 7th ed. Kingston, MA: R. S. Means, 2014. Print. </li> <li id="cite_note-usg.com-31">^ <a href="#cite_ref-usg.com_31-0">a</a> <a href="#cite_ref-usg.com_31-1">b</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.usg.com/content/dam/USG_Marketing_Communications/canada/product_promotional_materials/finished_assets/cgc-TypeX-TypeC-white-paper-en-can-EWB2605.pdf">"Type X vs. Type C – Not all gypsum boards are created equal!"</a> (PDF). <a rel="nofollow" class="external text" href="https://web.archive.org/web/20161222112535/https://www.usg.com/content/dam/USG_Marketing_Communications/united_states/product_promotional_materials/finished_assets/type-x-and-type-c-white-paper-en-usa-WB2605.pdf">Archived</a> (PDF) from the original on 22 December 2016. Retrieved 20 December 2016.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Type+X+vs.+Type+C+%E2%80%93+Not+all+gypsum+boards+are+created+equal%21&rft_id=https%3A%2F%2Fwww.usg.com%2Fcontent%2Fdam%2FUSG_Marketing_Communications%2Fcanada%2Fproduct_promotional_materials%2Ffinished_assets%2Fcgc-TypeX-TypeC-white-paper-en-can-EWB2605.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3ADrywall" class="Z3988"> </li> <li id="cite_note-32"><a href="#cite_ref-32">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://minerals.usgs.gov/minerals/pubs/commodity/gypsum/gypsumcs06.pdf">"Mineral Commodity Summaries, January 2006"</a> (PDF). <a rel="nofollow" class="external text" href="https://web.archive.org/web/20130316053527/http://minerals.usgs.gov/minerals/pubs/commodity/gypsum/gypsumcs06.pdf">Archived</a> (PDF) from the original on 16 March 2013. Retrieved 20 April 2013.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Mineral+Commodity+Summaries%2C+January+2006&rft_id=http%3A%2F%2Fminerals.usgs.gov%2Fminerals%2Fpubs%2Fcommodity%2Fgypsum%2Fgypsumcs06.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3ADrywall" class="Z3988"> </li> <li id="cite_note-33"><a href="#cite_ref-33">^</a> <a rel="nofollow" class="external text" href="https://minerals.usgs.gov/minerals/pubs/commodity/gypsum/gypsmyb01.pdf">Donald W. Olson (2002) Gypsum</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20060614220512/http://minerals.usgs.gov/minerals/pubs/commodity/gypsum/gypsmyb01.pdf">Archived</a> 14 June 2006 at the <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a> History and production </li> <li id="cite_note-34"><a href="#cite_ref-34">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20130412234001/http://www.epa.gov/cair/">"Clean Air Interstate Rule"</a>. Epa.gov. Archived from <a rel="nofollow" class="external text" href="http://www.epa.gov/cair/">the original</a> on 12 April 2013. Retrieved 20 April 2013.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Clean+Air+Interstate+Rule&rft.pub=Epa.gov&rft_id=http%3A%2F%2Fwww.epa.gov%2Fcair%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3ADrywall" class="Z3988"> </li> <li id="cite_note-35"><a href="#cite_ref-35">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.flyash.info/2003/75heeb.pdf">"Mercury Release from FGD Gypsum"</a> (PDF). <a rel="nofollow" class="external text" href="https://web.archive.org/web/20120903214141/http://www.flyash.info/2003/75heeb.pdf">Archived</a> (PDF) from the original on 3 September 2012. Retrieved 20 April 2013.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Mercury+Release+from+FGD+Gypsum&rft_id=http%3A%2F%2Fwww.flyash.info%2F2003%2F75heeb.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3ADrywall" class="Z3988"> </li> <li id="cite_note-36"><a href="#cite_ref-36">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.saint-gobaingyproc.in/plasterboard-gyproc-moisture-resistant.html">"Plasterboard | Gyproc Moisture Resistant | Saint-Gobain Gyproc Products"</a>. Saint-gobaingyproc.in. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20110529075433/http://www.saint-gobaingyproc.in/plasterboard-gyproc-moisture-resistant.html">Archived</a> from the original on 29 May 2011. Retrieved 20 April 2013.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Plasterboard+%26%23124%3B+Gyproc+Moisture+Resistant+%26%23124%3B+Saint-Gobain+Gyproc+Products&rft.pub=Saint-gobaingyproc.in&rft_id=http%3A%2F%2Fwww.saint-gobaingyproc.in%2Fplasterboard-gyproc-moisture-resistant.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3ADrywall" class="Z3988"> </li> <li id="cite_note-37"><a href="#cite_ref-37">^</a> Ferguson, Myron R.. Drywall: professional techniques for great results. Rev. and updated. ed. Newtown, CT: Taunton Press, 2002. Print. p.11. </li> <li id="cite_note-38"><a href="#cite_ref-38">^</a> X-ray shielding. Washington, D.C.: Headquarters, Dept. of the Army, 1966. Print. p.12. </li> <li id="cite_note-39"><a href="#cite_ref-39">^</a> Ferguson, Myron R.. Drywall: professional techniques for great results. Rev. and updated. ed. Newtown, CT: Taunton Press, 2002. Print. p.15. </li> <li id="cite_note-40"><a href="#cite_ref-40">^</a> <a rel="nofollow" class="external text" href="http://www.popsci.com/bown/2008/product/serious-materials-ecorock">Serious Materials EcoRock</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20121005014803/http://www.popsci.com/bown/2008/product/serious-materials-ecorock">Archived</a> 5 October 2012 at the <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a>. Popular Science. </li> <li id="cite_note-41"><a href="#cite_ref-41">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20091120210118/http://www.ciwmb.ca.gov/Markets/StatusRpts/Inerts.htm">"Recycled Inerts"</a>. Archived from <a rel="nofollow" class="external text" href="http://www.ciwmb.ca.gov/Markets/StatusRpts/Inerts.htm">the original</a> on 20 November 2009. Retrieved 20 April 2013.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Recycled+Inerts&rft_id=http%3A%2F%2Fwww.ciwmb.ca.gov%2FMarkets%2FStatusRpts%2FInerts.htm&rfr_id=info%3Asid%2Fen.wikipedia.org%3ADrywall" class="Z3988"> </li> </ol></div>    </section></div> <noscript><img src="https://login.m.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1&mobile=1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=Drywall&oldid=1252659987">https://en.wikipedia.org/w/index.php?title=Drywall&oldid=1252659987</a>"</div></div> </div> <div class="post-content" id="page-secondary-actions"> </div> </main> <footer class="mw-footer minerva-footer" role="contentinfo"> <a class="last-modified-bar" href="/w/index.php?title=Drywall&action=history"> <div class="post-content last-modified-bar__content"> Last edited on 22 October 2024, at 11:30 </div> </a> <div class="post-content footer-content"> <div id='mw-data-after-content'> <div class="read-more-container"></div> </div> <div id="p-lang"> <h4>Languages</h4> <section> <ul id="p-variants" class="minerva-languages"></ul> <ul class="minerva-languages"><li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Gipsbord" title="Gipsbord – Afrikaans" lang="af" hreflang="af" data-title="Gipsbord" data-language-autonym="Afrikaans" data-language-local-name="Afrikaans" class="interlanguage-link-target">Afrikaans</a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%A7%D9%84%D8%AC%D8%A8%D8%B3" title="الجبس – Arabic" lang="ar" hreflang="ar" data-title="الجبس" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target">العربية</a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%93%D1%96%D0%BF%D1%81%D0%B0%D0%BA%D0%B0%D1%80%D0%B4%D0%BE%D0%BD" title="Гіпсакардон – Belarusian" lang="be" hreflang="be" data-title="Гіпсакардон" data-language-autonym="Беларуская" data-language-local-name="Belarusian" class="interlanguage-link-target">Беларуская</a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%93%D0%B8%D0%BF%D1%81%D0%BE%D0%BA%D0%B0%D1%80%D1%82%D0%BE%D0%BD" title="Гипсокартон – Bulgarian" lang="bg" hreflang="bg" data-title="Гипсокартон" data-language-autonym="Български" data-language-local-name="Bulgarian" class="interlanguage-link-target">Български</a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Placa_de_guix_laminat" title="Placa de guix laminat – Catalan" lang="ca" hreflang="ca" data-title="Placa de guix laminat" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target">Català</a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/S%C3%A1drokarton" title="Sádrokarton – Czech" lang="cs" hreflang="cs" data-title="Sádrokarton" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target">Čeština</a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Gipskarton" title="Gipskarton – German" lang="de" hreflang="de" data-title="Gipskarton" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target">Deutsch</a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Kipsplaat" title="Kipsplaat – Estonian" lang="et" hreflang="et" data-title="Kipsplaat" data-language-autonym="Eesti" data-language-local-name="Estonian" class="interlanguage-link-target">Eesti</a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%93%CF%85%CF%88%CE%BF%CF%83%CE%B1%CE%BD%CE%AF%CE%B4%CE%B1" title="Γυψοσανίδα – Greek" lang="el" hreflang="el" data-title="Γυψοσανίδα" data-language-autonym="Ελληνικά" data-language-local-name="Greek" class="interlanguage-link-target">Ελληνικά</a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Cart%C3%B3n_yeso" title="Cartón yeso – Spanish" lang="es" hreflang="es" data-title="Cartón yeso" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target">Español</a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Gipsoplato" title="Gipsoplato – Esperanto" lang="eo" hreflang="eo" data-title="Gipsoplato" data-language-autonym="Esperanto" data-language-local-name="Esperanto" class="interlanguage-link-target">Esperanto</a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%AF%DB%8C%D9%88%D8%A7%D8%B1_%D8%AE%D8%B4%DA%A9" title="دیوار خشک – Persian" lang="fa" hreflang="fa" data-title="دیوار خشک" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target">فارسی</a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Plaque_de_pl%C3%A2tre" title="Plaque de plâtre – French" lang="fr" hreflang="fr" data-title="Plaque de plâtre" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target">Français</a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EA%B1%B4%EC%8B%9D%EB%B2%BD" title="건식벽 – Korean" lang="ko" hreflang="ko" data-title="건식벽" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target">한국어</a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Gips-kartonske_plo%C4%8De" title="Gips-kartonske ploče – Croatian" lang="hr" hreflang="hr" data-title="Gips-kartonske ploče" data-language-autonym="Hrvatski" data-language-local-name="Croatian" class="interlanguage-link-target">Hrvatski</a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Cartongesso" title="Cartongesso – Italian" lang="it" hreflang="it" data-title="Cartongesso" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target">Italiano</a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%91%D7%A0%D7%99%D7%99%D7%94_%D7%91%D7%92%D7%91%D7%A1" title="בנייה בגבס – Hebrew" lang="he" hreflang="he" data-title="בנייה בגבס" data-language-autonym="עברית" data-language-local-name="Hebrew" class="interlanguage-link-target">עברית</a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%97%E1%83%90%E1%83%91%E1%83%90%E1%83%A8%E1%83%98%E1%83%A0-%E1%83%9B%E1%83%A3%E1%83%A7%E1%83%90%E1%83%9D" title="თაბაშირ-მუყაო – Georgian" lang="ka" hreflang="ka" data-title="თაბაშირ-მუყაო" data-language-autonym="ქართული" data-language-local-name="Georgian" class="interlanguage-link-target">ქართული</a></li><li class="interlanguage-link interwiki-ku mw-list-item"><a href="https://ku.wikipedia.org/wiki/Cils%C3%AApahn" title="Cilsêpahn – Kurdish" lang="ku" hreflang="ku" data-title="Cilsêpahn" data-language-autonym="Kurdî" data-language-local-name="Kurdish" class="interlanguage-link-target">Kurdî</a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/%C4%A2ip%C5%A1kartons" title="Ģipškartons – Latvian" lang="lv" hreflang="lv" data-title="Ģipškartons" data-language-autonym="Latviešu" data-language-local-name="Latvian" class="interlanguage-link-target">Latviešu</a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Gipszkarton" title="Gipszkarton – Hungarian" lang="hu" hreflang="hu" data-title="Gipszkarton" data-language-autonym="Magyar" data-language-local-name="Hungarian" class="interlanguage-link-target">Magyar</a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Gipsplaat" title="Gipsplaat – Dutch" lang="nl" hreflang="nl" data-title="Gipsplaat" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target">Nederlands</a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E7%9F%B3%E8%86%8F%E3%83%9C%E3%83%BC%E3%83%89" title="石膏ボード – Japanese" lang="ja" hreflang="ja" data-title="石膏ボード" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target">日本語</a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Gipsplate" title="Gipsplate – Norwegian Bokmål" lang="nb" hreflang="nb" data-title="Gipsplate" data-language-autonym="Norsk bokmål" data-language-local-name="Norwegian Bokmål" class="interlanguage-link-target">Norsk bokmål</a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Gipsplate" title="Gipsplate – Norwegian Nynorsk" lang="nn" hreflang="nn" data-title="Gipsplate" data-language-autonym="Norsk nynorsk" data-language-local-name="Norwegian Nynorsk" class="interlanguage-link-target">Norsk nynorsk</a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Gipsokarton_shiftlar" title="Gipsokarton shiftlar – Uzbek" lang="uz" hreflang="uz" data-title="Gipsokarton shiftlar" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="Uzbek" class="interlanguage-link-target">Oʻzbekcha / ўзбекча</a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/P%C5%82yta_gipsowo-kartonowa" title="Płyta gipsowo-kartonowa – Polish" lang="pl" hreflang="pl" data-title="Płyta gipsowo-kartonowa" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target">Polski</a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Placa_de_gesso" title="Placa de gesso – Portuguese" lang="pt" hreflang="pt" data-title="Placa de gesso" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target">Português</a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%93%D0%B8%D0%BF%D1%81%D0%BE%D0%BA%D0%B0%D1%80%D1%82%D0%BE%D0%BD" title="Гипсокартон – Russian" lang="ru" hreflang="ru" data-title="Гипсокартон" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target">Русский</a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Drywall" title="Drywall – Simple English" lang="en-simple" hreflang="en-simple" data-title="Drywall" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target">Simple English</a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Kipsilevy" title="Kipsilevy – Finnish" lang="fi" hreflang="fi" data-title="Kipsilevy" data-language-autonym="Suomi" data-language-local-name="Finnish" class="interlanguage-link-target">Suomi</a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Gipsskiva" title="Gipsskiva – Swedish" lang="sv" hreflang="sv" data-title="Gipsskiva" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target">Svenska</a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%9A%E0%AE%BF%E0%AE%AA%E0%AF%8D%E0%AE%9A%E0%AE%AE%E0%AF%8D_%E0%AE%AA%E0%AE%B2%E0%AE%95%E0%AF%88" title="சிப்சம் பலகை – Tamil" lang="ta" hreflang="ta" data-title="சிப்சம் பலகை" data-language-autonym="தமிழ்" data-language-local-name="Tamil" class="interlanguage-link-target">தமிழ்</a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Al%C3%A7%C4%B1pan" title="Alçıpan – Turkish" lang="tr" hreflang="tr" data-title="Alçıpan" data-language-autonym="Türkçe" data-language-local-name="Turkish" class="interlanguage-link-target">Türkçe</a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%93%D1%96%D0%BF%D1%81%D0%BE%D0%BA%D0%B0%D1%80%D1%82%D0%BE%D0%BD" title="Гіпсокартон – Ukrainian" lang="uk" hreflang="uk" data-title="Гіпсокартон" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target">Українська</a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/T%E1%BA%A5m_th%E1%BA%A1ch_cao" title="Tấm thạch cao – Vietnamese" lang="vi" hreflang="vi" data-title="Tấm thạch cao" data-language-autonym="Tiếng Việt" data-language-local-name="Vietnamese" class="interlanguage-link-target">Tiếng Việt</a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E4%B9%BE%E5%A3%81" title="乾壁 – Chinese" lang="zh" hreflang="zh" data-title="乾壁" data-language-autonym="中文" data-language-local-name="Chinese" class="interlanguage-link-target">中文</a></li></ul> </section> </div> <div class="minerva-footer-logo"><img src="/static/images/mobile/copyright/wikipedia-wordmark-en.svg" alt="Wikipedia" width="120" height="18" style="width: 7.5em; height: 1.125em;"/> </div> <ul id="footer-info" class="footer-info hlist hlist-separated"> <li id="footer-info-lastmod"> This page was 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