Magnesium oxide wallboard
building material
Magnesium oxide, more commonly called magnesia, is a mineral that when used as part of a cement mixture and cast into thin cement panels under proper curing procedures and practices can be used in residential and commercial building construction. Some versions are suitable for general building uses and for applications that require fire resistance, mold and mildew control, as well as sound-control applications. Magnesia board has strength and resistance due to very strong bonds between magnesium and oxygen atoms that form magnesium oxide crystals (with the chemical formula MgO).
Magnesia boards are used in place of traditional gypsum drywall as wall and ceiling covering material and sheathing. It is also used in other construction applications such as fascias, soffit, shaft-liner and area separation, wall sheathing, and as tile backing (backer board) or as substrates for coatings and insulated systems such as finish systems, exterior insulation finishing systems, and some types of stucco.
Magnesia cement board for building construction is available is various sizes and thickness. It is not a paper-faced material. It generally comes in light gray, white or beige. Grades include smooth face, rough texture, utility and versatile, and there are different densities and strengths for different applications and uses.
Various magnesia cement boards are used in Asia as a primary construction material.
“Magnesium oxide wallboard” enters the record as building material. Crown Archives preserves that source wording while asking what Magnesium, oxide and wallboard can confirm, complicate or overturn.
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“Magnesium oxide wallboard” is worth following because a concise public description often conceals a longer documentary argument. Here, Magnesium, oxide and wallboard provides the most credible route into that argument.
Maps, plans, fabric surveys and administrative records can establish how the site’s name, extent and function changed over time. The source revision retrieved here is dated Dec 6, 2025. The linked authority identifier is Q2063326. None of the 0 selected statements returned an explicit reference.
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This entry incorporates text from “Magnesium oxide wallboard” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.