Types Available in The US and Canada
- Regular white board, from 1/4" to 3/4" thickness
- Fire-resistant ("Type X"), different thickness and multiple layers of wallboard provide increased fire rating based on the time a specific wall assembly can withstand a standardized fire test. Often perlite, vermiculite and boric acid are added to improve fire resistance.
- Greenboard, the drywall that contains an oil-based additive in the green colored paper covering that provides moisture resistance. It is commonly used in washrooms and other areas expected to experience elevated levels of humidity.
- Blueboard, blue face paper forms a strong bond with a skim coat or a built-up plaster finish providing both water and mold resistance.
- Cement board, which is more water-resistant than greenboard, for use in showers or sauna rooms, and as a base for ceramic tile
- Soundboard is made from wood fibers to increase the sound rating (STC)
- Soundproof drywall is a laminated drywall made with gypsum, other materials, and damping polymers to significantly increase the STC
- Mold-resistant, paperless drywall
- Enviroboard, a board made from recycled agricultural materials
- Lead-lined drywall, a drywall used around radiological equipment
- Foil-backed drywall to control moisture in a building or room
- Controlled density (CD), also called ceiling board, which is available only in 1/2" thickness and is significantly stiffer than regular white board.
- EcoRock, a drywall which uses a combination of 20 materials including recycled fly ash, slag, kiln dust and fillers and no starch cellulose; it is advertised as being environmentally friendly due to the use of recycled materials and an energy efficient process.
- Gypsum “Firecode C.” This board is similar in composition to Type X, except for more glass fibers and a form of 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.
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