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What drywall is fire rated?
Type X drywall
Fireproof drywall is the common term; its industry name is Type X drywall. The thickness of this drywall is 5/8-inch, including all layers. Glass fibers are added to the board to help it retard fire. Also, because it is denser than normal gypsum-and-paper drywall, it takes longer for the fire to degrade it.
Does regular drywall have a fire rating?
A standard 1/2′ drywall can offer up to half an hour of fire resistance. It is used in most common areas of the house because it has a lower cost. The real fire rated drywall has to be certified by a third party.
Where is fire rated drywall required Canada?
However, building codes require fire-rated drywall installation in garages and walls that separate the garage from the rest of the house (including ceilings). Additionally, it is also recommended in areas that are more fire-prone like kitchens, utility rooms, and behind furnaces.
Is purple drywall fire rated?
While all drywall is naturally fire-resistant, PURPLE drywall is unique because it also resists moisture, mold and mildew. Some PURPLE drywall products also stand up to scratches, scuffs, dents and sound.
How thick is a 2 hour fire-rated wall?
A 2-hour rating can be achieved by a wall with an equivalent thickness of as little as 3 1/5 inches when expanded slag or pumice is used or 4 1/2 inches when siliceous gravel is used as the aggregate.
Is purple drywall better than Green?
“Green drywall (also known as greenboard) is only moisture-resistant. PURPLE®drywall, only made by National Gypsum, is superior because it offers moisture, mold and mildew resistance. Purple is a color. It is also a color that National Gypsum uses to mark their Mold and Mildew Resistant boards.
When do you need to use fire rated drywall?
For this reason, a fire-rated drywall is sometimes called one-hour fire wallboard. In residences, fire-rated drywall is typically required by building codes to be installed in a few of these places: Garages and especially the garage walls that separate that area from the main house Why Not Use Type X Drywall Everywhere?
What’s the difference between C and X FIRE rated drywall?
The wall systems they are approved for are different, however. Type C fire-rated drywall has more glass fiber reinforcement and other ingredients in the gypsum core that makes its fire-resistive properties superior to Type X.
What kind of drywall is used in fire resistant assemblies?
Type X and type C drywall are designed specifically to be used in fire-rated assemblies. Glass fibers enhance fire resistance. Added to the core of type-X and type-C panels, noncombustible glass fibers help gypsum panels to resist crumbling during a fire.
What kind of drywall does a Building Code require?
When you are installing drywall, often building code dictates certain types of drywall that must be used. One type of drywall that shows up in building codes is what is commonly called fireproof drywall. More accurately, its true name is Type X drywall or fire-rated drywall.