What is the fire rating of 1/2 inch drywall?
The fire rating for the 1/2-inch drywall used throughout the rest of the home is 30 minutes. As added benefits, Type X absorbs sound slightly better and is slightly stronger than conventional 3/8-inch or 1/2-inch drywall.
How thick is fire rated drywall?
Type X fire rated gypsum drywall that is 5/8 -inch (15.9mm) thick and installed on each side of nominal 2-inch x 4-inch (38x89mm) wood studs spaced 16-inch (400mm) o.c. or 3-5/8 inch (610 mm) steel studs spaced 24” o.c. has a minimum fire rating for the assembly of 1 hour, which is a typical requirement for many …
Can drywall be used as fire barrier?
The gypsum used to make drywall is a naturally occurring mineral composed of calcium sulfate dehydrate and water. The presence of water in gypsum contributes greatly to drywall’s natural fire resistance. Once all the water has escaped the panel, the drywall continues to act as a fire barrier.
What is the fire rating on 5/8 drywall?
1 hour
The 5/8-inch, “fire-code” drywall (called Type X) increases a wall’s fire rating to a minimum of 1 hour, from the 30-minute rating for standard ½-inch drywall. And it’s not just thickness that makes the difference. Type X has a denser core and contains glass fibers that keep it from crumbling in the heat.
What is the fire rating of 5/8 drywall?
Is Type C drywall non combustible?
Type C panels typically have a shrinkage-compensating additive, and when exposed to heat, the Type C gypsum board expands providing more fire-resistance at joints and seams. For other gypsum boards including Type X, although they are all non-combustible, shrinking occurs when exposed to a flame or heat.
How much drywall do I need for a 2 hour fire rating?
Double the number of Type X sheets on the wall for a simple system installed over fire-resistant fiberglass insulation; each sheet of 5/8-inch Type X drywall is rated to resist fire for one hour, so two layers will produce a two-hour firewall. Put two sheets together on one side or use one sheet on each side of a wall.
How much drywall do I need for a 2-hour fire rating?
Do I need fire-rated drywall?
In residential homes, installation of fire rated drywall is often required by state/province and local building codes on interior and exterior walls near furnaces and utility rooms. Fire rated drywall can also be installed in a basement or other places where a wood stove might be used. Click to see full answer
What is a 2 hour fire rated wall?
Two-hour fire ratings. 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. For cored units, the equivalent wall thickness is calculated by multiplying the percent solid by the wall thickness.
Is all drywall fire resistant?
All gypsum based drywall is fire resistant. It will actually slow the progress of a fire because most of the materials of which it is made up are not flammable. In fact, some moisture is always trapped within the gypsum , and the drywall will actually steam when heated to high temperatures.
Is drywall fireproof?
Drywall is relatively fireproof, but manufacturing processes such as adding glass fibers can increase the resistance. Drywall is relatively fire resistant. It’s composed of gypsum pressed between two sheets of thick paper. Gypsum is a soft mineral that by itself is not flammable.