Is gypsum board fire resistant?
When gypsum drywall is exposed to fire, the water is slowly released as steam, effectively slowing heat transmission. Fire-rated gypsum drywall is more fire-resistant because it contains glass fiber reinforcement and other additives within its specially formulated gypsum core to help it hold up longer to fire exposure.
Are all 5/8 gypsum boards fire rated?
Type X drywall has special core additives that allow it to be used in fire rated designs and usually comes in 5/8” thickness. Type X drywall products will have a UL/ULC Marking printed on the back of each board identifying it as a fire-resistance rated board.
What type of gypsum board is most commonly used for fire rated partitions?
Type X drywall board
Type X drywall board is commonly used in wall and ceiling assemblies with one- and two-hour ratings (such as Underwriters Laboratories Fire-Rated Assemblies U495 and V416).
What kind of board is fireproof?
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.
Is regular gypsum board fire rated?
All gypsum panels are fire resistant and produced in a range of thicknesses, core formulations and optional special performance enhancements.
Is gypsum board considered combustible?
Gypsum board, because of its combustible facing, will not pass ASTM E136. Therefore remember, under the Mechanical Subcode, gypsum wallboard is classified as a combustible material.
What’s 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.
Why does gypsum have excellent fire resistance characteristics?
Gypsum Board is an Effective Fire Barrier Because steam will not exceed 212 degrees F under normal atmospheric pressure, it very effectively retards the transfer of heat and the spread of fire.
What material does not burn in fire?
In contrast, a fire resistant material is one that doesn’t burn easily. One example of this is the artificial stone used in kitchen countertops, like the DuPont brand Corian. The plastic of a Corian countertop is filled with finely ground rocks made of hydrated aluminum oxide, a chemical compound that doesn’t burn.
What is the best fireproof board?
Gypsum board
Gypsum board, also known as drywall, is the most commonly used fire-resistant interior finish. Type X gypsum board is treated with additives to improve its fire-resistance property, making it a popular choice.