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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 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 do I know if my drywall is fire rated?
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.
Is Type C drywall fire rated?
Type C fire rated drywall (sometimes referred to as Improved Type X) is similar in composition to Type X, except that it has more glass fiber reinforcement and other ingredients in the gypsum core that makes its fire resistive properties superior to Type X.
Does 1/2 drywall have a fire rating?
Most Type X drywall has a one-hour fire rating. The fire rating for the 1/2-inch drywall used throughout the rest of the home is 30 minutes.
What is a 2-hour fire rated wall?
2. Gypsum Board: Two (2) hour rated walls have two (2) layers of 5/8″ Type ‘X’ gypsum wallboard panels on each side of the steel studs. The “Fire Tape” product would be used as an alternative to conventional joint tape in specific systems when: 3.
What’s the fire rating on 5/8 drywall?
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 a 1 hour fire wall?
According to the Engineered Wood Association, a one-hour rating indicates that a wall constructed in a manner similar to the one tested will contain flames and high temperatures, and support its full load, for at least one hour after the fire begins.
Is all drywall fireproof?
Although all drywall is fire resistant to a degree, type-X and type-C drywall are designed specifically to be used in fire-rated assemblies. These products help to contain fire in the area of its origin much better than regular drywall.
What does Type C Drywall mean?
Type C is an industry phrase to designate enhanced gypsum panels that exceed the requirements for Type X gypsum board in ASTM C1396. 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.
What is fire rated ceiling?
Physical Barrier An Underwriters’ Laboratories (UL) fire resistant rated ceiling system provides separation between the elements of the building services (i.e. ductwork and piping) and the occupied space below. A UL fire resistant rated ceiling also provides a known, specified fire resistance period.
Is Type C drywall moisture resistant?
Sheetrock® Brand Mold Tough® Panels Firecode® C (UL Type C) are 1/2 in. (12.7 mm) enhanced proprietary Type X gypsum panels that feature a noncombustible, moisture-resistant gypsum core that is encased in moisture- and mold-resistant, 100% recycled green face and brown back papers.
Can you use 1/2 inch drywall ceiling?
1/2-Inch-Thick Drywall Half-inch drywall panels are the standard thickness for interior walls, as well as ceilings. These panels are easy to carry and hang.
Does drywall catch on fire?
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. Once the water dissipates, the gypsum begins to heat past the boiling point of water, and may begin to burn.
Is fire rated drywall moisture resistant?
Applications for Fire-Resistant Drywall Although gypsum boards are inherently fire resistant to some degree, those products with fire ratings are designed to perform even better than regular drywall. Flames or intense heat drive the moisture trapped within the wallboard core out the cooler side.
How long will a 2-hour fire wall last in a fire?
Materials and Fire-Resistance Ratings The minimum fire-resistance rating is 2 hours, but fire walls can have ratings of 3 and 4 hours.
What makes a wall fire rated?
Fire Wall – A fire-resistance-rated wall having protected openings, which restricts the spread of fire and extends continuously from the foundation to or through the roof, with sufficient structural stability under fire conditions to allow collapse of construction on either side without collapse of the wall.
Do you need 5/8 drywall in garage?
6 Dwelling/garage fire separation: The wall between a house and garage must be separated by 1/2″ drywall. If there are habitable rooms above the garage, 5/8″ type X (fire-rated) drywall must be used at the ceiling.
What does 4 hour fire rating mean?
While many buildings have a 1- or 2-hour fire rating, 4-hour fire rated protection can easily save lives. To accomplish a four-hour rating, several elements must be considered. The rating is broken down by time for steel fire doors. Typically, this includes 20 minutes, 45 minutes, 60 minutes, and 90 minutes.
What is a Class 2 fire rating?
A Class II rating is given if the spread of flame is no greater than 215mm in the first 1½ minutes and on overall spread of no more than 455mm.
At what temperature will Drywall ignite?
Drywall/Gypsum wallboard (GWB) is an accepted fire barrier; however, it is also a huge fuel source for the first few minutes of exposure to a fire or even temperatures higher than 451 Fahrenheit.
Is drywall considered non combustible?
Because the Building Subcode allows such “composite” materials, gypsum wallboard can be considered noncombustible as defined by the Building Subcode. Therefore remember, under the Mechanical Subcode, gypsum wallboard is classified as a combustible material.
How much heat can Drywall take?
What is the maximum temperature that Sheetrock® Brand Gypsum Panels can withstand? Sheetrock® Brand Gypsum Panels can withstand temperatures up to 125°F.
Do ceilings have to be 5/8 drywall?
5/8″ Type X is most commonly used for ceilings due not only for its rigidity (no sagging), but also its fire-resistance and acoustical blocking. You’ll certainly want to use at least 2-inch drywall screws to hang it. Not sure adhesive is necessary or recommended unless you are covering existing drywall.
