ToughRock Gypsum Sheathing Panels
Georgia-Pacific ToughRock Gypsum Sheathing
ToughRock Fireguard X Gypsum Sheathing Fire-Rated
ToughRock Fireguard X Fire-Rated Gypsum Sheathing
Special Application Sheathing Panels
toughrock drywall panels

1/2″ ToughRock® Gypsum Sheathing and 5/8″ ToughRock® Fireguard X® Gypsum Sheathing

  • Substrate that is covered by an exterior finish cladding such as vinyl/fiber cement siding, masonry
  • Moisture-resistant,1 non-combustible gypsum core
  • Available in 1/2″ and 5/8″
  • 5/8” is UL and ULC classified Type X
  • Designed for direct mechanical attachment with screws, nails or staples to wood and metal framing
A versatile gypsum sheathing substrate for residential and commercial applications

1/2″ ToughRock® Gypsum Sheathing and 5/8” ToughRock® Fireguard X® Sheathing are recommended for use in new building construction or renovation work that is covered by an exterior finish cladding such as vinyl/fiber cement siding, masonry veneer or wire lath stucco.1 It is designed for direct mechanical attachment to wood or steel framing. 5/8” ToughRock Fireguard X Sheathing is UL and ULC classified Type X for use in a variety of fire-rated assemblies.2 ToughRock Sheathing is manufactured to meet the requirements of ASTM C1396, Section 9, and CSA-A82.27-M and Federal Specification SS-L-30D, Type II, Grade W, X and should be installed per ASTM C1280 and Gypsum Association documents GA-253 and GA-254

1ToughRock® Sheathing is not intended for long-term exposure to the weather. Local weather conditions will dictate the length of time sheathing may be left exposed. The sheathing should be covered by an exterior finish cladding or building felt or equivalent protection if weather conditions will be severe during construction. 2Consult UL Fire Resistance Directory for assembly information

*FIRE SAFETY CAUTION – Passing a fire test in a controlled laboratory setting and/or certifying or labeling a product as having a one-hour, two-hour, or any other fire resistance or protection rating and, therefore, as acceptable for use in certain fire rated assemblies/systems, does not mean that either a particular assembly/system incorporating the product, or any given piece of the product itself, will necessarily provide one-hour fire resistance, two-hour fire resistance, or any other specified fire resistance or protection in an actual fire. In the event of an actual fire, you should immediately take any and all actions necessary for your safety and the safety of others without regard for any fire rating of any product or assembly/system. For additional information concerning fire ratings and fire safety, visit our Product Fire, Safety and Use Information page.


Available in multiple sizes – 1/2″ and 5/8”

Fire Resistant

Enhanced fire resistance in 5/8” board


Physical Properties – 1/2“ ToughRock® Sheathing

nominal inches: 1/2″ (12.7 mm), ± 1/32″ (0.8 mm)3


nominal: 4′ (1220 mm), – 1/8″ (3 mm)3


standard: 8’ (2440 mm) ± 1/4″ (6.4 mm)3


lbs/sq. ft. nominal (kg/m²): 1.7 (9)1

R Value

0.45 (0.079)2

Humidified Deflection

10/8″ (32 mm)

Physical Properties – 5/8” ToughRock® Fireguard X® Sheathing

nominal inches: 5/8” (15.9 mm), ± 1/32” (0.8 mm)3


nominal: 4′ (1220 mm), – 1/8″ (3 mm)3


standard: 8’ (2440 mm) ± 1/4″ (6.4 mm)3


lbs/sq. ft. nominal (kg/m²): 2.2 (11)1

R Value

0.48 (0.085)2

Humidified Deflection

5/8” (15.9 mm)

1Represents approximate weight for design and shipping purposes. Actual weight may vary depending on manufacturing location and other factors. 2Per Gypsum Association document GA-235. 3Specified minimum values are as defined in ASTM C1396.


Certifications may vary by production location, please contact local representative for more information.

Product Resources

3-Part Specs
Tech Guides
Safety Data

Product FAQs

Does ToughRock® Sheathing carry an exposure warranty?

Georgia-Pacific Gypsum does not offer a limited warranty for ToughRock Sheathing for exposure to weather conditions. Per the Gypsum Association publication, GA-253, the product needs to be covered with a weather-resistive barrier within 30 days of installation. If you require a product that does have a limited warranty for exposure to normal weather conditions, consider using DensGlass® Sheathing or DensElement® Sheathing.

How is ToughRock® Sheathing installed?
Is ToughRock® Sheathing mold resistant?
Does ToughRock® Sheathing have recycled content?
Can one apply adhered membranes or fluid applied air barriers to ToughRock® Sheathing?
Are there published negative wind load values for ToughRock® Sheathing?

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