ToughRock® Gypsum Sheathing product rendering panels are stacked

ToughRock® Gypsum Sheathing close up of side tape which are vertical lines in the colors, gray, brown, and white

ToughRock® Gypsum Sheathing

Ideal as a substrate for exterior finishes, including vinyl/fiber cement siding, masonry veneer, and stucco.

Product Details

Discover the power and versatility of our 1/2″ ToughRock® Gypsum Sheathing and 5/8” ToughRock® Fireguard X® Sheathing, engineered by Georgia-Pacific for superior performance in any new building construction or renovation work. Whether you’re working with vinyl/fiber cement siding, masonry veneer or wire lath stucco, our products are perfectly suited for exterior finish cladding. They can be mechanically attached directly to wood or steel framing without fuss¹.

The 5/8” ToughRock Fireguard X Sheathing is specially designed for fire-rated assemblies, boasting a UL and ULC classified Type X rating that demonstrates its ability to meet a variety of fire-rated requirements. Our ToughRock Sheathing adheres to the stringent requirements of ASTM C1396, Section 9, and is installed per ASTM C1280 and Gypsum Association documents GA-253 and GA-254².

FEATURES AND BENEFITS

Durable Design: Built with a non-combustible gypsum core and moisture-resistant recycled paper surfacing, ensuring long-lasting performance in residential and commercial applications.
Fire-Rated Protection (5/8” ToughRock® Fireguard X® Sheathing): UL and ULC Type X classified for a variety of fire-rated assemblies, providing enhanced safety and compliance.
Versatile Installation: Designed for direct mechanical attachment to both wood and steel framing.
Quality Standards: Manufactured to meet ASTM C1396, Section 9, and approved for installation per ASTM C1280 and Gypsum Association documents GA-253 and GA-254.

Product Specifications

PERFORMANCE ATTRIBUTES

R Value	0.45 (0.079)²
Humidified Deflection	10/8″ (32 mm)
ASTM Type	ASTM C1396; ASTM C1629; ASTM C473; ASTM E136; ASTM E84
Flame Spread & Smoke Development	15 & 0 (product dependent)
Fire Rating	Type X
Mold Resistance	(10/10)

PHYSICAL ATTRIBUTES

Length	standard: 8’ (2440 mm) ± 1/4″ (6.4 mm)³
Width	nominal: 4′ (1220 mm), – 1/8″ (3 mm)³
Thickness	nominal inches: 1/2″ (12.7 mm), ± 1/32″ (0.8 mm)³
Weight	lbs/sq. ft. nominal (kg/m²): 1.7 (9)¹
Edge	Square

PERFORMANCE ATTRIBUTES

R Value	0.48 (0.085)²
Humidified Deflection	5/8″ (15.9 mm)
ASTM Type	ASTM C1396; ASTM C1629; ASTM C473; ASTM E136; ASTM E84
Flame Spread & Smoke Development	15 & 0 (product dependent)
Fire Rating	Type X
Mold Resistance	(10/10)

PHYSICAL ATTRIBUTES

Length	standard: 8’ (2440 mm) ± 1/4″ (6.4 mm)³
Width	nominal: 4′ (1220 mm), – 1/8″ (3 mm)³
Thickness	nominal inches: 5/8” (15.9 mm), ± 1/32” (0.8 mm)³
Weight	lbs/sq. ft. nominal (kg/m²): 2.2 (11)¹
Edge	Square

CERTIFICATIONS

ULC Listed certification mark indicating the product complies with Canadian safety standards established by Underwriters Laboratories of Canada.

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

¹ Represents approximate weight for design and shipping purposes. Actual weight may vary depending on manufacturing location and other factors.

² Per Gypsum Association document GA-235.

³ Specified minimum values are as defined in ASTM C1396.

* 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.

Consumer Product Safety Act (CPSA) – For CPSA General Certificate of Conformity, please click here.