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ToughRock® Lite-Weight Fire-Rated Gypsum Board

  • Designed for a variety of fire-rated walls and ceilings1
  • Lighter in weight – easier to lift, carry and install
  • As easy to finish as ToughRock® Fireguard X® Gypsum Board

1Consult UL Fire Resistance Directory for assembly information.

Lighten up installation and meet requirements for ASTM C1396 Type LWX gypsum drywall in fire-rated walls and ceilings

This 5/8” (15.9 mm) panel is UL certified Type LWX for use in a variety of fire-rated wood and steel-framed assemblies, including some fire-rated ceiling assemblies.1 No back blocking is required for fire-rated ceiling assemblies as with some 5/8″ lightweight products. ToughRock® Lite-Weight Fire-Rated Gypsum Board’s noncombustible (as described and tested in accordance with ASTM E136), dimensionally stable gypsum core has been reinforced with glass fibers, increasing its strength.

1Consult 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.

Fire Resistance

Enhanced fire resistance – UL certified Type LWX

Light Weight Applications

Specialty application – 54” (1372 mm) width


Physical Properties

5/8″ (15.9 mm)


4’ (1220 mm), 54” (1372 mm), 60” (1524 mm) ± 3/32” (2.4 mm)


8′ – 14′ (2440-4270 mm)


2.0 (9.0) lbs./sq. ft., nominal (kg/sq.m)1


°F•ft2•hr/BTU (m2•K/W): 0.56 est. (0.10)

Humidified Deflection

5/8” (16 mm)2

1Represents approximate weight for design and shipping purposes. Actual weight may vary depending on manufacturing location and other factors. 2Specified minimum values are as defined in ASTM C1396.

Warranty / Certifications
GREENGUARD Gold Certification

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

Product Resources

Tech Guides
Safety Data

Product FAQs

What is the fire rating of ToughRock® Lite-Weight Fire-Rated Gypsum Board?

There is not a fire rating on an individual board. The fire rating is based on an entire assembly (studs, board, fasteners, etc.) being tested together. Please consult the Gypsum Association GA-600 Fire Design Manual or UL Fire Resistance Directory for specifics on a particular fire rated assembly. For additional information concerning fire ratings and fire safety, go to

What should we do if the gypsum board gets wet?
Should gypsum board be installed vertically or horizontally?
How often is a control joint required?

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