ToughRock Lightweight Drywall Gypsum Wallboard
ToughRock Lightweight Drywall Wallboard, Gypsum Board
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ToughRock® Lite-Weight Gypsum Board

  • Lighter in weight – easier to lift, carry and install
  • Designed for improved sag resistance
Lighten up your project without losing strength.

Meet ASTM C1396 Section 5 gypsum wallboard and Section 12 gypsum ceiling board specifications, with the lighter, dimensionally stable ToughRock® Lite-Weight Gypsum Board. This ½” (12.7 mm) gypsum board is ideal for use as a wall or ceiling covering material in both new building construction and renovation work. ToughRock Lite-Weight Gypsum Board has been specifically designed to perform like a ceiling board where improved sag resistance is desired.


Lighter in weight than traditional ToughRock® Gypsum Board

Special Application

Specially designed with improved sag resistance, for ceiling applications


Physical Properties

1/2″ (12.7 mm), ± 1/64″ (0.4 mm)


4 (1220 mm), ± 3/32″ (2.4 mm)


8′ (2440 mm) to 16′ (4880 mm) ± 1/4″ (6.4 mm)


1.45 (7.1) lbs./sq. ft., nominal (kg/sq.m²)1


°F•ft2•hr/BTU (m2•K/W): 0.45 (0.08)2

Humidified Deflection

5/16″ (8 mm)3

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.

Warranty / Certifications
GREENGUARD Gold Certification

Product Resources

Tech Guides
Safety Data

Product FAQs

Can I use gypsum board in ceilings at 24" o.c. framing?

According to the Gypsum Association publication GA-216, gypsum board could be applied in a ceiling framed 24″ o.c. provided the board length is at right angles (perpendicular) to the framing members. When a water-based texture is to be applied, the maximum spacing for traditional 1/2″ gypsum board is 16″ o.c.

We always advise our customers to use either 5/8″ gypsum board, ToughRock® CD® ceiling board, or 1/2″ ToughRock Lite-Weight in such applications. Once the board sags, it is much more expensive to replace than to use the right product initially. Sag in the ceilings of new homes is a common complaint. Most often, research reveals it is not the board but job site conditions that cause the board to sag. Propane heaters combined with poor ventilation cause build-up of moisture in the house.

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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