GlasRoc® Shaftliner for Multi-story Buildings and Multi-family Residential Applications. GlasRoc® Embedded Glass Reinforced Gypsum™ (EGRG™) Shaftliner for use in Shaftwall and Area Separation Firewall Systems is a 1" (25.4 mm) thick gypsum board with a specially formulated fire resistive, noncombustible, and moisture resistant core with embedded reinforcing glass mat and a protective acrylic coating on the exterior surface.

Technical Information

GlasRoc® Shaftliner is designed and engineered for use in constructing lightweight Shaftwall and Area Separation Firewall assemblies. GlasRoc® Shaftliner is UL Classified and ULC Listed in fire resistance designs and features double beveled edges for easy installation. In addition to its fire resistive properties, GlasRoc® Shaftliner is also designed and engineered to provide added protection against mold. When tested for mold resistance by an independent lab, GlasRoc® Shaftliner achieved the highest possible score of 10 per ASTM D3273, "Standard Test Method for Resistance to Growth of Mold on the Surface of Interior Coatings in an Environmental Chamber. Product Data: Thickness: 1" (25.4 mm) Width: 2' (610 mm) Standard Lengths: 8' (2440 mm), 10' (3050 mm) and 12' (3660 mm) Edges: Double beveled Packaging: Per piece Weight: 4.0 psf (19.5 kg/m2) For detailed Technical Data, please see the Product Data and Submittal Sheet.


Installation of GlasRoc® Shaftliner boards should be consistent with methods described in the standards and references noted. GlasRoc® Shaftliner should be installed with the labeled side facing the weather exposure during construction. Please see the GlasRoc Shaftliner Brochures for complete installation instructions.

Warranty Details

Please see the attached document for complete warranty details.

Sustainability Information

CertainTeed takes pride in providing the best solutions to make the spaces where we work, live, and play healthier and safer. This means offering high-performing products that create better living environments.

Our products improve building energy efficiency and reduce building energy consumption for the life of the structure. As a result, they help conserve nonrenewable energy sources, decrease dependence on hydrocarbons and lower greenhouse gas emissions.

CertainTeed’s ongoing commitment to sustainability in our manufacturing operations incorporates the principles of industrial ecology, managing energy and water, and reducing waste.


Our ecomedes Sustainable Product Platform allows you to quickly access the product information and certifications you need, calculate contributions to LEED and other green building rating systems and create and save a group of products using the project feature. The information is free to access and always up to date.

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