GlasRoc Sheathing 5/8” Gypsum Board - Seattle

Declaration details

Manufacturer

CertainTeed Saint-Gobain

Program operator

Smart EPD

Declaration number

SmartEPD-2025-071-0526-02

Date of issue

December 16, 2025

Valid until

December 16, 2030

Product category rules (PCR)

Smart EPD® Part B PCR for Gypsum Panels, 1000-004, v2.0 (version 2)

Standard

ISO 14025:2006 and ISO 21930:2017

Functional unit

1,000 ft2 of product

System boundary

Cradle to grave (A1 - A3, A4, A5, B1 - B7, C1 - C4)

Product specificity

Product Specific

Manufacturing specificity

Facility Specific

Manufacturing plant

CertainTeed Gypsum (5931 E Marginal Wy S, Seattle, WA 98134, USA)

Product category

Finishes › Gypsum

Product SKU

N/A

Verifier

Anna Lasso, Smart EPD

LCA software

Sphera LCA for Experts (formerly GaBi) 10.7.1

Program instructions

Smart EPD General Program Instructions v.1.0, November 2022

Life cycle assessment results

Results per 1,000 ft2 of product.

Environmental Impact Assessment Results

Resource Use Indicators

Waste and Output Flow Indicators

Carbon Emissions and Removals

ND = not declared. Life cycle modules: A1-A3 product stage, A4-A5 construction process, B use stage, C end of life, D benefits and loads beyond the system boundary.

Material composition

Hazardous substances

No regulated hazardous or dangerous substances are included in this product.

Scenarios

Transport to the building site (A4)

Fuel type

Diesel

Vehicle type

Commercial tractor-trailer truck

Transport distance

448 km

Capacity utilization

70%

Packaging mass

1.938 kg

Transport to the building site (A4)

Fuel type

Diesel

Vehicle type

Rail

Transport distance

208 km

Capacity utilization

70%

Packaging mass

1.938 kg

Transport to the building site (A4)

Fuel type

Diesel

Vehicle type

Single unit truck

Transport distance

40 km

Capacity utilization

70%

Packaging mass

1.938 kg

End of life (C1-C4)

Collected with mixed construction waste

1098 kg

Product or material for final disposal

1098 kg

Product description

CertainTeed's GlasRoc Sheathing is a high-performance, non-combustible gypsum-based sheathing that offers exceptional fire resistance, moisture resistance, and mold resistance for exterior wall and soffit systems. Made from a combination of gypsum core and fiberglass mat facers, the product is engineered to withstand the elements and provide long-lasting performance.

GlasRoc Sheathing is designed to be used in exterior wall applications, providing a strong and durable surface for finishing materials such as stucco, brick, and siding. The sheathing is lightweight and easy to handle, making it easy to transport and install. It is also available in a variety of sizes and thicknesses to meet the specific needs of any construction or renovation project. The product is designed to provide exceptional moisture resistance, which is essential for protecting the integrity of the building envelope. The fiberglass mat facing on the sheathing provides a barrier against moisture infiltration, helping to prevent damage to the framing and insulation. This feature also helps to improve indoor air quality by preventing the growth of mold and mildew.

Interpretation

Based on the results from the life cycle assessment model, the life cycle impacts are strongly driven by the manufacture. The impacts of the manufacture are primarily attributed to the natural gas usage needed for the ovens to dry the boards. The natural gas usage in the manufacture accounts for as much as 43% of the cradle-to-grave environmental impact potentials for CertainTeed GlasRoc Sheathing 5/8” Gypsum Boards at the Seattle, WA facility.

The manufacturing of gypsum board (A3) has the highest contribution to Global Warming Potential impacts. The use of internally recycled gypsum material helps to reduce the overall environmental impact potentials by reducing the amount of external raw materials needed for the process.

Another potentially significant contributor to the overall environmental impact results is seen in the results for the installation of the Gypsum Boards. The installation waste accounts for the majority of the impacts for installation. The PCR requires the use of a 10% installation waste scenario in the absence of actual data. As there is currently no actual installation data available, and because installation techniques may vary widely among installers, CertainTeed has little to no influence on the installation impacts.