Exterior Gypsum Sheathing

Basic Uses

Exterior Gypsum Sheathing is recommended for use in residential or commercial buildings, and provides fire resistance and additional structural strength when used under exterior finishes such as wood, metal or vinyl siding, masonry veneer, stucco, shingles, etc. Exterior Gypsum Sheathing is designed for direct attachment to wood framing with galvanized nails or staples and screws, or metal framing by the use of screws. The joints are not intended for finishing with drywall joint compound and tape.

Product Data

Sizes

Special lengths may be available on special order. Consult your American Gypsum sales representative for details.

Technical Data

Storage and Handling

Exterior Gypsum Sheathing board does not generate or support the growth of mold when it is properly transported, stored, handled, installed, and maintained. However, mold spores are present everywhere and when conditions are favorable; mold can grow on practically any surface. 

Where necessary, Exterior Gypsum Sheathing may be stored outside for up to one month, but must be stored off the ground and shall be sheltered from the elements with a protective covering. Sufficient risers must be used to assure support for the entire length of the wallboard to prevent sagging.

Gypsum board must be protected during transit with a weather-tight cover in good condition. Plastic shipping bags are intended to provide protection during transit only and must be promptly removed upon arrival of the load. Failure to remove the shipping bag can increase the likelihood of developing conditions favorable to the growth of mold.

Gypsum board that has visible mold growth must not be used. For additional information, refer to Gypsum Association publication,

"Guidelines for the Prevention of Mold Growth on Gypsum Wallboard" (GA-238).

Gypsum board shall always be stacked flat - NEVER on edge or end. Gypsum board stacked on edge or end is unstable and presents a serious hazard should it accidentally topple. Gypsum board should be placed so weight is evenly distributed and the floor is not overloaded.

Applicable Standards

LEED Contributions

Our products can contribute to the following credits within the Materials and Resources (MR) category.

• LEED MR Credit 2: Construction Waste Management
• LEED MR Credit 4: Recycled Content
• LEED MR Credit 5: Regional Materials

Our products can contribute to the following credit within the Indoor Environmental Quality (IEQ) category.

• LEED IEQ Credit 4.6: Low-Emitting Materials - Ceiling and Wall Systems (SCHOOLS ONLY)

To learn more please click the LEED link at right.