Foil Backed Gypsum Board Panels consist of a fire-resistive gypsum core encased in heavy natural-finish paper on the face side and strong liner paper on the back side to which aluminum foil is laminated. The ends are square-cut and finished smooth.
Foil Backed Gypsum Board can be used for exterior walls and ceilings in new construction and remodeling. The aluminum foil, laminated to the back surface, is a vapor retarder to keep interior moisture within the building at a suitable comfort level. For use with furred masonry, wood or steel framing, Foil Backed Gypsum Board is effective for single-layer applications and as a base layer in double-layer applications where a vapor retarder of 1 perm or less is required.
WARNING:Cancer and Reproductive Harm - www.P65Warnings.ca.gov