1/2" Interior Ceiling Board is specifically formulated to meet the need for a lower weight ceiling panel with increased integrity in its gypsum core, making its sag resistance equivalent to 5/8" Type X wallboard. American Gypsum's 1/2" Interior Ceiling Board is designed for use in wall and ceiling applications spaced no more than 24" o/c, and approved to be applied parallel or perpendicular to ceiling framing spaced up to 24" o/c, even when a hand applied or water-based texture is used for decoration.
American Gypsum products contain no asbestos and no detectable levels of formaldahyde.
5/8" wallboard panels were once considered the best product for ceiling applications where the framing is spaced up to 24" o/c. However, product weight has always been a hindrance to proficient construction. The lighter weight 1/2" Interior Ceiling Board is specifically designed for interior ceilings in standard residential and commercial applications where framing members are spaced up to 24" o/c and a water-based texture will be used.