XP Board


National Gypsum Gypsum Board Systems Catalog



XP Gypsum Board was designed to provide extra protection against mold and mildew compared to standard wallboard products. The face paper is folded around the long edges to reinforce and protect the core, and the ends are square-cut and finished smooth. Long edges of the panels are tapered.

Features & Benefits


  • Resists the growth of mold per ASTM G 21 with a score of 0, the best possible score
  • Resists the growth of mold per ASTM D 3273 with a score of 10, the best possible score
  • The gypsum core will not support combustion or transmit temperatures greatly in excess of 212°F (100°C) until completely calcined, a slow process
  • Scores and snaps easily, no special handling requirements
  • Less than 5% water absorption per ASTM C473.