Two new wallboard panels from G-P Gypsum, DensArmor Interior Guard and DensArmor Plus Interior Guard, are designed to resist mold and mildew growth on interior walls and ceilings. The former has a noncombustible gypsum core with an inorganic coated glass mat on the back and smooth, heavy-duty paper on the face. The latter has glass mats on the board's face and back.
The fiberglass provides protection from moisture in the stud cavity because it is inorganic and therefore not a food source for mold. G-P recommends using fiberglass joint tape to reduce the risk of mold growth further. The Plus product also has glass mats on the side, so there's no vulnerability at the seam, says Alan Thielemann, vice president of sales and marketing. He adds that both wallboards work with steel as well as wood framing.