In April, Georgia-Pacific Corp. announced it will no longer manufacture paper-faced exterior gypsum sheathing. G-P points to gypsum board's susceptibility to excess moisture during construction as the reason. If wetted and not properly dried out, the paper facing on gypsum board provides an ideal environment for mold growth - a limitation of any wood-based product.
G-P is applying the technology it has used for more than 20 years in commercial construction to a new product for the residential market.
DensGlass Silver, a paperless exterior sheathing product, consists of a moisture-resistant core with glass mats on the front and back. The company says it offers "superior moisture and mold resistance when compared to paper-faced gypsum sheathing, OSB or plywood."