We are using special drywall to reduce the possiblity of mold growing on the walls.  National Gypsum Gold Bond XP is designed to be mold resistant.  To distinguish this product from others, the exterior of the drywall is purple.  When we were getting bids, some of the contractors didn’t know what ‘National Gypsum Gold Bond XP‘ was, but every single one knew about ‘purple drywall’

Click on the pictures below for the larger sizes