Moisture resistant gypsum board is a paper-faced gypsum panel developed for interior areas where humidity is higher than normal dry rooms. In many markets, it is also called green gypsum board, green plasterboard, MR board, water resistant plasterboard or humidity resistant drywall.
The board is made with a gypsum-based core and paper facers. Moisture-resistant additives are used to improve its suitability in damp indoor conditions. The green face paper helps workers identify it quickly during storage, cutting and installation.
Its purpose is not to replace waterproof coating, tile backing systems or cement board. Its real value is to give contractors and buyers a more suitable gypsum board option for kitchens, bathrooms, laundry rooms, garages and similar interior spaces.