--- title: "Moisture-Resistant Drywall" description: "Moisture resistant drywall in Orange County. The right board for bathrooms, laundry rooms, and humid spaces, installed with proper detailing." url: "https://hanenburg-drywall.vercel.app/services/specialty-drywall-systems/moisture-resistant-drywall" section: "Services" business: "Hanenburg Drywall" location: "Irvine, California" updated: "2026-09-25" --- # Moisture-Resistant Drywall Moisture resistant drywall uses a treated core and moisture resistant facing to handle elevated humidity better than standard board. It suits bathrooms, laundry rooms, and kitchens, but it is not designed for direct water contact and should not be used behind tile in a shower. Moisture resistant board, still widely called green board from its traditional facing colour, handles ambient humidity far better than standard gypsum. It belongs on bathroom walls and ceilings, in laundry rooms, and around kitchens. What it is not is waterproof. This distinction causes a great deal of expensive damage. Moisture resistant board installed as tile backer inside a shower will eventually fail, because it is designed to resist humidity in the air rather than water running down it. Wet areas need cement board or another purpose made tile backer. We specify the right material for each zone rather than using one board everywhere. ## Why this matters - Correct board for humid environments - Clear separation between humid zones and genuinely wet zones - Mold resistant options where humidity is persistent - Correct fastener and joint treatment for the environment ## Our Process 1. **Define the Performance Target**: Moisture, fire, sound, and impact are four different problems. We establish which one you are actually solving before specifying anything. 2. **Specify the Assembly**: Performance comes from the complete assembly, not the board alone. We specify board, framing, insulation, fasteners, and sealing together. 3. **Written Scope**: The estimate names the specific board type and assembly details, so what you are buying is unambiguous. 4. **Build to the Detail**: Specialty assemblies only perform when built exactly as listed. We follow the detail rather than approximating it. 5. **Verify and Document**: Assembly checked before close in, documented where an inspection or rating depends on it, then finished and cleaned. ## What's Included - Zone assessment separating humid from wet areas - Moisture resistant board in humid zones - Cement board or tile backer specified for wet zones - Corrosion resistant fasteners - Mold resistant compound where appropriate - Sealing at floor and penetrations ## Frequently Asked Questions ### Can moisture resistant drywall go in a shower? No. It resists humidity in the air, not direct water contact. Inside a shower or tub surround where tile is being installed you need cement board or a purpose made tile backer with a proper waterproofing membrane. Using moisture resistant gypsum there is one of the most common causes of failed tile installations and hidden mold. ### Is green board the same as mold resistant board? Not quite. Traditional green board resists moisture in its core and facing. Purpose made mold resistant board usually replaces the paper facing entirely with fiberglass, since paper is the food source mold actually grows on. In persistently humid spaces the fiberglass faced product is the better choice. --- **Hanenburg Drywall** 12 Elksford Ave, Irvine, CA 92604 Phone: (949) 446-1300 Email: info@hanenburgdrywall.com Hours: Mon to Fri, 8:00am to 4:00pm Serving all of Orange County with no travel surcharge. Request a free written estimate: https://hanenburg-drywall.vercel.app/contact/request-estimate *Last updated: 2026-09-25*