Drywall & Backer Board

• Dry walling your bathroom is a good design to have the perfect water resistant finish. Water resistant dry wall is made out of gypsum, which is preferred on the shower stall ceilings and around the area of bathtubs. Drywall is called Greenboard, generally. Green board is slightly on the costlier side but better than any other waterproof finish.
• Another best resolution for your bathroom is concrete backer board. Concrete backer board has a solid concrete hub and is armored with fiberglass mesh. It's ideal for wet areas like whirlpool decks, shower walls and bathtub surrounds. Backer board is generally tough to cut than wallboard. Use a straightedge guide and score a line a few times using a carbide-blade cutter or a short-bladed utility knife. Crack the board along the score line and cut any remaining mesh. If the backer board doesn't quite meet flush with a drywall surface, fur out behind the backer board with felt strips, or for wider gaps use wood furring strips.