Bathtub, Walls - Wood or Metal Studs - Backerboard

Bathtub, Shower Walls - Wood or Metal Studs - Cementitioius-Coated Foam Backer Board

Walls, Interior - Metal Studs - Gypsum Board, Organic Adhesive

Walls, Interior - Sound/Fire Rated - Metal Studs - Backerboard, 1 Hour