Waterproofing Boards 48 x 32 x 1/2"Premium Waterproof Shower Wall & Floor Panels 48" 32" " XPS Foam Core with Fiberglass Mesh & Thermal Insulation Coverage Options Each panel covers 10. 7 sq ft 5 Panels 53 sq ft 10 Panels 107 sq ft 15 Panels 160 sq ft 100 Panels 1,067 sq ft Why Choose Our Building Panels? Lightweight Yet Strong Engineered with extruded polystyrene foam, these panels are easy to handle and install while providing exceptional durability for your shower waterproofing