🚣Waterproof Backer Board Installation 🚣 Go Board is without a doubt one of my go-to backer boards for a tiled shower or tub surround. There are many great things about it: Its light and easy to cut (no dust, utility knife is all you need!) Already waterproof (outside surface is a waterproof membrane) Easy to waterproof seams and screw penetrations (sealant application is really simple) It's affordable!💰 Here's what's needed for a standard tub surround: 6 sheets of 3' x 5' sheets - Here's a 6