There are several non waterproof cement boards (CBU); permabase, hardie board, wonderboard and any of the ones that look like cement made into a sheet. The waterproof boards are Wedi, Densheild, and kerdi board.
Super Strong, Waterproof Foam Core. Use the foam core from Readi-Board to create durable foam core sandwiches of paper and fiberglass. Abstract
It is used just like any other inherently waterproof foam core board like Wedi, etc. It isn’t quite as stiff as Wedi so depending on your install you may wish to use extra blocking behind it we simply spaced the studs at 12″ instead of 16″.
Schluter-KERDI-BOARD is a multifunctional tile substrate and building panel, which can also be used for creating bonded waterproofing assemblies with tile coverings. It consists of an extruded polystyrene foam panel, with a special reinforcement material on both sides and fleece webbing for effective anchoring in thin-set mortar.
Note: See section “Waterproofing” on the use of KERDI-BOARD in bonded waterproofing assemblies. Spot-bonded KERDI-BOARD. Minimum board thickness = 3/8" (9 mm) 1. Remove all surface contaminants from the substrate that may weaken the bond. 2. Place spots of thin-set mortar on the KERDI-BOARD panel or substrate in intervals of approx. 12" (30 cm).
Wedi Board panels are the ultimate lightweight ceramic tile backerboard, designed to provide a waterproof barrier for walls and floors. It is also suitable for countertops bit should not be subject to extremely hot items.
Which Shower Tile Backer board is best? Foam boards are lightweight, easy to cut, and a completely waterproof. Pictured: Wedi Board tile backer board. I often get questions on what sort of tile backer board to use for showers and tub surrounds.
Makes shower construction simpler and faster; prevents leaks and mold growth. Available from Schluter Systems.
Wedi board is a waterproof tile backer board made out of foam 4. Waterproof foam backer board Foam backer board is waterproof so tile sticks directly to it. Lastly, the final method to be covered is foam backer board building panels. The most popular products are Wedi board and Kerdi board. However, there are a good number of competitors coming onto the market.