But the application is pretty easy. You could use a foam board like Wedi or a leveling compound. It's all about the You could use a foam board like Wedi or a leveling compound. Tip Before tiling your shower, you'll have to remove any existing drywall and replace it with cement backer board. Cover the tub with plywood and tap a flat bar behind it - you may be HardieBacker® Cement Board with HydroDefense Technology provides the unmatched strength, ease of use, and excellent tile adhesion you’ve come to expect from HardieBacker®—now with a waterproof composition throughout Question 1: Will I need to use some sort of shim between the backside of the HardieBacker Cement Board (.42″ thick) and the wall studs so that the front side of the HardieBacker Cement Board is on the same plane as the front The other option was to If you … While it might sound like a good idea to install cement backer board over drywall before tiling the shower, the reality is that the drywall should be removed beforehand in most instances. Cement Board and Plastic Sheeting In this highly convenient, inexpensive, and popular application, a moisture barrier of 4- or 6-mil-thick plastic is installed directly over the wall studs. GBA Editor Martin Holladay | Jul 26, 2015 06:53am | #3 Yasir, Kerdi-Board . Red guard is only one product in a zoo of shower waterproofing systems and methods. All other samples will be full size and paid for. You can order up to 3 FREE cut samples (10cm x 10cm) at a time. Hi, I am re-doing my shower. If you didn't use poly sheeting behind the backer board, then you're SOL (unless you Redguard the finished installation - for that crimson look that's so popular). You can choose which samples are free in the checkout. I think this product is expensive, But even though the tile experts that taught me methods of redoing a bath surround, say that you do not need to waterproof the cement board they could not be more mistaken. I have actually heard of people using tarpaper for this, but I chose to use RedGard. I did not put a vapor barrier behind the backer board because I have been planning on using Redgard waterproofing membrane on the entire surface area of the HardieBacker. Do we need to apply RedGard over it or would it be an overkill? Unless you meant ‘can I tape the gap and use redgard over it’, in which case the answer is yes. I have the HardiBacker board up and the seams are taped and mudded with alkali resistant mesh tape and thin-set. I also read that DensShield backerboard has a waterproof layer over gypsum core. Backer board is installed as underlayment for the tiles to prevent moisture from damaging the walls and to create a … The waterproof membrane isn't … How to Waterproof Cement Board around a bathtub. Yes, you can redgard over the seam at the floor, and yes, you should install redgard over all the cement board if you don’t have a barrier behind it. The contractor will have to buy a 1 gallon bucket and follow the directions for your particular situation. You will also use it to attach the tile to the backer board. Either you use a vapor barrier behind the hardi, or you can use a waterproofing system (like redgard) over the hardi, but you should not do both. Installing Tile Directly on Concrete Ceramic and porcelain tile are so frequently installed at or above grade level on a cement board underlayment or directly on plywood that it almost seems novel to install tile directly on concrete. We like to keep all the questions for the same project on one. Over concrete, you don’t want to use cement board. Rock-On #9 x 1-1/4 in. If the area behind the backerboard must be kept dry, use RedGard® Waterproofing and Crack Prevention Membrane or Custom® 9240 Waterproofing and Anti-Fracture Membrane Should be plumb, hence the need for shims sometimes pole to help you cover hard to reach areas needed! A roller extension pole to help you cover hard to reach areas is needed i do use even! Editor Martin Holladay | Jul 26, 2015 06:53am | # 3 Yasir Kerdi-Board. Don ’ t hurt to use it to apply RedGard over it ’ s too large to fill with it! The seams are taped and mudded with alkali resistant mesh tape and mud it, or what color to. 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