The best way to get rid of the glue is to grind it off with an electric grinder and a diamond cup wheel. When screwing the cement board down, space them about 16 inches apart . You can order up to 3 FREE cut samples (10cm x 10cm) at a time. Use a roller extension pole to help you cover hard to reach areas is needed. It's actually a much more nuanced and complicated subject then you think. I put up many walls with nothing over 20 years ago, they are still there. But the application is pretty easy. I have actually heard of people using tarpaper for this, but I chose to use RedGard. Even if you use a waterproof underlayment membrane, the floor will still be either 1/4″ or 1/2” higher Applying RedGard will block out moisture and yes, you would then need to use a polymer modified thinset. Nor will they tell you how to tile over it, or what color grout to use. I got two gallons at Home Depot yesterday. You're correct if you use the shluter kerdi membrane you do not use a vapour barrier since it creates a sandwhich effect that doesn't allow the substrate to breath. 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. How to Install Wall Tile Over Backer Board. We like to keep all the questions for the same project on one. Unless you meant ‘can I tape the gap and use redgard over it’, in which case the answer is yes. We rolled the RedGard on the cement They'll just tell you how to hang their product. Rock-On #9 x 1-1/4 in. GBA Editor Martin Holladay | Jul 26, 2015 06:53am | #3 Yasir, Kerdi-Board . You will also use it to attach the tile to the backer board. You absolutely need to include some sort of substrate (cement board, green board, regular drywall) with the Schluter-Kerdi waterproofing kit. The RedGard was supposed to be compatible with cement board, but the manufacturers instructions did not specifically mention HardiBacker, so I called both Custom Building Products and Hardie, and they both said 'should be :goodluck: muskymike 12-05-2005, 09:13 AM Hi Neil, I merged your threads together. 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. It's all about the It won’t hurt to use RedGard on all the cement board. I have the HardiBacker board up and the seams are taped and mudded with alkali resistant mesh tape and thin-set. Learn if you can install tile over concrete whether it be directly onto the concrete or installing it onto a cement board or an uncoupling membrane. 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). Step 3 Pre-coat corners heavily and lay fiberglass mesh tape that is 6 inches wide into the wet RedGard to reinforce the transition. After the insulation is in place you will want to add a vapor retarder, sometimes called a vapor barrier, if you need one. The other option was to Please consider joining my Patreon network. All other samples will be full size and paid for. Hi lads, this is following on from my post the other night where i have decided to use hardie cement boards instead of plywood due to the poor quality of ply now available. 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. You want to use screws that countersink all the way into the cement board. Then, the cement board is installed on top of Now days in my own home I do use Redguard even though just cement board will outlast me. Home Depot carries the brand Backer-On screws that are great for this job. Mix the thinset as if you’re mixing batter. I suggest shimming the studs (only if you have to) to get the cement board down over the tub lip. Cover the tub with plywood and tap a flat bar behind it - you may be If it’s too large to fill with caulk it’s too large to fill with redgard. We chose DensShield for its better environmental attributes. 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 Do we need to apply RedGard over it or would it be an overkill? 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 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 While I prefer using 1/2” cement backer board over a plywood subfloor, you may be able to get by with 1/4” backer board instead. You need to make sure that the entire gap between the boards is filled up with the thinset. James Great website and guides, Roger. You could use a foam board like Wedi or a leveling compound. A . Backer board is installed as underlayment for the tiles to prevent moisture from damaging the walls and to create a … Take a trowel or a taping knife and use it to apply the thinset to the gap. You could use a foam board like Wedi or a leveling compound. Don’t use tile mastic in wet areas like showers, over cement board, fiber cement board, Kerdi, floors, or with glass tile, large format porcelain tile, natural stone, or most anywhere else. If you are not sure if you need insulation in your walls follow along with this flow chart. If you want to use a backer board with a built in moisture barrier than you should use DensShield by Georgia-Pacific. An alternative to the kerdi would be to use the redguard over a cement backer unit that can be placed below the waterline like Wonderboard or Durarock. I also read that DensShield backerboard has a waterproof layer over gypsum core. 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. Hope this helped. Over concrete, you don’t want to use cement board. And … The waterproof membrane isn't … From what I read in the posts on backerboards in GBA I see several comments on how well RedGard membrane is performing for the shower and tub areas. Do not use WonderBoard® Lite as a structural load bearing member. Always add the dry thinset mix to the water — not the other way around. If there are any cracks in the floor, you need to use some sort of a membrane. 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. The only place it’s OK to use it is when tiling in non-wet areas, over drywall, with small ceramic tile. 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. Finally, it must be well adhered, if not you need to start over. The contractor will have to buy a 1 gallon bucket and follow the directions for your particular situation. The cement board should be plumb, hence the need for shims sometimes. How to Waterproof Cement Board around a bathtub. WonderBoard® Lite is not a waterproof barrier. Hi, I am re-doing my shower. Tip Before tiling your shower, you'll have to remove any existing drywall and replace it with cement backer board. 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. Definitely use cement board instead of green board. You could go with kerdi over cement board, you will need an expert to tell you if this is better then kerdi over drywall, though i will guess its unnecessary. Cement board manufacturers won't tell you the steps that precede the hanging of the cement board. If you … You can choose which samples are free in the checkout. Red guard is only one product in a zoo of shower waterproofing systems and methods. However, I have been hearing that Redgard does not work well with HardieBacker … Not every wall does. Serrated Flat Head Star Drive Cement Board Screws (185-Pack) $7.98 Product Overview RedGard Seam Tape is a membrane fabric that is used for the seams between RedGard mat installations. Use a drill fitted with a mixing paddle to mix the thinset. No, you’ll need to tape and mud it, then use redgard over that. 3 Yasir, Kerdi-Board caulk it ’ s too large to fill with RedGard follow along with flow! A polymer modified thinset replace it with cement backer board do you need to use redgard over cement board much nuanced... Leveling compound a leveling compound of over concrete, you ’ re mixing batter contractor will have to any! Then use RedGard over that hard to reach areas is needed moisture and yes you. 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Gap and use RedGard over that we need to use a foam board like Wedi or a leveling.. The only place it ’ s OK to use RedGard over that cracks...

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