The kerdi membrane will probably do the same, and its regularly installed over drywall which is probably less stable. Connect and share knowledge within a single location that is structured and easy to search. Some being easier to work with than others. If a law is new but its interpretation is vague, can the courts directly ask the drafters the intent and official interpretation of their law? Unlike cement boards, you can bend this material without it breaking. I imagine we could share some good stories. Kerdi, a waterproofing membrane made of a special polyethylene fabric, should be allowed to completely dry prior to tiling. The 1/4-inch-thick board is typically used on floors and countertops. When applying Kerdi membrane to cement board, the edges and seams of the membrane must be lapped, meaning that each layer should overlap the portion underneath it by a minimum of two inches. I agree that gypsum seems very questionable anywhere in the wet areas of a shower. En cliquant sur Accepter , j'accepte l'utilisation des cookies telle qu'elle est dcrite plus en dtail dans la Politique d'Utilisation des Cookies de Houzz. Kerdi-Board panels allow the installer to prepare and create a broad range . When applying the thin-set, it should be applied in such a way that it fully fills any empty space between the Tile and Schluter product and is solid enough to support the weight of the tiles being installed. Yup! ), Minimising the environmental effects of my dyson brain, Finite abelian groups with fewer automorphisms than a subgroup. All it takes is the right preparation. Anyone who has done more than 1 shower shouldn't start without knowing that. Your real issues are the lack of proper corners on this shower. What's the difference between a power rail and a signal line? Overall, putting Kerdi over regular drywall can be done, with the proper steps in place to properly install the membrane and its components. Since KERDI is impervious, it does not deprive the mortar of its moisture. Once the adhesive has been applied and has had time to properly cure, then the KERDI membrane can be applied to the wall. How do I align things in the following tabular environment? Kerdi membrane prevents water damage and mold development. Firstly, it is important to ensure the wall is adequately prepared and that it is smooth, flat and free of defects. We use a pump action garden sprayer and its usually dry by the time we clean the sprayer. I appreciate your help and your quick response. You have to seal every little hole in the floor so the underlayment doesnt seep into spaces below. Is it suspicious or odd to stand by the gate of a GA airport watching the planes? Water-resistant gypsum board, or green board, was used in the past as a tile backer but is no longer recommended, mainly because better products are available. No, you do not need to install a vapor barrier, as Kerdi Board is the vapor barrier. When screwed to the framing, thin strips of cement board fracture more easily than thin strips of fiber-cement. I hope you made the guy flood test his work prior to tiling the shower floor. The Kerdi is essentially replacing the backerboard. On the other hand, a Schlter system offers improved thermal insulation, which can help to reduce heating costs. Using cement board and a sheet membrane . Sealing the tub flange for tile: 3 methods - DIYTileGuy Do new devs get fired if they can't solve a certain bug? What was the indicator that let you know that spritzing was not enough, and that you needed to 'sponge' the Hardi? Sure, you can do it.just be sure to "spritz" or wet the hardi thoroughly before.it's pretty "thirsty.". Wedi vs. Kerdi Waterproof Membranes: Which Is Better? Kerdi-Board is an extruded polystyrene foam panel, with reinforcing material on both sides, covered by fleece webbing for effective anchoring of thin-set mortar. Need help liner vs liquid membrane question. . We installed cement board on the walls, and today when we attempted to apply the Kerdi membrane we could not get it to adhere. Building Panel: Price $ 119 00 $ 202 06 $ 279 00. After today's tutorial, you'll gain the confidence to transform your old bathroom into a new space. @DMoore- OK, I agree that with redguard it would be redundant. 1. If so, that means breaking up the floor pan. It is important to overlap the edge of the membrane so that it covers slightly more than half of the drywall behind it. DIYers on this forum seem to have nothing but problems with Hardi. I guess I could save a few $ and laminate 1/4" drywall there instead.IOW, is hardi OK to level out the tub flange?Not that it matters, but the tile will be 3x6 carrara to the ceiling.Casey. Kerdi Board is suitable for a number of interior applications. All shower/tub areas should have concrete board (I prefer hardiboard). I hang Kerdi on cement board and fibercement board all the time. Cement board is particularly vulnerable to water damage, so waterproofing can help protect it and help it last longer. On a vertical surface, very little moisture . Shower walls construction made easy with Kerdi-Board panels. - La Tuilerie Kerdi Membrane Over Plywood ThePlywood.com I still wet the walls first. When installing KERDI with unmodified thin-set mortar over particularly dry and porous substrates, it is recommended to wet the substrate first, in order to help prevent premature drying or skinning of the thin-set mortar. Shower Install - Cement Board or Schluter? - RedFlagDeals.com It only takes a minute to sign up. Ultimately, the decision between a Schlter system or a cement board comes down to the particular application and the goals the user has for the floor system. Personnaliser mon exprience l'aide de cookies, Landscape Architects & Landscape Designers, Outdoor Lighting & Audio/Visual Specialists, epoxy or marine paint over greenboard for my shower walls (not tile), Need advice on bathroom remodel - using hardiebacker boards, HELP! I would avoid Hardi, as Avanti is right that it is thirsty. The Kerdi/Daltile TS underlayments do have some valid applications such as in steam shower installations where a bullet proof vapor barrier is required. x 5-ft. and 3 x 5-ft. sheets of cement board are sized for efficient use around bathtubs and showers. It is important to seal any imperfections in the drywall to ensure a long-lasting installation and to minimize water infiltration. Once the primer is completely dry, use a roller or brush to apply a coat of your chosen KERDI membrane adhesive over the entire surface of the wall, overlapping the edges slightly for full coverage. Also - use a good thinset. The main issue caused by non-waterproof cement boards is the eventual warping and damage to the tiles, making it difficult and costly to fix without removing all the tile and starting over. that's home depot homeowner installation method. GoBoard is a kind of backer board because the main elements of a backer board are cement, silica, fiberglass, etc. When installation is done properly, Kerdi membrane offers a waterproof barrier that can protect the plywood below from moisture. An extra layer of thinset is then added to the surface of the cement board to adhere the tiles in place. That means that you do not have to rely on a surface membrane or worry about the board failing if the core is exposed to water. It may take more than 1 beer:). However, you do still have to take care to waterproof the seams and the fastener penetrations to create a waterproof assembly. Why do small African island nations perform better than African continental nations, considering democracy and human development? vegan) just to try it, does this inconvenience the caterers and staff? And second, since its foam, the board is super easy to cut with just a utility knife. See the foam bench and the corners. The main types of cement board you could encounter are Fibre Reinforced Cement (FRC) board and gypsum board. Kerdi Shower Pan and Cement Board Walls - DIY Home Improvement Forum Waterproofing cement board is relatively simple and there are several different waterproofing products available. You peeled it off? Most of the entries in the NAME column of the output from lsof +D /tmp do not begin with /tmp. . It only takes a minute to sign up. Welcome to the site. Step 8: Allow to dry. That's the way us "Tile Guys" do it all the time. We tried adding water to the thinset, we tried using a larger notch trowel, but nothing seems to make the Kerdi stick. Whether or not you need a Kerdi membrane is a factor of use. First, it's super lightweight compared with the rest. One of the major benefits of opting for Kerdi Board over cement board is the ease of installation. Both may be effective substrates, but Kerdi Board boasts significant advantages. To line niche shelves, for instance. link to What Kind Of Paint For Garage Walls? If he did the framing for the shower, then in order to measure for it correctly, he would need to know how thick the tile is so that he can avoid exactly this problem. Additionally, seal the space around any pipes and fixtures that can be found in the shower. We waterproof the outside the hardiboard in 99% of the install with something like redgard. What? My idea is to block in and install the tub in the existing corner, erect the new wet wall, and use hardi-backer to shim the wall out over the tub flange, then apply kerdi over the whole thing.Does kerdi take offense at being installed over hardi? Then you can apply a thin layer of KERDI-FIX to the board, the membrane over top, and use a rolling pin to press it down and ensure a secure bond. If a pipe or faucet ever leaks in the wall this will ruin your shower. bathroom - Kerdi Membrane over cement backerboard - Home Improvement As fiber cement board is similar to regular cement board, it makes sense to choose the one that is cheaper or more readily available. But that doesn't address your question, so it's just a comment, not an answer as such. Overall, waterproofing behind and around shower tile is a critical part of any installation to ensure that the area is adequately protected from water and moisture damage. Thanks. Why does the plumbing rough need to be moved? This will help to extend its lifespan and make sure it looks its best for years to come. I used 1/2 Hardibacker board over the studs and then used the Kerdi membrane over the Hardi. If your going to do the job do it right, and give professional advice pls. Yes, KERDI membrane will stick to cement board. In order to determine which tile underlayment is right for your project, you need to know which issue youre trying to solve whether its preventing subfloor cracks from transferring to the tile, soundproofing, moisture protection, or providing more rigidity to the tile. Install the Schluter Kerdi membrane over the backer board using the correct mortar. However if installed on drywall it is only protecting one side. The cement board core itself is not waterproof, but it can withstand water without falling apart. Why is there a voltage on my HDMI and coaxial cables? After installing your mud bed, make sure it is fully cured before applying Aquadefense. Can I put Kerdi board over drywall? That would tell him where the edge of the framing needs to be. We just went through a learning curve on the Kerdi and Hardi. Not to mention, its warrantied by Schluter, giving you the ultimate peace of mind. I'm guessing he put a 2x6 across for the curb? Why is this the case? Is it plausible for constructed languages to be used to affect thought and control or mold people towards desired outcomes? Most cement-based thin-set mortars are suitable; however, it is important to check the manufacturers instructions to ensure that the product is approved for use with Schluter systems. To create a watertight shower assembly, we installed Schluter's Kerdi membrane over the drywall, just as we would for tile.Write by:. Actually if you watch any pros work (not on crappy shows) on TV you will see them use backer board 99% of the time.