kerdi membrane over cement board

For all the substrates listed in this Handbook (e.g., gypsum board, cement backerboard, etc. #3 This is a DIY site. It is designed to form a waterproof layer between cement board and tiles, helping create a watertight installation. Probably the simplest way is to caulk the gap with 100% silicone or a urethane sealant. True cement board (Durck, Wonderboard) is my first choice as a tile or Kerdi backer. Install the Schluter Kerdi membrane over the backer board using the correct mortar. Do You Need Uncoupling Membrane Over Concrete? - On Secret Hunt ), Minimising the environmental effects of my dyson brain, Finite abelian groups with fewer automorphisms than a subgroup. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. The foam core surrounded by synthetic cloth on both sides and adhered with resin glue is. Is it suspicious or odd to stand by the gate of a GA airport watching the planes? I appreciate your help and your quick response. Once the wall is prepped, use a primer that is compatible with the KERDI membrane so that it will properly adhere to the wall. Then you can apply a thin layer of KERDI-FIX to the board, the membrane over top . In a perfect job, it will waterproof. The product involves an extruded polystyrene foam panel, with specialized reinforcement materials on both sides. Here is a video off the Schluter-Kerdi website that describes how to apply the waterproof membrane on top of the substrate (gypsum board in this case): http://www.schluter.com/schluter-us/en_US/Shower-System/KERDI-SHOWER-KIT/Schluter%C2%AE-KERDI-SHOWER-KIT/p/KERDI_SHOWER-KIT. Kerdi membrane is a waterproofing material that is designed to be used in wet areas such as bathrooms and showers before tiles are installed. Important to overlap seams in a shingle method. #2 - Your suggestion has plenty of merit though. It installs with screws, then you tape the joints & screw holes and install your tile. Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. Good luck with your project. Connect and share knowledge within a single location that is structured and easy to search. Redgard is a similar product. The big issue with cement board is that the thinset will skin over really quickly. If you want to go to the extra effort of putting the membrane over drywall, there is no need to use greenboard. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[728,90],'remodelormove_com-box-3','ezslot_2',173,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-box-3-0');Yes, you can put Kerdi membrane over cement board. If you can avoid that, the demo would be ~easy enough to maybe have some friends who'd work for beer come over and help you knock it out. By: Author Olin Wade (Remodel or Move Stuff). We waterproof the outside the hardiboard in 99% of the install with something like redgard. I trust it and have never had a callback. If you ensure that silicone goes in and that the thin-set and grout do not bind there you should be good to go. She grew up surrounded by constant home improvement projects and owes most of what she knows to helping her dad renovate her childhood home. This liquid waterproofing solution does more than keep water away, it also promotes tile adhesion and prevents cracking. Fixing that is not that easy though. 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. You are telling someone "to have" an artistry that not only takes art skills, knowing how to mix mortar for different situations, and a good amount of practice. The thin-set mortar should be mixed to a fairly dry consistency and then spread on the surface with a 1/4 inch square notch trowel. The Ditra uncoupling design is lightweight, durable, and minimizes the possibility of cracked tile and grout. My understanding is that Schluter-Kerdi, being a sheet topical membrane, recommends just going with regular drywall instead of cement board but you can certainly use cement board as the substrate. Anytime Mongo. Prime first to create a flat, uniform surface that is free of dust, grease and other debris. Our thinset was more watery than the videos, but it still managed to dry out quickly, even in the time it takes to apply the small corners in our shampoo niche. Regardless, cement board is a great, trusted tile substrate that will work well on both walls and floors. Cement board is readily available and relatively inexpensive (about $10 for a 3 x 5-ft. sheet). . We tried soaking the cement board and applying the kerdi in small sections. And second, since its foam, the board is super easy to cut with just a utility knife. It may take more than 1 beer:). However if installed on drywall it is only protecting one side. The shower is ready for tile. Will use the Schluter Shower system. This means that even if your waterproofing system leaks, the cement board will remain intact. x 33 ft. Waterproofing Membrane: Kerdi-Board 1/2 in. Let the mortar dry for 24 hours then test the shower. Once this is done, continue the installation by following the directions for the particular Kerdi product being used. This will help you achieve the best results and ensure the longevity of your project. Can you put Kerdi membrane over cement board? 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. Making statements based on opinion; back them up with references or personal experience. Kerdi membrane prevents water damage and mold development. 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. This will help to ensure that all drywall is completely covered. It's a lightweight polystyrene board faced with Kerdi that comes in various thicknesses that you can use in place of drywall or cement board. Kerdi board vs. Membrane vs. Other for Shower - DIY Home Improvement Forum Let's start! It is important to waterproof Hardie board to make it more water-resistant, as well as to protect the materials from the elements. Kerdi Membrane Over Greenboard (Is It Recommended?) Hardibacker is a VERY "thirsty" material that sucks the moisture out of the mortar VERY quickly and I don't like it. Kerdi board, on the other hand, is an extruded polystyrene foam panel. Kerdi Board Vs. Cement Board (What's The Difference?) - Home Mindset Cement board is particularly vulnerable to water damage, so waterproofing can help protect it and help it last longer. How did this project turn out? Is this overkill? Here's how to get it right the first time, If you've got a steady hand, a few easy-to-find supplies and patience, you can install a tile backsplash in a kitchen or bathroom, Step 4 in swapping your tub for a sleek new shower: Pick your waterproofing materials and drain, and don't forget to test, Work with your contractors and installers to ensure a safe, stylish curb that keeps the water where it belongs, Get the benefits of a time-honored ritual without firing up the coals, thanks to easier-than-ever home steam systems, Landscape Architects & Landscape Designers, Outdoor Lighting & Audio/Visual Specialists, Out With the Old Tile: 8 Steps to Prep for Demolition, Convert Your Tub Space Into a Shower Waterproofing and Drainage, Steam Showers Bring a Beloved Spa Feature Home. Mike Holmes uses backer on his show. Using Kolmogorov complexity to measure difficulty of problems? Kerdi Shower Pan and Cement Board Walls - DIY Home Improvement Forum What's the difference between a power rail and a signal line? This will help to extend its lifespan and make sure it looks its best for years to come. We apply the thinset the recommended trowel, can't remember what size off the top of my head, in small sections and by the time my husband hands my the piece of membrane the thinset is not skinned over but certainly dry. Step 3: Apply Thinset. Some being easier to work with than others. Finally, make sure to select a thinset that is appropriate for the job, check the manufacturers recommendation, and always follow the instructions on the product label. This allows the cement to properly hydrate, resulting in To ensure the floor is clean, wipe it with a wet sponge. Yes, Schluter membranes can go over cement board. Is a PhD visitor considered as a visiting scholar? It's still applied to cement board. There are numerous ways to do this. Why unmodified thinset with kerdi? - qyvxl.dixiesewing.com This will ensure that the coating sticks to the cement board. This will include installing its components, such as drain plate and drain collar, as well as Kerdi Band for further protection of seams and corners. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. I think it is engrained in me to do that so I forget to mention it. Greenboard is the same as regular drywall. Kerdi Board vs. Cement Board: What Are The Major Differences? As such, many homeowners and professionals find themselves wondering whether Kerdi Board or cement board is the better tile substrate. To create a watertight shower assembly, we installed Schluter's Kerdi membrane over the drywall, just as we would for tile.Write by:. The colour is different. An additional layer of sealant can also be applied on the seams for extra protection and water resistance. A good rule of thumb is 24 hours per inch of thickness, then one more day on top of that to be sure. Can you put KERDI over regular drywall? - remodelormove.com Additionally, the use of modified thinset with KERDI could lead to cracks and other issues down the line as the modified thinset can shrink and pull away from the KERDI membrane over time. The bag says Mapei floortile mortar, it was the only unmodified thinset at our hardware store. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Step 2: Determine the room's center. The type of bonding mortar used to apply KERDI must be suitable for the substrate and must penetrate and engage the membrane fleece. Needless to say, the drywall turned to mush. If you preorder a special airline meal (e.g. Once the membrane is in place, it can be sealed and reinforced with Kerdi-Fix sealant, Kerdi band, and Kerdi-Drain for added waterproofing strength. there should be a small gap between the backer board and the tub. What to use to flatten and prep wall before installing Schluter Kerdi membrane for tiling? We tried adding water to the thinset, we tried using a larger notch trowel, but nothing seems to make the Kerdi stick. Unlike cement boards, you can bend this material without it breaking. I can take a bit of it off the wall and roll it into a ball. Finally, use a roller or brush to ensure that the membrane is secure and has no wrinkles or air bubbles. It doesn't matter but you absolutely need to use both a substrate and a waterproofing membrane. When it comes to selecting thinset for cement board, there are a few important factors to consider. Schluter says that the Kerdi membrane and tile can be installed over standard gypsum wall board without any problems. Kerdi board is a kind of waterproofer because these kinds of boards are made of XPS foam. If you want a cement board, use Durock or Wonderboard. The main types of cement board you could encounter are Fibre Reinforced Cement (FRC) board and gypsum board. What I would be most scared off is the fact that no inside or outside corners appear to have been used. Too little, and the kerdi will never show you gray, no matter how you sweat. What was the indicator that let you know that spritzing was not enough, and that you needed to 'sponge' the Hardi? The 1/4-inch-thick board is typically used on floors and countertops. What type of thin-set mortar should I use when installing Schluter-KERDI? Kerdi's systems are fairly reputable. What can a lawyer do if the client wants him to be acquitted of everything despite serious evidence? 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. When applying thin-set mortar, the manufacturers instructions should be followed closely. After priming, use an approved adhesive to adhere the KERDI membrane to the drywall, making sure the edges are well sealed and joints are tight.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[468,60],'remodelormove_com-medrectangle-4','ezslot_12',156,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-medrectangle-4-0'); A successful installation of KERDI requires well-prepared surfaces and a proper application, so take the time to properly prime the drywall before installation. How do I align things in the following tabular environment? 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. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[580,400],'remodelormove_com-large-mobile-banner-1','ezslot_17',164,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-large-mobile-banner-1-0');As an added precaution, you may want to consider to adding a water-resistant layer afterwards, such as a caulking or flashing tape.

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