Step 6: Choosing the Next Tile. This flexible polyethylene layer is easy to install and can protect the tile from both cracking and moisture. Additionally, seal the space around any pipes and fixtures that can be found in the 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. It also features fleece webbing that allows for effective anchoring into thin-set mortar. I barely touch it with my hands before going to the tape knife. Ditra is manufactured in a 3'3 width and comes in various roll lengths (54sf, 150sf, and 323 sf). For all the substrates listed in this Handbook (e.g., gypsum board, cement backerboard, etc. Dean, our tile consultant, says glass mat backer board is his first choice due to the ease of installation, cost, and because his workers like it. Step 1: Measure the area. Schluter Kerdi 108 Sq Ft Waterproofing Membrane - amazon.com In . The completed assembly takes the place of more traditional backer board when installed over 3/4-inch wood subfloors. Sheets of glass mat gypsum are made from water-resistant silicone-treated gypsum, reinforced on both sides by fiberglass mats. 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. However if installed on drywall it is only protecting one side. This will ensure that the coating sticks to the cement board. Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. By the time you switch from the RG application to the Kerdi installation, it should be dry. Can Kerdi membrane be installed over painted drywall? How to follow the signal when reading the schematic? What precautions should I take installing tile on a backerboard in an area surrounded by cement? 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. Drywall under Kerdi would have been a better choice. I'm thirsty. If there is no blocking behind the seam, i would just tape prior to installing the membrane, the thinset will fill the seam and embed the mesh. We installed cement board on the walls, and today when we attempted to apply the Kerdi membrane we could not get it to adhere. Is it suspicious or odd to stand by the gate of a GA airport watching the planes? As far as the tile/prep work, you are right that he is shifting the blame. I think I'll try using the thinned mixture of Redgard and then try the Kerdi membrane again. Kerdi really offers very little advantage over hardiboard plus membrane. This allows the cement to properly hydrate, resulting in To ensure the floor is clean, wipe it with a wet sponge. Hi.I have a unique situation. Kerdi membrane over drywall in shower - qkfb.recidivazero.it When installed, Kerdi Board creates a substrate that is level, flat, square, plumb, and dimensionally stable. When installing KERDI with . If you want a cement board, use Durock or Wonderboard. There is definitely skill & planning required to doit right. To install Kerdi Membrane, start by applying Schulter ALL-SET mortar (or similar) to your cement board substrate using a 1/4" x 3/16" V-Notch Trowel. Given the complexity, its easy to see why even experienced tile setters avoid dry-pack mortar and use backer board instead when they can. Calculating probabilities from d6 dice pool (Degenesis rules for botches and triggers). Manufactured by Schluter Systems, Kerdi Board is a multifunctional tile underlayment and construction panel, that can also be implemented for forming bonded waterproof assemblies with tile coverings. What I would be most scared off is the fact that no inside or outside corners appear to have been used. If so, that means breaking up the floor pan. Cement board sucks up the moisture and as a result, the kerdi doesn't always stick as well to cement board. Backerboard plus a waterproofing membrane like Redgard is all that is needed for tub surrounds with thinset then tile. Or will the Kerdi membrane (with seams taped with kerdi band) prevent each board from moving independently? How can I find out which sectors are used by files on NTFS? You still use metal lath, but then mix bags of powder and pour the soupy mix onto the floor. The 30-in. Putting this stuff on walls is difficult and time . Do new devs get fired if they can't solve a certain bug? Foam-core tile backing board has two big advantages over other backer boards. Can I install Kerdi board just on the walls of my shower and use a PVC membrane on the floor? 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. ), Schluter SET, ALL-SET, FAST-SET or an unmodified thin-set mortar is recommended. Firstly, it is important to ensure the wall is adequately prepared and that it is smooth, flat and free of defects. Cement board is the industry standard when it comes to tile substrates and the most preferred among professionals when installing porcelain or ceramic tile. Probably the simplest way is to caulk the gap with 100% silicone or a urethane sealant. In normal residential use I wouldn't worry about it. If installing large format tiles (over 15"), be sure to give the Aquadefense at least 8 hours to cure first. I have to redo my tub surround due to moisture leaks and failing grout. We think it is the cement board (Durock) sucking the moisture out of the unmodified thinset. There's a really great manual (with diagrams) that makes this all easier to understand. I've seen preferences regarding HardieBacker and the cement board products such as Wonder Board. FRC board tends to be more moisture-resistant than gypsum board and is best suited for outdoor projects such as showers or tub surrounds. Installation. Continuing Education for Architects & Designers. You are wise to use a cement board. I think it is engrained in me to do that so I forget to mention it. GoBoard Vs. Kerdi For Your Shower: In-depth Comparison To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Cut the shower tray to size. While cement board is a reliable tile underlayment, it isnt completely waterproof only water-resistant. To prevent those movements from transferring to the tile floor, consider installing an uncoupling membrane between the concrete and tile surfaces. . Schluter says that the Kerdi membrane and tile can be installed over standard gypsum wall board without any problems. link to What Kind Of Paint For Garage Walls? The waterproof membrane isn't a substitute for the substrate. However, if installed on drywall, it only protects one side. What to use to flatten and prep wall before installing Schluter Kerdi membrane for tiling? Welcome to the site. Then cement, sand and water are mixed together to a crumbly consistency and floated over the lath to form a flat surface. Redgard is a similar product. 4. First, it's super lightweight compared with the rest. Slap it up comb it out, leave every ridge tall and perfect. What type of thin-set mortar should I use when installing Schluter-KERDI? Not everyone knows how to do mud and lathe it's so old school plus it wears you out, ive been a setter for 27 yrs and I have yet to go back to one of my showers I installed using perma base or durock, with a liner, i have started using waterproofing such as redguard or aqua-defense. x 96 in. Furthermore, if another trade, such as the shower glass installers, makes a mistake then you'll be . the cost of the tile job. Installing cement board involves placing the boards atop a layer of thinset adhesive, a process known as bedding. #1 - Backer board has nothing to do with HD or any other big box. Schluter-KERDI | Waterproofing (KERDI) | Schluter On the 'rolling pin', it actually wasn't the kitchen kind, but rather a very heavy metal roller DH had from some sort of fabrication table. The perfect fold is tricky and many of my first steam showers where built without the sealed slip joint. It's still applied to cement board. You absolutely need to include some sort of substrate (cement board, green board, regular drywall) with the Schluter-Kerdi waterproofing kit. 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. How do you show the depth of a hole in a drawing? Why do small African island nations perform better than African continental nations, considering democracy and human development? Since the existing wall board will be removed, I'd prefer to go a little extra and install a water proof cement board type base so the tile has a solid substrate even if it were to get wet, such as from a plumbing leak, or from infiltration on an exterior wall (as unlikely as that might be). When it comes to applying KERDI, however, it is advised to use a regular thinset that includes portland cement as its main component. Kerdi board is a kind of waterproofer because these kinds of boards are made of XPS foam. Will be replacing tub shower combination with tiled shower in my home. @DMoore- OK, I agree that with redguard it would be redundant. In the worst case, it's OK to cut the Kerdi, remove the damaged section, scrape up the thinset from the areas, and set a new piece of Kerdi. Gettin' a little delirious. Mike Holmes uses backer on his show. 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. How to install a kerdi membrane over cement backer board - Quora Cement boards are typically capable of withstanding larger amounts of water, while a Schlter system is designed to hold up well only in dry conditions. We tried soaking the cement board and applying the kerdi in small sections. Required fields are marked *. Preparing drywall for KERDI membrane requires a few important steps to ensure a successful application. Why are Suriname, Belize, and Guinea-Bissau classified as "Small Island Developing States"? Wedi Board vs Cement Board vs Kerdi Board - The Ultimate Home Living Blog One of the company says they are going to apply kerdi membrane on the drywall, then tiles onto the kerdi membrane, and as such as cement backboard would not be required. Creative, C'mon over for a beer! The main types of cement board you could encounter are Fibre Reinforced Cement (FRC) board and gypsum board. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Why does the plumbing rough need to be moved? 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. Yes, Schluter membranes can go over cement board. For the floor I make a dry mix mud base and then the Kerdi membrane. Kerdi Board Vs. Cement Board (What's The Difference?) - Home Mindset Unlike cement boards, you can bend this material without it breaking. 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 means that even if your waterproofing system leaks, the cement board will remain intact. It only takes a minute to sign up. Is a PhD visitor considered as a visiting scholar? Sweeby-Can you clarify- I undestood that the thinset would tend to dry out from the thirsty hardi or skim over from the air; so how does booking the Kerdi help with the first? This creates a strong, waterproof tile backer that also functions as an uncoupling membrane. A place where magic is studied and practiced? Personally, I like standard drywall. . craft paper or plastic is great if the inspector wants it but it is (should be) doing nothing for a tub surround that has HB/redgard/thinset/tile. Since my guys and I will be doing this for the first time next week, I 'd like to take advantage of your 'learning curve.' 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. Schluter Kerdi 108 Sq Ft Waterproofing Membrane - amazon.com Moisture resistant can cause similar problems, and there is absolutely no advantage to it. Best Cement Boards for the Shower - The Spruce MAPEI makes products for each step of the remodel process, giving you a single source solution, and only one phone number to call if you need assistance! Step 2: Determine the room's center. I just a few weeks ago put kerdi on top of hardi-board in my shower and it was PAINFUL! ", Signed,Never Hung Kerdi A Day In Her Life. Wedi showers feature a pre-sloped base that is already installed. Why is there a voltage on my HDMI and coaxial cables? The difference between the phonemes /p/ and /b/ in Japanese. The Schlter system tends to be more durable than a cement board, but it also depends on the particular application and the weather. For indoor projects and gypsum board, thinset with a latex acrylic modifier is ideal. Best substrate for kerdi membrane - nsbu.treviso-aug.it Yeah it seems that the only products that will be compatible with cement board and the kerdi membrane are bostik ditra-set and schluter all-set (or one of schluters other products). Furthermore, if you're working in an older home KERDI-BOARD fits better than cement board in odd spaces. It looks like you have Kerdi installed on the floor and not Kerdi Board. there should be a small gap between the backer board and the tub. Additionally, if the cement board isnt waterproof, it can also cause mold and mildew issues, as well as dry wall damage from the moisture seeping through. Plus, most self-leveling formulas harden very fast, so you have to plan carefully so you can mix and pour quickly. We are DIYers who have already remodeled one bathroom successfully, but this is our first time using The Schluter shower system. I trust it and have never had a callback. 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. Je peux rejeter les cookies non essentiels en cliquant sur Grer mes prfrences . Kerdi-Shower-T/-TS/-TT is a prefabricated sloped shower tray with integrated Kerdi waterproofing. that's home depot homeowner installation method. Its essential to protect surrounding wall and floor surfaces from water or moisture damage that can occur in these areas. This allows the cement to properly hydrate, resulting in a strong, dense bond coat. Asking for help, clarification, or responding to other answers. Why unmodified thinset with kerdi? - qyvxl.dixiesewing.com It allows you to easily and quickly create tile-ready elements in bathtub surrounds and platforms, vanities, showers, shelving, and much more. Once this is done, continue the installation by following the directions for the particular Kerdi product being used. Cement board is readily available and relatively inexpensive (about $10 for a 3 x 5-ft. sheet). Set ceramic and stone tile over the KERDI membrane with unmodified thin-set mortar, including large format tiles. Additionally, the drywall should be primed with a latex primer before applying the Kerdi membrane. But there are downsides. Do You Need Uncoupling Membrane Over Concrete? - On Secret Hunt 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! It is important to overlap the edge of the membrane so that it covers slightly more than half of the drywall behind it. The core isnt waterproof, but it can withstand getting wet without falling apart, so even if your waterproofing system leaks, the board will stay intact. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Houzz utilise des cookies et d'autres technologies de suivi similaires pour personnaliser mon exprience utilisateur, me proposer du contenu pertinent et amliorer ses produits et services. The Kerdi membrane should be applied with the standard procedure, using a hogg brush or a notched trowel to spread the thin-set mortar and a roller to ensure appropriate adhesion. We are still most comfortable with full plumber's pan over the curb, including glue-on preformed corners, and also a second layer (usually Kerdi but can be paint-on) on top of CBU wrap over curb. It costs more but it;s worth it for the ease of install IMO. Will use the Schluter Shower system. Kerdi Board vs. Cement Board: What Are The Major Differences? Step 8: Allow to dry. This is necessary to ensure that the membrane will adhere properly to the drywall. Cement board is a heavy mess compared to drywall, and drywall is a heavy mess compared to Kerdi Board. One thing I do like fibercement (Hardie) for is when I need thin strips of cement board. Overall, putting Kerdi over regular drywall can be done, with the proper steps in place to properly install the membrane and its components. vegan) just to try it, does this inconvenience the caterers and staff? Schluter approves their waterproof Kerdi membrane over drywall. Install the Schluter Kerdi membrane over the backer board using the correct mortar. Think about movement. Some being easier to work with than others. You probably have to go to a big box store's special order desk or find a specialty tile supplier to find it. They are absorbed into the surface material and help keep moisture away from the substrate surface. Let's start! Cement board is known to be very heavy and somewhat difficult to cut. This thread is 9 years old and it's the Hardi board that's thirsty not the Kerdi. . This liquid waterproofing solution does more than keep water away, it also promotes tile adhesion and prevents cracking. It fell right off? For the floor I make a dry mix mud base and then the Kerdi membrane. ps, now that you don't need it anymore you can throw that useless cheap piece of crap magnesium float my way. I would fear leaks in all corners of this shower. I don't want to use the Ditra membrane product but rather tiles directly over the cement boards. Learn more about Stack Overflow the company, and our products. This feature makes building the base structure much easier and more cost . I have used kerdi, and I have applied it over cement board. @JimmyFix-it - hardiboard is not really porous unless it is completely saturated. Euler: A baby on his lap, a cat on his back thats how he wrote his immortal works (origin? Keep in mind, that, just to be safe, most professionals choose to install a waterproofing membrane on top of the cement board when installing in wet locations like tub surrounds or showers.