Because it can let some moisture wick through it, you have two choices: put a moisture barrier behind it to protect the structure, or, waterproof the front of it. This allows the cement to properly hydrate, resulting in a strong, dense bond coat. Whether youre installing tile on a floor, wall, or countertop, choosing the right type of substrate, or underlayment, is critical to preventing breaks and cracks in both the tile and the grout. Kerdi-Board panels allow the installer to prepare and create a broad range . Both may be effective substrates, but Kerdi Board boasts significant advantages. We sponge water onto the cement board. Ditra is a 1/8-inch thick polyethylene membrane with a layer of anchoring fleece on the underside and a grid of square cavities on top. There's a really great manual (with diagrams) that makes this all easier to understand. It is easier to cut than cement board, it is mold resistant, and it has a built-in moisture barrier. We tried soaking the cement board and applying the kerdi in small sections. On top of that, fiber cement board is even more brittle than standard cement board, so you have to be extra careful to keep screws at least an inch from the edge to avoid breaking the board. First Kerdi can be installed on drywall or cement board. x 33 ft. Waterproofing Membrane: Kerdi-Board 1/2 in. Hardie board is a cement-based siding product that is water-resistant, but not waterproof.
If you choose to use Aquadefense as a shower pan liner, be sure to continue it up the walls at least 6", tying into your waterproofing on the walls. Like the example above. Also, apply the acrylic mastic between the Create curved designs around pipes or columns using the vertically-grooved KERDI-BOARD-V, or use L-shaped KERDI-BOARD-E panels to enclose similar. A good rule of thumb is 24 hours per inch of thickness, then one more day on top of that to be sure. Cement board sucks up the moisture and as a result, the kerdi doesn't always stick as well to cement board. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[728,90],'remodelormove_com-mobile-leaderboard-1','ezslot_24',166,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-mobile-leaderboard-1-0');If cement board is not waterproof, it can negatively impact the integrity of the tile that is installed on top of it, and can lead to a variety of issues. In normal residential use I wouldn't worry about it. 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. The curb doesn't have to be any wider than a 2x4. Can you remove tile from Kerdi membrane? Schluter-KERDI is a pliable, sheet-applied, bonded waterproof membrane and vapor retarder with limited crack-bridging capabilities. Your real issues are the lack of proper corners on this shower. I think it is engrained in me to do that so I forget to mention it. With that said, lets take a look at the importance of choosing the right tile substrate, the options you have, and which tile underlayment material you should choose Kerdi Board or cement board? 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 colour is different. It is also essential that cement board joints and fasteners be sealed and waterproofed with the Kerdi Fix sealant to help prevent water from leaking into the wall and floor cavities. Fiber cement board is a variation of cement board that is made from compressed cement and sand and reinforced with wood fibers throughout. Sheets of glass mat gypsum are made from water-resistant silicone-treated gypsum, reinforced on both sides by fiberglass mats. You provide the pitch during the tile set. 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. http://www.schluter.com/schluter-us/en_US/Shower-System/KERDI-SHOWER-KIT/Schluter%C2%AE-KERDI-SHOWER-KIT/p/KERDI_SHOWER-KIT, We've added a "Necessary cookies only" option to the cookie consent popup. Connect and share knowledge within a single location that is structured and easy to search. However, if installed on drywall, it only protects one side. Keep in mind that most tile setters err on the side of caution and brush a waterproofing membrane on top of cement board when it is in wet areas like showers or tub surrounds. Putting this stuff on walls is difficult and time . Why are Suriname, Belize, and Guinea-Bissau classified as "Small Island Developing States"? If installing large format tiles (over 15"), be sure to give the Aquadefense at least 8 hours to cure first. A complete schluter shower kit is like $700-$900 depending on the size - this includes the pitched foam shower pan. You don't want to block off the end of the air chanel and trap half a sheet worth of air under there.-Not paying attention to the direction of my knife. "thanks in advance :-) I know so little about this stuff, but when I watch videos (made by schluter-kerdi) everything looks so tidy and perfect - maybe that's not realistic'''" - Lisa Jasper It should look better than that and it's hard to tell but the wall stud spacing looks extreme and more than 16" I could not see if the screw heads where covered in the photos and in the one picture you can see that the screw and washer fitting where not covered. Answer (1 of 3): Schluter recommends applying Kerdi over drywall for walls, however, my local building code will not permit this practice - the local building code requires cement backer on the walls of a shower enclosure, therefore, I have done this successfully many times. Cement board, Wedi board, Kerdi board, Hardibacker, Densshield, Durock, Permabase, or Wonder board . 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. Let the mortar dry for 24 hours then test the shower. It is designed to form a waterproof layer between cement board and tiles, helping create a watertight installation. Houzz Pro: One simple solution for contractors and design pros, surfer thanked Avanti Tile & Stone / Stonetech. Cement board is typically used in wet areas, such as bathrooms and areas with a lot of moisture, because it is waterproof and provides a level of protection from water damage and long-term moisture exposure. 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. 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. In a perfect job, it will waterproof. x 60 in. Depending on your project and the specific cement board you are using, you will want to select a thinset appropriate for both.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[468,60],'remodelormove_com-large-leaderboard-2','ezslot_15',158,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-large-leaderboard-2-0'); The two primary criteria to help guide your selection are the type of cement board you are using and whether you are installing it indoors or outdoors. Yes, it is recommended to waterproof cement board, especially if it is going to be used in exterior settings or in places where it will be in contact with water. Once youre sure that the membrane is completely dry, you can then move forward with tiling. The type of bonding mortar used to apply KERDI must be suitable for the substrate and must penetrate and engage the membrane fleece. 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. The thickness of the tile is important, and should be known, but not because it changes the method of building. Yes, KERDI membrane will stick to cement board. This flexible polyethylene layer is easy to install and can protect the tile from both cracking and moisture. Bulk update symbol size units from mm to map units in rule-based symbology. Various products can be used to waterproof shower walls such as water-resistant drywall and cement backer boards. vegan) just to try it, does this inconvenience the caterers and staff? He would take his rough opening measurement and subtract the thicknesses of the tile, the cement board, and in his unique install method the purpleboard. Allow the primer to dry completely before proceeding with the KERDI installation. 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! Make sure the floor is level in the shower. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Do I have to use Kerdi tape with Ditra membrane? More waste, yes, but I think you have to have a LOT of practice to hang those huge sheets like mongo does. see Prop 65 WARNINGS. Kerdi Board vs. Cement Board. Your Get free, zero-commitment quotes from pro contractors near you. Jessica considers herself a home improvement and design enthusiast. There are many different types of underlayment to choose from, but they all serve the same purpose. When installing KERDI with . The bag says Mapei floortile mortar, it was the only unmodified thinset at our hardware store. This will ensure that the coating sticks to the cement board. Allow the adhesive to cure for the amount of time recommended by the adhesives manufacturer. Required fields are marked *. 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. Kerdi Board is expensive, but I can justify it because it saves time, and it's a joy to use. If a pipe or faucet ever leaks in the wall this will ruin your shower. I also used the Kerdi drain. Both Kerdi Board and cement board are designed to smooth out uneven spots on the installation surface, create an unbending layer that wont flex underfoot, and also provide a waterproof barrier. 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.' @JimmyFix-it - You are right. Though, each product comes with its own individual characteristics, and pros and cons. Kerdi-Shower-T/-TS/-TT is a prefabricated sloped shower tray with integrated Kerdi waterproofing. there should be a small gap between the backer board and the tub. The cement board needs to be clean, free of debris, and dry. I usually use Durock. The kerdi membrane will probably do the same, and its regularly installed over drywall which is probably less stable. Cement board is the industry standard when it comes to tile substrates and the most preferred among professionals when installing porcelain or ceramic tile.