With Kerdi Board you get to enjoy an effective product that is lightweight, easy to cut, waterproof, and leaves behind no dust! 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. If you want added info there's an old Kerdi thread here. 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. 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. Cement board and grout are not water proof, if there's Kerdi no moisture is ever going to be able to get behind it. Furthermore, if you're working in an older home KERDI-BOARD fits better than cement board in odd spaces. Find the website that's made specifically for you. When I tried putting up the first sheets, which were only 36" x 39", and even though I had SOAKED the hardi, to the point water was pooling on the floor, the thinset was already drying before I got the Kerdi up, and I couldn't get it to adhere properly no matter how hard I tried. "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. Firstly, it is important to ensure the wall is adequately prepared and that it is smooth, flat and free of defects. 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. Another advantage is that the polyisocyanurate core of foam boards is waterproof. To line niche shelves, for instance. I've never had a failure. First, it's super lightweight compared with the rest. Additionally, all seams should be sealed with Kerdi Fix and covered with fleece. I just a few weeks ago put kerdi on top of hardi-board in my shower and it was PAINFUL! They are available in thicknesses of 3/16, 3/8, 1/2, 3/4, 1, 1-1/2, and 2 (5, 9, 12.5, 19, 25, 38, and 50 mm). The taping knife at a low angle makes an enormous difference, and I'm very grateful for that hint. Slap it up comb it out, leave every ridge tall and perfect. Installation is simple- just trowel a layer of thin-set adhesive on the floor and embed the mat in it, then fill the cavities with thin-set. To ensure that the Kerdi is completely dry prior to tiling, inspect the inside of the membrane for any signs of moisture or condensation. 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. This means that even if your waterproofing system leaks, the cement board will remain intact. 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. They are absorbed into the surface material and help keep moisture away from the substrate surface. Can you remove tile from Kerdi membrane? 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. However, if installed on drywall, it only protects one side. Kerdi can be installed first on drywall or cement board. Additionally, it is important to waterproof cement board before tiling, as the grout and tiles can help keep the board watertight. Using modified thinset on KERDI can be tricky and in some cases, it can cause issues. See the foam bench and the corners. 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. More waste, yes, but I think you have to have a LOT of practice to hang those huge sheets like mongo does. Once youre sure that the membrane is completely dry, you can then move forward with tiling. It worked well - just like wallpapering. In my. Needless to say, the drywall turned to mush. All shower/tub areas should have concrete board (I prefer hardiboard). Can be cut to size easily using a utility knife. There's a really great manual (with diagrams) that makes this all easier to understand. 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. Moisture resistant can cause similar problems, and there is absolutely no advantage to it. I'm guessing he put a 2x6 across for the curb? Go with smaller bags or only mix half. There are many different types of underlayment to choose from, but they all serve the same purpose. RedGard can be used on a wide range of interior and exterior surfaces. Kerdi does admit that you can use cement board. Here are the fundamentals of tile installation over cement board. The waterproof membrane isn't a substitute for the substrate. And second, since it's foam, the board is super easy to cut with just a utility knife. When installing Schluter Kerdi Membrane over cement backerboard: Should I use Alkali Resistant Mesh Tape and thinset on the seams of the backer board (for long term durability to prevent each board moving independently thus preventing cracking) prior to installing the Kerdi membrane. Will use the Schluter Shower system. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()); Your email address will not be published. This will help to extend its lifespan and make sure it looks its best for years to come. It allows you to easily and quickly create tile-ready elements in bathtub surrounds and platforms, vanities, showers, shelving, and much more. Yes, Hardie board needs to be waterproofed. The perfect fold is tricky and many of my first steam showers where built without the sealed slip joint. Following the instructions for the product being used and ensuring that all of the necessary steps are followed will help to ensure a successful installation. ", Signed,Never Hung Kerdi A Day In Her Life. Been clankin' away at this computer for a couple of hours now, guys. When installed, Kerdi Board creates a substrate that is level, flat, square, plumb, and dimensionally stable. I circled one area, but there are lots of these edges." - Lisa Jasper The Kerdi band should be smooth and flat - not wavy/ "3) there is no membrane of waterproofing on the hardboard across from the "wet wall" after 5 1/2 feet up. I can take a bit of it off the wall and roll it into a ball. 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). How long should I wait after painting on the Redgard before I try to reapply the membrane? Additionally, you can use KERDI-BAND around corners, seams, and joints to help with a waterproof installation. Its essential to protect surrounding wall and floor surfaces from water or moisture damage that can occur in these areas. KERDI features a modified polyethylene (PEVA) core with non-woven polypropylene on both sides to anchor the membrane in the thin-set mortar. 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. When installing Schluter Kerdi Membrane over cement backerboard: Should I use Alkali Resistant Mesh Tape and thinset on the seams of the backer board (for long term durability to prevent each board moving independently thus preventing cracking) prior to installing the Kerdi membrane. Cement board is a heavy mess compared to drywall, and drywall is a heavy mess compared to Kerdi Board. 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 . Take care to cut the KERDI membrane to the appropriate size and apply it to the wall, ensuring that it is properly adhered and that the edges are sealed with KERDI sealant. Additionally, the drywall should be primed with a latex primer before applying the Kerdi membrane. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[580,400],'remodelormove_com-leader-2','ezslot_21',165,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-leader-2-0');Once the seams are sealed, lay down a waterproof coating to the floor and walls of the shower space. I used 1/2 Hardibacker board over the studs and then used the Kerdi membrane over the Hardi. 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. Schulter Ditra is manufactured by Schluter Systems and is a 1/8 thick polyethylene uncoupling membrane that is specifically designed for tile installations. Bathroom closets are often catch-alls for anything and everything remotely related to self-care. Kerdi Board panels have a number of other advantages: they can be cut to size using an ordinary utility knife, can be glued or screwed into place, and are very lightweight. To get the most protection from the cement board, it should be installed in a way that ensures it is waterproof, in addition to being secured properly with the right adhesive and screws. rev2023.3.3.43278. Once all that is completed and the Aquadefense has dried, you can install your tile with a polymer modified mortar meeting the ANSI requirements of A118.4 or A118.11. They can be installed on any type of support and can even be used to create partitions, with no structural support required. Tile can be installed directly over Kerdi-Board using the thinset method; For use with ceramic and natural stone tile; Return Policy; California residents. You are wise to use a cement board. One of the major benefits of opting for Kerdi Board over cement board is the ease of installation. The kerdi membrane will probably do the same, and its regularly installed over drywall which is probably less stable. After installing your mud bed, make sure it is fully cured before applying Aquadefense. That would tell him where the edge of the framing needs to be. I also used the Kerdi drain. 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. 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. There is definitely skill & planning required to doit right. WATCH HERE: https://www.youtube.com/watch?v=3TRLd2HYhbU&list=PLO47JMsdYGrkxM_ZkOc3lMnsVhTqj80bB#justdoityourself #lovingit #p. 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. I think it is engrained in me to do that so I forget to mention it. 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. Once the wall is prepped, use a primer that is compatible with the KERDI membrane so that it will properly adhere to the wall. Why are physically impossible and logically impossible concepts considered separate in terms of probability? Wedi showers feature a pre-sloped base that is already installed. 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. 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. What is a word for the arcane equivalent of a monastery? Fiber cement board is available in 1/4-inch and 1/2-inch thicknesses. Kerdi is not a user friendly product, and when you shrink your working time down it is downright stressful. If you ensure that silicone goes in and that the thin-set and grout do not bind there you should be good to go. Also - use a good thinset. Ratings (91) (5) (91) (3 . 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. A place where magic is studied and practiced? 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. I would get someone else. The benefit of using kerdi is we can lay it over drywall, We've added a "Necessary cookies only" option to the cookie consent popup. First, felt paper is stapled to the floor and covered with expanded metal lath. ".1) is is okay to use kerdi board instead of ditra on the floor? I think I'll try using the thinned mixture of Redgard and then try the Kerdi membrane again. A.Sean Gerolimatos, technical services manager for Schluter Systems, responds: With a few exceptions, unmodified thinset mortar is required for setting ceramic and stone tile over Kerdi membranes (800/472-4588, www.schluter.com ), as well as for bonding overlapped seams and connections to Kerdi drains.