But there are downsides. Kerdi can even be installed over drywall. The problem is on the back side of the drywall, which is not protected. The Ditra uncoupling design is lightweight, durable, and minimizes the possibility of cracked tile and grout. there should be a small gap between the backer board and the tub. Schluter-KERDI | Waterproofing (KERDI) | Schluter Its important to note that Kerdi membrane is not a structural base layer, so plywood should be installed and reinforced as necessary based on load requirements. 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! ".1) is is okay to use kerdi board instead of ditra on the floor? The completed assembly takes the place of more traditional backer board when installed over 3/4-inch wood subfloors. Builder saying he doesn't want to put my trim tile in here. Needed to interject a little "amateur humor. Moisture resistant can cause similar problems, and there is absolutely no advantage to it. The Kerdi is essentially replacing the backerboard. Maybe try another brand of thinset? On the other hand, a Schlter system offers improved thermal insulation, which can help to reduce heating costs. Significantly more time and effort is required to ensure a quality bond when using a modified thinset adhesive with KERDI, and for this reason, it is usually not recommended. Tile can be installed directly over Kerdi-Board using the thinset method; For use with ceramic and natural stone tile; Return Policy; California residents. Hardibacker is a VERY "thirsty" material that sucks the moisture out of the mortar VERY quickly and I don't like it. This liquid waterproofing solution does more than keep water away, it also promotes tile adhesion and prevents cracking. Ceramic Tile Advice Forums - John Bridge Ceramic Tile, http://www.youtube.com/watch?v=G4HjHT6_cUo, http://www.youtube.com/watch?v=wEt6irjJCI0, My master suite addition & full bath to 1/2 bath renovation. It fell right off? ", Signed,Never Hung Kerdi A Day In Her Life. Shouldn't take too long, maybe an hour or so. Kerdi Shower Pan and Cement Board Walls - DIY Home Improvement Forum Can I install Kerdi board just on the walls of my shower and use a PVC membrane on the floor? Schluter approves their waterproof Kerdi membrane over drywall. On a vertical surface, very little moisture . vegan) just to try it, does this inconvenience the caterers and staff? builder, anti-builder, rebuilder -- Retired Moderator. see Prop 65 WARNINGS. I appreciate your help and your quick response. 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. Kerdi Board vs. Cement Board: What Are The Major Differences? Without an underlayment, even the slightest movement of the subfloor can result in cracking of the tile and crumbling of the grout lines. Will use the Schluter Shower system. Depending on factors such as room temperature, humidity, and ventilation in the area, this could take anywhere from 1 to 3 days. A good rule of thumb is 24 hours per inch of thickness, then one more day on top of that to be sure. It could take longer if the space is particularly wet or humid. "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. This feature makes building the base structure much easier and more cost . Allow the primer to dry completely before proceeding with the KERDI installation. While cement board and grout are not waterproof, Kerdi is and can even be directly installed over drywall. ! This is a bit difficult to answer as it depends on the particular application for the floor system. 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. 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. You provide the pitch during the tile set. Make sure to use multiple coats, if necessary. Waterproofing cement board is relatively simple and there are several different waterproofing products available. Now there's nothing particularly wrong with fiber-cementit's just not my first choice. What type of thin-set mortar should I use when installing Schluter-KERDI? 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 . 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. A quality underlayment will also serve as a waterproof barrier between the subfloor and the tile surface. Overall, putting Kerdi over regular drywall can be done, with the proper steps in place to properly install the membrane and its components. 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. rev2023.3.3.43278. Can you put Kerdi membrane over cement board? How to Install Kerdi Membrane - YouTube What to use to flatten and prep wall before installing Schluter Kerdi membrane for tiling? Yes, Schluter membranes can go over cement board. 3. I don't want to use the Ditra membrane product but rather tiles directly over the cement boards. However, the answer you provided above suggests that the OP could omit a waterproof membrane, that I. I just a few weeks ago put kerdi on top of hardi-board in my shower and it was PAINFUL! When cleaning thinset off of Schluter membranes, the manufacturer recommends using a wet sponge and taking care to avoid any scoring or inconsistencies on the surface of the membrane. modified thin-set mortar is not recommended to set ceramic and stone tile, including large format tiles, over the KERDI membrane. The best answers are voted up and rise to the top, Not the answer you're looking for? About an argument in Famine, Affluence and Morality, Acidity of alcohols and basicity of amines. If installing large format tiles (over 15"), be sure to give the Aquadefense at least 8 hours to cure first. Kerdi membrane prevents water damage and mold development. While cement board may be the most common and widely-known tile substrate, Kerdi Board is giving it a run for its money. Kerdi Questions and Answers - Kennedy Kitchens & Baths Is it plausible for constructed languages to be used to affect thought and control or mold people towards desired outcomes? Modified thin-set mortars must dry for the polymers to coalesce and form a hard . PROBLEM SOLVED for Tub Flange when Installing Cement Board and Tile. Underlayment is designed to smooth out uneven areas of the subfloor and form a rigid layer that prevents the flooring from bending. 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. Needless to say, the drywall turned to mush. It allows you to easily and quickly create tile-ready elements in bathtub surrounds and platforms, vanities, showers, shelving, and much more. All it takes is the right preparation. Ready to join the 100,000+ homeowners matched with pros? Learn more about Stack Overflow the company, and our products. Find the website that's made specifically for you. Drywall under Kerdi would have been a better choice. Why do small African island nations perform better than African continental nations, considering democracy and human development? We mixed the thinset, it wasn't as smooth as the utube video, but it was close, and we gave it ten minutes.
Once youre sure that the membrane is completely dry, you can then move forward with tiling. 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. Hardie board is thirsty, but that's way too fast. The colour is different. Installation instructions vary depending on the type of Kerdi membrane being used, but typically the membrane is applied directly to a clean, dry plywood surface that is free from dust, dirt, and other debris. . Can be cut to size easily using a utility knife. I hang Kerdi on cement board and fibercement board all the time. Caulk the gap. This makes Kerdi Board suitable for a wide variety of interior applications, including kitchen countertops. A complete schluter shower kit is like $700-$900 depending on the size - this includes the pitched foam shower pan. Finally, it is important to remember that any thin-set that has been exposed to moisture must be replaced. If you want a cement board, use Durock or Wonderboard. If done according to manufacturers instructions, it will seal nicely. Je peux rejeter les cookies non essentiels en cliquant sur Grer mes prfrences . We tried soaking the cement board and applying the kerdi in small sections. Need help liner vs liquid membrane question. How to follow the signal when reading the schematic? Additionally, seal the space around any pipes and fixtures that can be found in the shower. It is important to waterproof Hardie board to make it more water-resistant, as well as to protect the materials from the elements. This is often accomplished by filling any holes and cracks in the wall with appropriate spackling or patching material. When applying the primer, make sure to cover all surfaces thoroughly, as these will be completely covered by the KERDI membrane. KERDI was developed as a waterproofing membrane to be used in . 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. Best substrate for kerdi membrane - nsbu.treviso-aug.it As far as the tile/prep work, you are right that he is shifting the blame. This allows the cement to properly hydrate, resulting in a strong, dense bond coat. Gettin' a little delirious. Greenboard is the same as regular drywall. By the time you switch from the RG application to the Kerdi installation, it should be dry. Cement board sucks up the moisture and as a result, the kerdi doesn't always stick as well to cement board. I ended up putting up a thin, skim-coat of thinset all over the hardi board, letting it dry, and then putting up the kerdi. This allows for future compression and an area at the corner where things are more forgiving. @JimmyFix-it - You are right. Preparing drywall for KERDI membrane requires a few important steps to ensure a successful application. Cement board is a mineral-based board, usually 30 inches by 60 inches, that is used as a lower, dimensionally stable surface for installing ceramic tile, porcelain tile, or stonework. An extra layer of thinset is then added to the surface of the cement board to adhere the tiles in place. Kerdi on shower curbs - JLC-Online Forums Are there tables of wastage rates for different fruit and veg? 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. 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. Can you put Kerdi membrane over plywood? - KnowledgeBurrow.com PROBLEM SOLVED for Tub Flange when Installing Cement Board - YouTube Kerdi can be installed first on drywall or cement board. When I tried to use the edge of my trowel [per schlutter video] I could see I was pulling a lot of the 'felt' off the backer. You have to seal every little hole in the floor so the underlayment doesnt seep into spaces below. It looks like you have Kerdi installed on the floor and not Kerdi Board. Can Kerdi membrane be installed over painted drywall? In . If youre not careful, the boards can also leave behind abrasive sandy crumbs that can cause damage to your shower base or tub. Connect and share knowledge within a single location that is structured and easy to search. What's the difference between a power rail and a signal line? RedGard can be used on a wide range of interior and exterior surfaces. 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. See the foam bench and the corners. A successful tile installation largely depends on the substrate that the tile is attached to. What? If you are laying tile on floors that are wavy or out of level, self-leveling underlayment is a great solution. Hardi is definitely a "thirsty" substrate but will work, even without a primer of RedGard. Thanks to all for the feedback. Just wondering how effective is the tile on kerdi membrane vs the traditional cement backboard where tiles are glued directly to the drywall? If you want added info there's an old Kerdi thread here. ps, now that you don't need it anymore you can throw that useless cheap piece of crap magnesium float my way. It is a pliable waterproofing membrane that also doubles as a vapor retarder. This will help to extend its lifespan and make sure it looks its best for years to come. Backerboard plus a waterproofing membrane like Redgard is all that is needed for tub surrounds with thinset then tile. Yes, Kerdi membrane can be installed over plywood. The main types of cement board you could encounter are Fibre Reinforced Cement (FRC) board and gypsum board. Its essential to protect surrounding wall and floor surfaces from water or moisture damage that can occur in these areas. I trust it and have never had a callback. I want to mount a cast iron bathtub, but not pull down my 1905 plaster and lath. The Kerdi/Daltile TS underlayments do have some valid applications such as in steam shower installations where a bullet proof vapor barrier is required. Houzz Pro: One simple solution for contractors and design pros, surfer thanked Avanti Tile & Stone / Stonetech. #2 - Your suggestion has plenty of merit though. Glass mat gypsum board is a better choice. As a contractor, I have been using Kerdi since it came out. You still use metal lath, but then mix bags of powder and pour the soupy mix onto the floor. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()); Your email address will not be published. Fiber cement board is a variation of cement board that is made from compressed cement and sand and reinforced with wood fibers throughout. If I go the kerdi membrane route, do I still need to tape the joints before installing the kerdi membrane . Waterproof showers are the trend today, so RedGard is an excellent alternative to cement boards that act as vapor barriers. My floor tiles are 2" x 2"." - Lisa Jasper No - you can not use Kerdi Board on the floor. 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. RedGard, on the other hand, is a liquid waterproofing membrane made by Custom Building Products. Redgard is a similar product. The drywall's back side fails, and it's just as bad or worse than it was on the tile side. Any competent tile contractor would float the wall in mortar giving you a stronger, level, perfectly flat, and square surface to properly install tile. 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. Schluter Kerdi 108 Sq Ft Waterproofing Membrane - amazon.com ), Schluter SET, ALL-SET, FAST-SET or an unmodified thin-set mortar is recommended. You peeled it off? Should I use Kerdi membrane or cement backerboard?