Like cement board, the boards are heavy and hard to cut. A quality underlayment will also serve as a waterproof barrier between the subfloor and the tile surface. With Kerdi Board you get to enjoy an effective product that is lightweight, easy to cut, waterproof, and leaves behind no dust! @JimmyFix-it - You are right. This allows the cement to properly hydrate, resulting in To ensure the floor is clean, wipe it with a wet sponge. What to use to flatten and prep wall before installing Schluter Kerdi membrane for tiling? The Kerdi is essentially replacing the backerboard. 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. Furthermore, if you're working in an older home KERDI-BOARD fits better than cement board in odd spaces. In a perfect job, it will waterproof. The Kerdi-Line prefab pans and drains make me feel way more comfortable with the waterproofing. Cement board and grout are not water proof, if there's Kerdi no moisture is ever going to be able to get behind it. Install the Schluter Kerdi membrane over the backer board using the correct mortar. Bulk update symbol size units from mm to map units in rule-based symbology. If so, that means breaking up the floor pan. 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. There is a product called Kerdiboard you might want to look into. With Wedi products, the compound curves are easy to produce quickly. It only takes a minute to sign up. The gridlines printed on the surface are beneficial for the installation process, also allowing for quick, neat cuts with a utility knife. The manual can be found here: http://floorelf.com/waterproof, I would say unless you are experienced in working with Schluter-Kerdi waterproofing membrane kit, then I would say work with an easier waterproofing approach, either liquid waterproofing or a combination of liquid and traditional waterproofing (plastic covering the wood frame). Hardi is definitely a "thirsty" substrate but will work, even without a primer of RedGard. Will use the Schluter Shower system. Step 1: Measure the area. Hang the cement boar. No bulges either, but definetly no thin spots.-Not paying attention to the direction of the comb. If you are laying tile on floors that are wavy or out of level, self-leveling underlayment is a great solution. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Contact us: 888-472-4588
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. If your going to do the job do it right, and give professional advice pls. Kerdi-Board panels allow the installer to prepare and create a broad range . 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. Finally, it is important to remember that any thin-set that has been exposed to moisture must be replaced. ps, now that you don't need it anymore you can throw that useless cheap piece of crap magnesium float my way. However if installed on drywall it is only protecting one side. You'll know the RG is dry when it turns reallllly dark bright red as opposed to the pinkish color when applied. Anytime Mongo. Kerdi membrane is a waterproofing material that is designed to be used in wet areas such as bathrooms and showers before tiles are installed. The boards come in three-foot by five-foot and four-foot by eight-foot panels, sized for efficient use in bathrooms. It could take longer if the space is particularly wet or humid. Depending on factors such as room temperature, humidity, and ventilation in the area, this could take anywhere from 1 to 3 days. . Actually if you watch any pros work (not on crappy shows) on TV you will see them use backer board 99% of the time. How do you show the depth of a hole in a drawing? I used this to seal a 3 1/2 by 6 1/2 foot shower with 7 foot walls. The use of modified thinset adhesive could result in an inadequate bond and could lead to possible delamination. Is it suspicious or odd to stand by the gate of a GA airport watching the planes? What to use to flatten and prep wall before installing Schluter Kerdi membrane for tiling? Any competent tile contractor would float the wall in mortar giving you a stronger, level, perfectly flat, and square surface to properly install tile. Slap it up comb it out, leave every ridge tall and perfect. I want to mount a cast iron bathtub, but not pull down my 1905 plaster and lath. To properly seal a cement board for a shower, its important to first properly prepare the surface. is the contractor creating a waterproof schluter-kerdi shower? Finally, use a roller or brush to ensure that the membrane is secure and has no wrinkles or air bubbles. Thanks to Mongo's earlier post, we knew we'd have to spritz the Hardi -- but found that even that wasn't quite enough. The best answers are voted up and rise to the top, Not the answer you're looking for? 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. This will help to extend its lifespan and make sure it looks its best for years to come. Good luck with your project. 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. And second, since it's foam, the board is super easy to cut with just a utility knife. Needless to say, the drywall turned to mush. 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. The curb doesn't have to be any wider than a 2x4. First Kerdi can be installed on drywall or cement board. That would tell him where the edge of the framing needs to be. Allow the adhesive to cure for the amount of time recommended by the adhesives manufacturer. Also are you saying that you wet ("booking the Kerdi") the Kerdi, as well? Porcelain and ceramic tiles are stiff and hard materials, so if they are installed on an unlevel or bouncy surface they are highly susceptible to cracking. 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. Press the Kerdi Membrane into the Thinset Mortar with firm, even pressure to achieve full mortar coverage. Gettin' a little delirious. The Ditra uncoupling design is lightweight, durable, and minimizes the possibility of cracked tile and grout. ", Signed,Never Hung Kerdi A Day In Her Life. Will use the Schluter Shower system. 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. RedGard can be used on a wide range of interior and exterior surfaces. It's still applied to cement board. The colour is different. 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! Personally, I like standard drywall. First Kerdi can be installed on drywall or cement board. Can I install Kerdi board just on the walls of my shower and use a PVC membrane on the floor? The Schlter system tends to be more durable than a cement board, but it also depends on the particular application and the weather. The cement board can also become weakened and start to flake away when it absorbs moisture, causing ugly spots and patches to start appearing on the wall. If a pipe or faucet ever leaks in the wall this will ruin your shower. Install an Uncoupling Membrane Between Concrete and Tile. What precautions should I take installing tile on a backerboard in an area surrounded by cement? A mortar wall is better and can be customized easier. Let's start! For the floor, he should've put a mortar bed, then a membrane that goes over the curb, then another mortar bed. Given the complexity, its easy to see why even experienced tile setters avoid dry-pack mortar and use backer board instead when they can. Thinset with a latex acrylic modifier is best for interior projects, but if youre installing outdoors, you should use thinset with a polymer modified (PM) compound for greater moisture resistance. modified thin-set mortar is not recommended to set ceramic and stone tile, including large format tiles, over the KERDI membrane. When screwed to the framing, thin strips of cement board fracture more easily than thin strips of fiber-cement. Following these steps will help ensure that your shower space is properly sealed, and thus that the cement board is well protected from moisture. Kerdi, a waterproofing membrane made of a special polyethylene fabric, should be allowed to completely dry prior to tiling. With that said, the key benefits of Kerdi Board include: While cement board may be the most common and widely-known tile substrate, Kerdi Board is giving it a run for its money. #2. Hardibacker is a VERY "thirsty" material that sucks the moisture out of the mortar VERY quickly and I don't like it. Kerdi does admit that you can use cement board. Thanks Paul! Cement board sucks up the moisture and as a result, the kerdi doesn't always stick as well to cement board. Kerdi Board as a whole is much easier to install than Cement Board. If you want a cement board, use Durock or Wonderboard. Its essential to protect surrounding wall and floor surfaces from water or moisture damage that can occur in these areas. Why are physically impossible and logically impossible concepts considered separate in terms of probability? Schluter approves their waterproof Kerdi membrane over drywall. Overall, putting Kerdi over regular drywall can be done, with the proper steps in place to properly install the membrane and its components. 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. I don't want to use the Ditra membrane product but rather tiles directly over the cement boards. Spacers are the next step. Schluter SET, ALL-SET, FAST-SET or an unmodified thin-set mortar must be used to construct all KERDI seams to ensure watertightperformance of the system. We also found that using a heavy rolling pin worked wonders for really setting the Kerdi. We are DIYers who have already remodeled one bathroom successfully, but this is our first time using The Schluter shower system. To put things into perspective, consider that a tile floor is made up of three layers: the subfloor, the underlayment, and the tile surface you walk on. Make sure the floor is level in the shower. link to How To Organize A Bathroom Closet. Will be doing a bathroom gut and will be laying durock cement board over plywood sub floor. Required fields are marked *. 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. I've seen preferences regarding HardieBacker and the cement board products such as Wonder Board. 120 sq feet including the floor. (3ft-3in wide). To line niche shelves, for instance. Make sure to use multiple coats, if necessary. I barely touch it with my hands before going to the tape knife. This product is available in 3/16", 3/8", 1/2", 5/8" 3/4", 1" 1-1/2" and 2" thicknesses, allowing for a wide variety of installation options. Learn more about Stack Overflow the company, and our products. A successful tile installation largely depends on the substrate that the tile is attached to. 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. Making statements based on opinion; back them up with references or personal experience. Installing cement board involves placing the boards atop a layer of thinset adhesive, a process known as bedding. You have to seal every little hole in the floor so the underlayment doesnt seep into spaces below. Should I use Kerdi membrane or cement backerboard? Is it plausible for constructed languages to be used to affect thought and control or mold people towards desired outcomes? In normal residential use I wouldn't worry about it. 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. It is important to overlap the edge of the membrane so that it covers slightly more than half of the drywall behind it. 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. Welcome to the site. For all the substrates listed in this Handbook (e.g., gypsum board, cement backerboard, etc. And we are using a drippy mixture, it slides off the trowel. We installed cement board on the walls, and today when we attempted to apply the Kerdi membrane we could not get it to adhere. WATCH HERE: https://www.youtube.com/watch?v=3TRLd2HYhbU&list=PLO47JMsdYGrkxM_ZkOc3lMnsVhTqj80bB#justdoityourself #lovingit #p. Cement board is the most common and widely-known backer board. 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. I agree that gypsum seems very questionable anywhere in the wet areas of a shower. If you preorder a special airline meal (e.g. Step 7: Cut the Tile. Is it ok to fasten a shower surround to Schluter Kerdi curb? The site is called floorelf.com. Shouldn't take too long, maybe an hour or so. Thanks for contributing an answer to Home Improvement Stack Exchange! Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. It is designed to form a waterproof layer between cement board and tiles, helping create a watertight installation. How long should I wait after painting on the Redgard before I try to reapply the membrane? 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. Should I redo this wall to avoid a mold sandwich? 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. Install the drain adapter, if needed. This creates a strong, waterproof tile backer that also functions as an uncoupling membrane. Schluter says that the Kerdi membrane and tile can be installed over standard gypsum wall board without any problems. Applying a conventional cement backer board to such a structure is almost impossible. I would fear leaks in all corners of this shower. Are there tables of wastage rates for different fruit and veg? Out of curiosity, why are any of you suggesting backerboard at all? Also - use a good thinset. Problem with very thick cement board/ tile/bullnose edge, Steam Shower Slip Joint Detail - The secret is in the boarding stage. We store towels, medicine, toiletry supplies, first-aid gear, massage devices, facial steamers, spare Painting your garage is a great way to improve the look of the space and make the walls easier to clean. The niche' intermediate shelf isn't actually attached, to enable specific placement for each unique tiling application. KERDI features a modified polyethylene (PEVA) core with non-woven polypropylene on both sides to anchor the membrane in the thin-set mortar. However, if installed on drywall, it only protects one side. Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. You are wise to use a cement board. Euler: A baby on his lap, a cat on his back thats how he wrote his immortal works (origin? 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. It worked well - just like wallpapering. Bathroom closets are often catch-alls for anything and everything remotely related to self-care. rev2023.3.3.43278. Kerdi really offers very little advantage over hardiboard plus membrane. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. When it comes to applying KERDI, however, it is advised to use a regular thinset that includes portland cement as its main component. However, you do still have to take care to waterproof the seams and the fastener penetrations to create a waterproof assembly. What are the differences between "paperless drywall" and "cement board"? I usually use Durock. Can you remove tile from Kerdi membrane? What's the difference between a power rail and a signal line? 3. I used this to seal a 3 1/2 by 6 1/2 foot shower with 7 foot walls. Cement board (cbu) is not waterproof, but is not damaged by being wet. vegan) just to try it, does this inconvenience the caterers and staff? First, its super lightweight compared with the rest. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[728,90],'remodelormove_com-mobile-leaderboard-2','ezslot_25',167,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-mobile-leaderboard-2-0');Waterproofing should be done prior to the installation of any tile including behind the shower tile. 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. 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. While cement board and grout are not waterproof, Kerdi is and can even be directly installed over drywall. It is also widely available and a relatively inexpensive option approximately $10 for a 3-foot by 5-foot sheet. 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. Additionally, a liquid water-resistant membrane should be applied over all surface areas before installation. Jessica considers herself a home improvement and design enthusiast. Other mistakes I was making early on:-over working the thinset. 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. Additionally, all thin-set should be allowed to cure for 24 hours before tiles are installed. Self-leveling underlayment has many of the same advantages as a dry-pack mortar bed but doesnt require as much skill to install. Schluter says that the Kerdi membrane and tile can be installed over standard gypsum wall board without any problems. When applying the primer, make sure to cover all surfaces thoroughly, as these will be completely covered by the KERDI membrane. Schluter Kerdi-Shower-T/-TS/-TT 48 in. Plus, most self-leveling formulas harden very fast, so you have to plan carefully so you can mix and pour quickly. Once its cleaned, use caulk to seal all of the seams where the cement board meets the walls.