kerdi membrane over cement board

If you want to go to the extra effort of putting the membrane over drywall, there is no need to use greenboard. This will ensure that the coating sticks to the cement board. 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. They are absorbed into the surface material and help keep moisture away from the substrate surface. I trust it and have never had a callback. When applying thin-set mortar, the manufacturers instructions should be followed closely. This is the traditional tile backer. Finally, use a roller or brush to ensure that the membrane is secure and has no wrinkles or air bubbles. How do I align things in the following tabular environment? It could take longer if the space is particularly wet or humid. Prime first to create a flat, uniform surface that is free of dust, grease and other debris. Cement board is known to be very heavy and somewhat difficult to cut. rev2023.3.3.43278. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. What precautions should I take installing tile on a backerboard in an area surrounded by cement? Problem with very thick cement board/ tile/bullnose edge, Steam Shower Slip Joint Detail - The secret is in the boarding stage. To ensure that the Kerdi is completely dry prior to tiling, inspect the inside of the membrane for any signs of moisture or condensation. Ideally the DalSeal TS would fold into the gap between the wall and ceiling concrete board. When it comes to applying KERDI, however, it is advised to use a regular thinset that includes portland cement as its main component. 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. I imagine we could share some good stories. I set the Kerdi with my hands, pat it into the thinset with my hands, then go over it with a 4" taping knife held at a low angle to embed the Kerdi in the thinset. x 48 in. Too little, and the kerdi will never show you gray, no matter how you sweat. This is necessary to ensure that the membrane will adhere properly to the drywall. Yes, you need waterproofing behind shower tile. Self-leveling underlayment has many of the same advantages as a dry-pack mortar bed but doesnt require as much skill to install. This creates a strong, waterproof tile backer that also functions as an uncoupling membrane. Make sure the floor is level in the shower. In . 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. They are designed to provide a waterproof, vapor-tight layer to the substrate, which in this case would be the cement board. Schluter says that the Kerdi membrane and tile can be installed over standard gypsum wall board without any problems. 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. About an argument in Famine, Affluence and Morality, Acidity of alcohols and basicity of amines. 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. Builder saying he doesn't want to put my trim tile in here. 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. We installed cement board on the walls, and today when we attempted to apply the Kerdi membrane we could not get it to adhere. Regardless, cement board is a great, trusted tile substrate that will work well on both walls and floors. However, if installed on drywall, it only protects one side. Bathroom closets are often catch-alls for anything and everything remotely related to self-care. Can you remove tile from Kerdi membrane? If youre not careful, the boards can also leave behind abrasive sandy crumbs that can cause damage to your shower base or tub. Kerdi, a waterproofing membrane made of a special polyethylene fabric, should be allowed to completely dry prior to tiling. Another advantage is that the polyisocyanurate core of foam boards is waterproof. Building Panel: Price $ 119 00 $ 202 06 $ 279 00. Kerdi Board is expensive, but I can justify it because it saves time, and it's a joy to use. 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. A quality underlayment will also serve as a waterproof barrier between the subfloor and the tile surface. Cement board sucks up the moisture and as a result, the kerdi doesn't always stick as well to cement board. 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. 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. I barely touch it with my hands before going to the tape knife. And for a more secure fit, you can also use screws. We installed cement board on the walls, and today when we attempted to apply the Kerdi membrane we could not get it to adhere. I usually use Durock. So long as the seams and joint areas are properly prepared, the panels can also provide waterproofing. I have watched it done 10-15 times, have good skills, and if I tried to make large mortar walls myself it might like a little kid threw up concrete Should I use Kerdi membrane or cement backerboard? Like cement board, the boards are heavy and hard to cut. Whether or not you need a Kerdi membrane is a factor of use. This liquid waterproofing solution does more than keep water away, it also promotes tile adhesion and prevents cracking. I would fear leaks in all corners of this shower. Step 7: Cut the Tile. In normal residential use I wouldn't worry about it. This will help you achieve the best results and ensure the longevity of your project. When screwed to the framing, thin strips of cement board fracture more easily than thin strips of fiber-cement. 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. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()); Your email address will not be published. Sheets of glass mat gypsum are made from water-resistant silicone-treated gypsum, reinforced on both sides by fiberglass mats. Good luck with your project. I think the first one I used was cheap and that was part of the problem. It's a lightweight polystyrene board faced with Kerdi that comes in various thicknesses that you can use in place of drywall or cement board. Making statements based on opinion; back them up with references or personal experience. Press the Kerdi Membrane into the Thinset Mortar with firm, even pressure to achieve full mortar coverage. Once the wall is prepped, use a primer that is compatible with the KERDI membrane so that it will properly adhere to the wall. Schluter approves their waterproof Kerdi membrane over drywall. We tried adding water to the thinset, we tried using a larger notch trowel, but nothing seems to make the Kerdi stick. ".1) is is okay to use kerdi board instead of ditra on the floor? The best answers are voted up and rise to the top, Not the answer you're looking for? 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. It looks like you have Kerdi installed on the floor and not Kerdi Board. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. To create a watertight shower assembly, we installed Schluter's Kerdi membrane over the drywall, just as we would for tile.Write by:. This is confusing since Kerdi Board has no Kerdi on it. Creative, C'mon over for a beer! First, felt paper is stapled to the floor and covered with expanded metal lath. Cross your fingers and hope it's all OK. Not the best Kerdi Showcase. Hello D Zak! Personally, I like standard drywall. The 30-in. This is a bit difficult to answer as it depends on the particular application for the floor system. Welcome to the site. 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. Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. But I can't give you a +1 because telling someone to mortar all the walls in a large shower is like telling them to make an ice sculpture. The site is called floorelf.com. 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. Maybe try another brand of thinset? 3. Is it suspicious or odd to stand by the gate of a GA airport watching the planes? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. I used this to seal a 3 1/2 by 6 1/2 foot shower with 7 foot walls. This will ensure a strong bond between the KERDI membrane and the substrate. 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. With so many different types of underlayment to choose from, it can be hard to decide which is best for your project. If installing large format tiles (over 15"), be sure to give the Aquadefense at least 8 hours to cure first. Will be replacing tub shower combination with tiled shower in my home. Houzz Pro: One simple solution for contractors and design pros, surfer thanked Avanti Tile & Stone / Stonetech. see Prop 65 WARNINGS. 173 upvotes. Yes, Hardie board needs to be waterproofed. I also used a larger sized trowel than the one recommend by Schluter. For all the substrates listed in this Handbook (e.g., gypsum board, cement backerboard, etc. We tried soaking the cement board and applying the kerdi in small sections. Will add it in. With cement board as a substrate, the key is to ensure proper installation of the membrane. Your Get free, zero-commitment quotes from pro contractors near you. To learn more, see our tips on writing great answers. Portland cement-based unmodified thin-set mortars are dependent on the presence of moisture for hydration in order to gain strength. What do you mean it doesn't adhere? 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. Do new devs get fired if they can't solve a certain bug? Tile Shower SurroundCement Backerboard Location? The gridlines printed on the surface are beneficial for the installation process, also allowing for quick, neat cuts with a utility knife. FRC board tends to be more moisture-resistant than gypsum board and is best suited for outdoor projects such as showers or tub surrounds. I hope you made the guy flood test his work prior to tiling the shower floor. Yup! Can I install Kerdi board just on the walls of my shower and use a PVC membrane on the floor? Properly waterproofing a shower area sharing a living room wall, Can I use cement accelerator to decrease setup time of modified thinset. Modified thin-set mortars must dry for the polymers to coalesce and form a hard . While cement board and grout are not waterproof, Kerdi is and can even be directly installed over drywall. Additionally, it is important to waterproof cement board before tiling, as the grout and tiles can help keep the board watertight. Learn more about Stack Overflow the company, and our products. Various products can be used to waterproof shower walls such as water-resistant drywall and cement backer boards. . This feature makes building the base structure much easier and more cost . 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. RedGard can be used on a wide range of interior and exterior surfaces. Additionally, the drywall should be primed with a latex primer before applying the Kerdi membrane. 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. . But you might be struggling to figure out what kind of paint to use on garage walls. Ditra is manufactured in a 3'3 width and comes in various roll lengths (54sf, 150sf, and 323 sf). Or will the Kerdi membrane (with seams taped with kerdi band) prevent each board from moving independently? If your going to do the job do it right, and give professional advice pls. 120 sq feet including the floor. When screwed to the framing, thin strips of cement board fracture more easily than thin strips of fiber-cement. Cement board comes both in 1/4-inch-thick and 1/2-inch-thick versions. Learn more about Stack Overflow the company, and our products. I also used the Kerdi drain. We recommend our users to update the browser. If you are good with a trowel and understand how to set up and use screeds as a guide for leveling or forming the mortar, pouring a traditional mortar bed may be a good alternative to tile backer board, especially on uneven or sloping floors. . And by 'booking the Kerdi' I mean we put it in the bathtub, sprayed it with the handshower, then booked it (just like wallpaper). How long should I wait after painting on the Redgard before I try to reapply the membrane? We were using a 3/16 x 5/32 trowel, probably to small. GoBoard is a kind of backer board because the main elements of a backer board are cement, silica, fiberglass, etc. Why is there a voltage on my HDMI and coaxial cables? If you are looking for a way to minimize height buildup and eliminate a large level difference at thresholds, a mat product is a good solution. No, you do not need to install a vapor barrier, as Kerdi Board is the vapor barrier. The cement board needs to be clean, free of debris, and dry. However if installed on drywall it is only protecting one side. x 33 ft. Waterproofing Membrane: Kerdi-Board 1/2 in. Kerdi membrane is a waterproofing material that is designed to be used in wet areas such as bathrooms and showers before tiles are installed. Additionally, all seams should be sealed with Kerdi Fix and covered with fleece. If I go the kerdi membrane route, do I still need to tape the joints before installing the kerdi membrane . The type of bonding mortar used to apply KERDI must be suitable for the substrate and must penetrate and engage the membrane fleece. Connect and share knowledge within a single location that is structured and easy to search. Kerdi can even be installed over drywall. One of the major benefits of opting for Kerdi Board over cement board is the ease of installation. We tried adding water to the thinset, we tried . Installation; As the GoBoard is very lightweight, it becomes easy to . Modified thinset adhesive is a premixed product that contains latex or acrylic components which make it quite a bit more flexible than regular thinset adhesive and therefore better suited to some applications. Allow the adhesive to cure for the amount of time recommended by the adhesives manufacturer. Their lighter weight makes moving panels around during installation a cinch, which is a far cry from the heft of conventional cement board. The cement board core itself is not waterproof, but it can withstand water without falling apart. True cement board (Durck, Wonderboard) is my first choice as a tile or Kerdi backer. 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. Should I use Kerdi membrane or cement backerboard? Contact us: 888-472-4588 One thing I do like fibercement (Hardie) for is when I need thin strips of cement board. 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. LONDON. There are numerous ways to do this. How can I find out which sectors are used by files on NTFS? This is often accomplished by filling any holes and cracks in the wall with appropriate spackling or patching material. Cement board (cbu) is not waterproof, but is not damaged by being wet. Putting this stuff on walls is difficult and time . Like the example above. But I did want to understand the cost breakdown as the walls then become WAY more expensive than it would be with Redguard.

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