Kerdi board is a kind of waterproofer because these kinds of boards are made of XPS foam. vegan) just to try it, does this inconvenience the caterers and staff? the cost of the tile job. When installed, Kerdi Board creates a substrate that is level, flat, square, plumb, and dimensionally stable. I've seen preferences regarding HardieBacker and the cement board products such as Wonder Board. 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. 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. Kerdi Board vs. Cement Board. Mike Holmes uses backer on his show. To prevent those movements from transferring to the tile floor, consider installing an uncoupling membrane between the concrete and tile surfaces. What to use to flatten and prep wall before installing Schluter Kerdi membrane for tiling? It is a pliable waterproofing membrane that also doubles as a vapor retarder. In a perfect job, it will waterproof. Required fields are marked *. When applying thin-set mortar, the manufacturers instructions should be followed closely. Connect and share knowledge within a single location that is structured and easy to search. rev2023.3.3.43278. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. 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. 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. ), Minimising the environmental effects of my dyson brain, Finite abelian groups with fewer automorphisms than a subgroup. We installed cement board on the walls, and today when we attempted to apply the Kerdi membrane we could not get it to adhere. Is a PhD visitor considered as a visiting scholar? Seems like I've been using the full measure of water the bag calls for, plus about 10%.-50 lbs of thinset at a time is too much for an amatuer. Will be doing a bathroom gut and will be laying durock cement board over plywood sub floor. Without an underlayment, even the slightest movement of the subfloor can result in cracking of the tile and crumbling of the grout lines. Most of the entries in the NAME column of the output from lsof +D /tmp do not begin with /tmp. Cut the Kerdi membrane to size using a utility knife or scissors. And how do you keep too much water from interfering with the adhesion in the second scenario?Thanks!! The problem is on the back side of the drywall, which is not protected. 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. Once the adhesive has been applied and has had time to properly cure, then the KERDI membrane can be applied to the wall. While cement board is a reliable tile underlayment, it isnt completely waterproof only water-resistant. Just wondering how effective is the tile on kerdi membrane vs the traditional cement backboard where tiles are glued directly to the drywall? 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). Do you have any pictures? Project Type: Tile / Category: Bathroom. It works well, is what Schluter recommends and I've never had an issue with it. To waterproof Hardie board, you should choose a quality sealer that is designed for use on cement-based sidings. Calculating probabilities from d6 dice pool (Degenesis rules for botches and triggers). Plus, if you use the mold and moisture resistant drywall, it will be extra insurance against mold. If youre not careful, the boards can also leave behind abrasive sandy crumbs that can cause damage to your shower base or tub. Your air bubbles will travel along the valleys you've made, and it's way better if you only have to move them 20 inches to the nearest edge rather than all the way from the ceiling to the floor [Again, Mongo can, but he has mad skills].-Not paying attention to the principle of bedding top down, center out. 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). But that doesn't address your question, so it's just a comment, not an answer as such. Schluter-KERDI is a pliable, sheet-applied, bonded waterproof membrane and vapor retarder with limited crack-bridging capabilities. 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. Continuing Education for Architects & Designers. I can take a bit of it off the wall and roll it into a ball. Cement board is a good, reliable backer board that works well on both floors and walls. Caulk the gap. Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. First, felt paper is stapled to the floor and covered with expanded metal lath. We tried soaking the cement board and applying the kerdi in small sections. Will add it in. I would fear leaks in all corners of this shower. Slap it up comb it out, leave every ridge tall and perfect. Learn more about Stack Overflow the company, and our products. Cement board is particularly vulnerable to water damage, so waterproofing can help protect it and help it last longer. Install the drain adapter, if needed. Tile Shower SurroundCement Backerboard Location? On the downside, the cement boards are heavy, somewhat difficult to cut and can leave abrasive sandy crumbs that can damage tubs and shower bases if youre not careful. Politique d'Utilisation des Cookies de Houzz. 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 . It could take longer if the space is particularly wet or humid. Is it plausible for constructed languages to be used to affect thought and control or mold people towards desired outcomes? Cement board sucks up the moisture and as a result, the kerdi doesn't always stick as well to cement board. Hang the cement boar. 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. We were using a 3/16 x 5/32 trowel, probably to small. I used to "trust" the Kerdi and drywall until I had a shower that the valve broke inside the wall cavity four years after being put in. Learn about the options in exterior siding before you choose, Before you pick up a single tile, pull from these tips for expert results, Slip resistance, curves and even the mineral content of your water all affect which tile is best for your shower, We help a Houzz user ask all the right questions for designing a stylish, practical and safe shower bench, This isn't a light DIY project: You'll need heavy-duty tools and plenty of protection for your home and yourself, In steamy quarters, tile needs to stand up to all that water and vapor in style. This allows the cement to properly hydrate, resulting in To ensure the floor is clean, wipe it with a wet sponge. I guess that why it was so frustrating that cement board is just sooo thirsty. What changes do you suggest to make Bathroom looks more updated? 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. Tile can be installed directly over Kerdi-Board using the thinset method; For use with ceramic and natural stone tile; Return Policy; California residents. Not everyone knows how to do mud and lathe it's so old school plus it wears you out, ive been a setter for 27 yrs and I have yet to go back to one of my showers I installed using perma base or durock, with a liner, i have started using waterproofing such as redguard or aqua-defense. Think about movement. Additionally, a liquid water-resistant membrane should be applied over all surface areas before installation. Press the Kerdi Membrane into the Thinset Mortar with firm, even pressure to achieve full mortar coverage. The tub flange can really be a pain in the butt when installing a tile tub surround. 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. These multifunctional tile substrate and building panels are thus perfect for creating bonded waterproofing assemblies with tile coverings. The fastest method [for me and possibly other dilettants] is to stroke the knife at a diagonal to the comb marks, top down, center out, pushing all the air before you with short, overlapping strokes.-Thinset needs to be pretty darn wet: Needs to stay put when combed, but should be soft and shiney. Well, DH said he had virtually no time to work with the stuff before it dried out, so he switched from my spritz bottle to a sponge. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. It only takes a minute to sign up. I barely touch it with my hands before going to the tape knife. Is this overkill? The grid lines on the surface are incredibly helpful for installation and making neat cuts. It's not a matter of trusting the Kerdi. It also helped me to work in smaller sheets. Good luck with your project. Ultimately, the decision between a Schlter system or a cement board comes down to the particular application and the goals the user has for the floor system. Hardie board is a cement-based siding product that is water-resistant, but not waterproof. Why do small African island nations perform better than African continental nations, considering democracy and human development? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. But I did want to understand the cost breakdown as the walls then become WAY more expensive than it would be with Redguard. Such membranes typically come in a brush or a roller form and can help create a durable barrier against water infiltration. #3 This is a DIY site. is the contractor creating a waterproof schluter-kerdi shower? Jun 21, 2017. 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. It installs with screws, then you tape the joints & screw holes and install your tile. The completed assembly takes the place of more traditional backer board when installed over 3/4-inch wood subfloors. Another advantage is that the polyisocyanurate core of foam boards is waterproof. Sweeby-Can you clarify- I undestood that the thinset would tend to dry out from the thirsty hardi or skim over from the air; so how does booking the Kerdi help with the first? Schluter approves their waterproof Kerdi membrane over drywall. One thing I do like fibercement (Hardie) for is when I need thin strips of cement board. Since KERDI is impervious, it does not deprive the mortar of its moisture. It also features fleece webbing that allows for effective anchoring into thin-set mortar. A place where magic is studied and practiced? After roughly two days I would fill the corner with silicone. Additionally, all thin-set should be allowed to cure for 24 hours before tiles are installed. Do new devs get fired if they can't solve a certain bug? What was the indicator that let you know that spritzing was not enough, and that you needed to 'sponge' the Hardi? Important to overlap seams in a shingle method. I have to redo my tub surround due to moisture leaks and failing grout. Personally, I like standard drywall. RedGard, on the other hand, is a liquid waterproofing membrane made by Custom Building Products. Waterproof showers are the trend today, so RedGard is an excellent alternative to cement boards that act as vapor barriers. 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. #4 You could be adding a good 1000 pounds to your install too. It is easier to cut than cement board, it is mold resistant, and it has a built-in moisture barrier. Following the correct application of Kerdi membrane over cement board will ensure a successful waterproofing installation and lasting results for your tile project. How do you show the depth of a hole in a drawing? If you are laying tile on floors that are wavy or out of level, self-leveling underlayment is a great solution. New England. Set ceramic and stone tile over the KERDI membrane with unmodified thin-set mortar, including large format tiles. Most cement-based thin-set mortars are suitable; however, it is important to check the manufacturers instructions to ensure that the product is approved for use with Schluter systems. Cement board (cbu) is not waterproof, but is not damaged by being wet. Kerdi membrane is a waterproofing material that is designed to be used in wet areas such as bathrooms and showers before tiles are installed. I agree that gypsum seems very questionable anywhere in the wet areas of a shower. Euler: A baby on his lap, a cat on his back thats how he wrote his immortal works (origin? It is lightweight and made of expanded polystyrene. (3ft-3in wide)Or will the Kerdi membrane (with seams taped with kerdi band) prevent each board from moving . We waterproof the outside the hardiboard in 99% of the install with something like redgard. On the other hand, a Schlter system offers improved thermal insulation, which can help to reduce heating costs. All shower/tub areas should have concrete board (I prefer hardiboard). Then cement, sand and water are mixed together to a crumbly consistency and floated over the lath to form a flat surface. Kerdi Board is suitable for a number of interior applications. The shower is ready for tile. The thickness of the tile is important, and should be known, but not because it changes the method of building. is that because water doesn't really hit that area?" - Lisa Jasper That's pushing it but should be fine. DIYers on this forum seem to have nothing but problems with Hardi. And for a more secure fit, you can also use screws. Maybe try another brand of thinset? 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. 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. The back side of the drywall fails and it is just as bad or worse than if it had an issue on the tile side. Using self-leveling underlayment takes careful prep work. However, you do still have to take care to waterproof the seams and the fastener penetrations to create a waterproof assembly. builder, anti-builder, rebuilder -- Retired Moderator. As such, many homeowners and professionals find themselves wondering whether Kerdi Board or cement board is the better tile substrate. Yes, Hardie board needs to be waterproofed. I think it is engrained in me to do that so I forget to mention it. 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. How do I connect these two faces together? There is a product called Kerdiboard you might want to look into. ".1) is is okay to use kerdi board instead of ditra on the floor? True cement board (Durck, Wonderboard) is my first choice as a tile or Kerdi backer. Kerdi is not a user friendly product, and when you shrink your working time down it is downright stressful. If so, that means breaking up the floor pan. Can I put Kerdi board over drywall? Once youre sure that the membrane is completely dry, you can then move forward with tiling. Creative, C'mon over for a beer! What is a word for the arcane equivalent of a monastery? 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. 1. 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.
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