I simply sponge off the excess. Kerdi-Board is an extruded polystyrene foam panel, with reinforcing material on both sides, covered by fleece webbing for effective anchoring of thin-set mortar. Additionally, seal the space around any pipes and fixtures that can be found in the shower. Installing cement board involves placing the boards atop a layer of thinset adhesive, a process known as bedding. I would get someone else. 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. Once its cleaned, use caulk to seal all of the seams where the cement board meets the walls. It fell right off? 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. Fiber cement board is available in 1/4-inch and 1/2-inch thicknesses. It's still applied to cement board. Je peux rejeter les cookies non essentiels en cliquant sur Grer mes prfrences . Need help liner vs liquid membrane question. Finally, make sure to select a thinset that is appropriate for the job, check the manufacturers recommendation, and always follow the instructions on the product label. A hundred times better to have too much before you comb than too little. 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. When it comes to selecting thinset for cement board, there are a few important factors to consider. The cement board core itself is not waterproof, but it can withstand water without falling apart. Kerdi Board is also significantly lighter in terms of weight than cement board, meaning they can be transported and lifted into place with ease evening hauling five panels at a time should be no problem. Once youre sure that the membrane is completely dry, you can then move forward with tiling. 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. For all the substrates listed in this Handbook (e.g., gypsum board, cement backerboard, etc. Both may be effective substrates, but Kerdi Board boasts significant advantages. First Kerdi can be installed on drywall or cement board. No, you do not need to install a vapor barrier, as Kerdi Board is the vapor barrier. We tried adding water to the thinset, we tried using a larger notch trowel, but nothing seems to make the Kerdi stick. No bulges either, but definetly no thin spots.-Not paying attention to the direction of the comb. Glass mat gypsum board is a better choice. While cement board and grout are not waterproof, Kerdi is and can even be directly installed over drywall. if you go with vapour barrier, then cement board. Greenboard is the same as regular drywall. All it takes is the right preparation. 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. Additionally, all seams should be sealed with Kerdi Fix and covered with fleece. However, a cement board is generally easier and less expensive to replace if a repair is needed. When it comes to installation, a Schlter system is typically easier to install than a cement board, and it also allows for more design freedom as it does not require a traditional waterproof layer. Your Get free, zero-commitment quotes from pro contractors near you. How can I find out which sectors are used by files on NTFS? 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. When it comes to tile underlayment, your options can be categorized into three main classifications, each suitable for different tiling circumstances: Although cement board is the most commonly used underlayment for tile, Kerdi board is growing in popularity as a multifunctional tile substrate. Backerboard plus a waterproofing membrane like Redgard is all that is needed for tub surrounds with thinset then tile. Additionally, a liquid water-resistant membrane should be applied over all surface areas before installation. When installed, Kerdi Board creates a substrate that is level, flat, square, plumb, and dimensionally stable. 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. Once you have selected the right sealer, follow the manufacturers instructions and apply a generous, even coat over the entire surface of the Hardie board. 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. As a contractor, I have been using Kerdi since it came out. #4 You could be adding a good 1000 pounds to your install too. The type of bonding mortar used to apply KERDI must be suitable for the substrate and must penetrate and engage the membrane fleece. ), Schluter SET, ALL-SET, FAST-SET or an unmodified thin-set mortar is recommended. This flexible polyethylene layer is easy to install and can protect the tile from both cracking and moisture. Tile Shower SurroundCement Backerboard Location? Given the complexity, its easy to see why even experienced tile setters avoid dry-pack mortar and use backer board instead when they can. Allow the adhesive to cure for the amount of time recommended by the adhesives manufacturer. 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. This will help to ensure that all drywall is completely covered. 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. ".1) is is okay to use kerdi board instead of ditra on the floor? 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. The waterproof membrane isn't a substitute for the substrate. Kerdi Board vs. Cement Board. To properly seal a cement board for a shower, its important to first properly prepare the surface. Cement board is a bit better, but you need to spray either one before applying the mortar so that it doesn't "skin over" before you can get the Kerdi up. How did this project turn out? 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. Once the wall is prepped, use a primer that is compatible with the KERDI membrane so that it will properly adhere to the wall. Let the mortar dry for 24 hours then test the shower. On a vertical surface, very little moisture . :/. A place where magic is studied and practiced? We sponge water onto the cement board. After installing your mud bed, make sure it is fully cured before applying Aquadefense. Kerdi is also used as shower lining, as required in IRC Section P2709.2 and IPC Section 417.5.2, over concrete, mortar, tile backerboard, expanded polystyrene foam board, prefabricated polystyrene shower trays, curb and ramp, gypsum board and masonry substrates." So, you can choose what board you want in your shower when using Kerdi. I used 1/2 Hardibacker board over the studs and then used the Kerdi membrane over the Hardi. The thickness of the tile is important, and should be known, but not because it changes the method of building. Kerdi Board is expensive, but I can justify it because it saves time, and it's a joy to use. Will be doing a bathroom gut and will be laying durock cement board over plywood sub floor. We installed cement board on the walls, and today when we attempted to apply the Kerdi membrane we could not get it to adhere. If you preorder a special airline meal (e.g. The 30-in. I guess that why it was so frustrating that cement board is just sooo thirsty. 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. Using cement board and a sheet membrane . Making statements based on opinion; back them up with references or personal experience. 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. Their lighter weight makes moving panels around during installation a cinch, which is a far cry from the heft of conventional cement board. I also used the Kerdi drain. We think it is the cement board (Durock) sucking the moisture out of the unmodified thinset. It costs more but it;s worth it for the ease of install IMO. There are numerous ways to do this. The kerdi membrane will probably do the same, and its regularly installed over drywall which is probably less stable. Firstly, it is important to ensure the wall is adequately prepared and that it is smooth, flat and free of defects. The Schlter system tends to be more durable than a cement board, but it also depends on the particular application and the weather. If installing large format tiles (over 15"), be sure to give the Aquadefense at least 8 hours to cure first. 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. We mixed the thinset, it wasn't as smooth as the utube video, but it was close, and we gave it ten minutes. About an argument in Famine, Affluence and Morality, Acidity of alcohols and basicity of amines. Yes. It works well, is what Schluter recommends and I've never had an issue with it. The grid lines on the surface are incredibly helpful for installation and making neat cuts. ", Signed,Never Hung Kerdi A Day In Her Life. All shower/tub areas should have concrete board (I prefer hardiboard). Can I put Kerdi board over drywall? Why are Suriname, Belize, and Guinea-Bissau classified as "Small Island Developing States"? A quality underlayment will also serve as a waterproof barrier between the subfloor and the tile surface. For all the substrates listed in this Handbook (e.g., gypsum board, cement backerboard, etc. GoBoard is a kind of backer board because the main elements of a backer board are cement, silica, fiberglass, etc. . What to use to flatten and prep wall before installing Schluter Kerdi membrane for tiling? My idea is to block in and install the tub in the existing corner, erect the new wet wall, and use hardi-backer to shim the wall out over the tub flange, then apply kerdi over the whole thing.Does kerdi take offense at being installed over hardi? Is this overkill? if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'remodelormove_com-narrow-sky-1','ezslot_27',168,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-narrow-sky-1-0');if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'remodelormove_com-narrow-sky-1','ezslot_28',168,'0','1'])};__ez_fad_position('div-gpt-ad-remodelormove_com-narrow-sky-1-0_1');.narrow-sky-1-multi-168{border:none!important;display:block!important;float:none!important;line-height:0;margin-bottom:15px!important;margin-left:auto!important;margin-right:auto!important;margin-top:15px!important;max-width:100%!important;min-height:250px;min-width:250px;padding:0;text-align:center!important}Waterproofing should also be done on other areas in the shower as well such as the corners, window sills and other areas where water can easily accumulate. Installation; As the GoBoard is very lightweight, it becomes easy to . When having to put it up on the wall or measure it for size, you will find that you can get the exact measurements you need without much trouble. 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. That's the way us "Tile Guys" do it all the time. It is important to waterproof Hardie board to make it more water-resistant, as well as to protect the materials from the elements. The tub flange can really be a pain in the butt when installing a tile tub surround. A successful tile installation largely depends on the substrate that the tile is attached to. Schluter says that the Kerdi membrane and tile can be installed over standard gypsum wall board without any problems. For indoor projects and gypsum board, thinset with a latex acrylic modifier is ideal. 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. Calculating probabilities from d6 dice pool (Degenesis rules for botches and triggers). By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. the cost of the tile job. 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. The use of modified thinset adhesive could result in an inadequate bond and could lead to possible delamination. The surface of Wedi is perfect for bonding. Asking for help, clarification, or responding to other answers. 4. LONDON. Why you use cement board? Out of curiosity, why are any of you suggesting backerboard at all? 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). . Kerdi's systems are fairly reputable. Cement board is particularly vulnerable to water damage, so waterproofing can help protect it and help it last longer. Waterproofing cement board is relatively simple and there are several different waterproofing products available. x 96 in. However, the answer you provided above suggests that the OP could omit a waterproof membrane, that I. "..2) the kerdi band isn't stuck flat -- the edges in some spots are wavy. I would fear leaks in all corners of this shower. 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? 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. Connect and share knowledge within a single location that is structured and easy to search. 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 . And we are using a drippy mixture, it slides off the trowel. It allows you to easily and quickly create tile-ready elements in bathtub surrounds and platforms, vanities, showers, shelving, and much more. This creates a strong, waterproof tile backer that also functions as an uncoupling membrane. It only takes a minute to sign up. For the floor, he should've put a mortar bed, then a membrane that goes over the curb, then another mortar bed. The shower tray eliminates the need for a mortar bed. 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. I also used a larger sized trowel than the one recommend by Schluter. These multifunctional tile substrate and building panels are thus perfect for creating bonded waterproofing assemblies with tile coverings. First Kerdi can be installed on drywall or cement board. You troweled on thinset combing it out then pressed the Kerdi into place? While cement board is a reliable tile underlayment, it isnt completely waterproof only water-resistant. x 33 ft. Waterproofing Membrane: Kerdi-Board 1/2 in. When installing KERDI with . It could take longer if the space is particularly wet or humid. Applying a conventional cement backer board to such a structure is almost impossible. 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. 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. (3ft-3in wide). @JimmyFix-it - You are right. Plus, if you use the mold and moisture resistant drywall, it will be extra insurance against mold. Hi David. I've seen preferences regarding HardieBacker and the cement board products such as Wonder Board. vegan) just to try it, does this inconvenience the caterers and staff? Kerdi 3 ft. 3 in. The bag says Mapei floortile mortar, it was the only unmodified thinset at our hardware store. 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! Now there's nothing particularly wrong with fiber-cementit's just not my first choice. Allow the primer to dry completely before proceeding with the KERDI installation. In general, modified thin-set mortar is not recommended to set ceramic and stone tile, including large format tiles, over the KERDI membrane. FRC board tends to be more moisture-resistant than gypsum board and is best suited for outdoor projects such as showers or tub surrounds.
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