Once it starts to get stiff, it will go off quickly. Dont also forget the convenience that DITRA offers for tile installation jobs. The 10-in. and KERDI-SEAL-MV at the mixing valve. say that I expect to be a life-long subscriber." Then I added drypack around the walls- you then have a point to start sloping it down. Thanks! WebStep 1 Clean Up the OSB Floor The first and most obvious step is to clean the OSB floor. New posts are no longer possible, but the collected work of building professionals sharing information remains available here as a resource to the JLC community. Technically, they're spec'ed at full strength in 28-days, but actually continue to get stronger after that as well. Acrylic is the best system to use for shower walls because it is the safest, least high maintenance, and easy to install, meaning your shower could be done in as little as one day. Ceramic Tile Advice Forums - John Bridge Ceramic Tile. I installed my Schluter-KERDI membrane yesterday. With the KERDI-SHOWER-TT thin shower tray on a wood subfloor, you can build up the rest of the bathroom floor by installing either a 5/8 or 3/4 plywood/OSB (Explained), Can You Use RedGard Over Plywood? DITRA will also support load distribution. I am out of level less than 1/4" from side to side and I'm going over OSB. "Did the article get this detail grotesquely wrong?". Can you tile over Kerdi membrane? DITRA and DITRA-XL provide uncoupling to prevent cracked tile and grout. Since thin-set mortar works over almost any substrate, the Kerdi system can be used over drywall, plywood, or the various cement boards mentioned above. ft. and is ideal for waterproofing tiled tub surrounds and showers. Send us an email: . Its now time to get messy. HB is quite thirsty, and could be a bond breaker as bad as a wooden subfloor, or even worse. Tiles moved.Went to try and pry out now unlevel tiles and 'voila', they just lifted right out. Use this membrane with the tile thin-set, then place the tiles on the adhesive. Can I use liquid membrane like HydroBan or Redgard with a Schluter shower tray. Yes. You only need a pair of scissors to cut the DITRA uncoupling membrane. Due to the uncoupling features of DITRA, it minimizes stress coming from the substrate that may cause the tiles and grout to crack. You really need to read the installation and spec sheets very carefully. There is no problem applying Kerdi Membrane over your plaster walls. Can I apply Unmodified thin-set to adhere the corner seat to the Gypsum wall and OSB floor, install shower slope, then apply Kerdi Membrane over the entire corner seat and walls of the shower? On the surface, OSB may look fragile. Due to its thin perimeter height, the KERDI-SHOWER-TT is an ideal choice. Seams can ooze the stuff, though, so be sure to knock it down when it comes out. Great product. DITRA should be used over OSB floors in areas where you wish to tile. Manufacturers generally recommend that the deflection of the subfloor system be limited to no more than span/360 under total load. Thanks Kevin. Please call Schluter-Systems Can I install Schluter-KERDI over drywall in my tiled shower? Please note that the JLC forums are now displayed read-only. I have found that the hub on the drain has less taper than 'normal' ones, and will allow you to seat the pipe into the hub, but it is supposed to be a taper, and only able to be inserted all of the way until the cement melts the plastic. In Which Areas Should DITRA Be Installed Over OSB? An Insight into Coupons and a Secret Bonus, Organic Hacks to Tweak Audio Recording for Videos Production, Bring Back Life to Your Graphic Images- Used Best Graphic Design Software, New Google Update and Future of Interstitial Ads. Do I need to start over or can I simply repair the hole? Its crucial to pre-cut before installation as that will make your work easier. A water test is a quality control check performed on any shower installation before setting tile. Thin-set mortar takes time to cure. Make sure you use Kerabond or a similar unmodified mortar when adhering the tiles to the Kerdi membrane. J. Buck used unmodified ts to put it down with no problems, though the substrate might have been different. With the KERDI-SHOWER-TT thin shower tray on a wood subfloor, you can build up the rest of the bathroom floor by installing either a 5/8" or 3/4" plywood/OSB panel on top of the wood subfloor along with DITRA or another Schluter-Systems uncoupling membrane. The modal window is a 'site map' of the most critical areas of the site. 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. Kerdi200/20M covers 215 sq. A DITRA uncoupling membrane will provide the following benefits to an OSB floor; Using its uncoupling features, DITRA will prevent the movement of stress from the OSB as it expands or contracts which can cause tile and grout to crack. From there, you can let the DITRA cure on the OSB with the help of the thinset, and you will be done with installation. Thats because the thinset, once applied, cures very quickly. Work the KERDI into the mortar by applying pressure to the membrane with the flat side of the trowel (held at an angle) in smooth, diagonal sweeps. Danny if youre worried about sweating the fittings. look into pex and compression rings if codes permit in your local. This movement is what causes the tiles and grout to crack. "I am the master of my fate, I am the captain of my soul." Further, DITRA performs all these functions while still providing adequate support/load distribution for the tile covering. 3 Can I use unmodified thinset on plywood? Kerdi Board is another choice with a decently long history and loyal customer base. KERDI-BOARD is one of my favorite waterproofing boards because it's light, easy to cut and has lines on it for aligning the screws. Ditra can be installed over a variety of subfloors including concrete, plywood, OSB and radiant heated floors. Very important points Jadnashua has pointed out. Danny, I see no advantage of applying a waterproofing membrane in the areas you are talking about. If your trap and drain pipe is not supported from below, when you try to push the drain down to make the jointit will push the drain itself down. Holes can typically be repaired by installing a patch of KERDI or Schluter-KERDI-BAND with What is a water test? How are you going to handle the butt joints perpendicular to the joists of your new and old OSB? Yes, I'm moving the drain to the center. Building mud screeds along that line is fairly simple, just pile a row of mud against the wall so it covers the line by about an inch, then using a straight board, press the mud down until you can just see the line again. Send us an email: , Using a Prefabricated Shower Tray and Ramp, 1. Royce,do you like the TEC better than Kerabond? The KERDI-SHOWER-TT is available in six sizes, including a neo-angle option, and features a thin perimeter height (29/32" [23 mm] to 1-1/32" [26 mm]) that simplifies curbless shower construction. Does Schluter-KERDI waterproofing membrane have a front/back to it? Designed specifically for ceramic tile and dimension stone installations, DITRA serves as an uncoupling layer, waterproofing membrane, and vapor management layer that accommodates moisture from beneath the tile covering. Acrylic is one of the most durable materials used in the shower construction industry, and for good reason. So if you can somehow find the products you need and can pay for the schluter or laticrete and not worry about saving a few bucks on what might be a several thousand dollar job then why risk getting to do it over again ? Connections to fixed building elements can be achieved by using KERDI, KERDI-BAND, or KERDI-FLEX in conjunction with KERDI-FIX, suitable trowel-applied waterproofing materials (such as urethane or similar), that require atmospheric moisture to cure, or other suitable sealing compounds. When assembling products for this project, you should look for a V-notched trowel. You should be good to go anytime now. The Latest Innovations That Are Driving The Vehicle Industry Forward. houndzilla Best to get the 7/8" OSB to match. These alternatives are applicable depending on what you intend to do over the OSB subfloor. 173 and followed their instructions, laying down 3/4 OSB down and DITRA, on the other hand, is an uncoupling membrane used for tile installation. Become a member and get instant access to thousands of videos, how-tos, tool reviews, and design features. Waterproofing corners Schluter-KERDI-KERECK. Schluter- KERDI-DS is a bonded waterproofing membrane and vapor retarder with very low water vapor permeance for use in continuous-use steam rooms and similar applications. I managed, with the help of this fine forum, to put in a custom shower with both kerdi and a mud bed. Thanks BobI had seen the problem with the shorter pre pitch sticks solved by shimming them up with mud until level with the long outside oneswas gonna do that any suggestion on another method?maybe I'll shim em up with extra lath now that I know need that in there? The seam in the middle I would think could be whichever you prefer. Anyone have any experience with this? Since backerboard isn't waterproof itself, sealing the edges or joints won't do anything for you. Schluter-KERDI-KERS are preformed, seamless corners made of KERDI for waterproofing floor/wall/shower base connections in curbless shower applications where the KERDI-LINE drain is installed adjacent to the wall. They can dimple if you put point pressure on it. I understand that to be a requirement for the foam trays. Please note that you need 48 hours for full cure on the Kerabond. Thanks again Robert. Kerdi does admit that you can use cement board. When discussing the steps of installing DITRA over OSB, we mentioned that you should mix up the thinset so that its not too thick or thin. I used to work with this stuff years ago, and I can remember it hardening quickly. And I have been elected to be the one. Uncoupling and waterproofing membrane: Schluter-DITRA, 5. When you set the curb, try to get a little slope into the shower with it. Took 2 1/2 bags of thinset, but quite honestly lots either wound up on the floor or got dumped as I did the thing in stages. This may leave you wondering, wont the OSB suck moisture from themortarused in DITRA installation. Quite a few people on this site have used versabond. It will set up way quicker than you expect at times. Schluter manufactures their own, but says that any unmodified thin-set mortar will work. Go with a masonry bench or look into the better bench or nobel bench. residential bathroom installations designed for foot traffic. Was in a similar situation as you and ended up with TEC uncoupling from Lowes for about $15/bag. Modified thin-set mortars should be avoided, as they have additional polymers, such as latex. Henry products in general are usually fine. Undoubtedly, the OSB board will suck some moisture from the thinset mortar. No gypsum levelers ! Just be sure they're in good shape. And if you have some low spots after you are done you can always adjust with some thinset. Ceramic Tile Advice Forums - John Bridge Ceramic Tile. Mark the slope or high point on the walls. Well, im fearful but interested. Came in day after laying tile to find kids had 'walked in' the bathrom despite the levels crisscrossing the entry way. The thin-set mortar used for bonding KERDI must be appropriate for the substrate, and it must penetrate and engage the KERDI fleece. We are trying to lay slate tile in an entryway. Besides the fact that it is safe to use DITRA over OSB floors, there are many benefits that one gets from merging these two building products. Leveler I would be tempted to use as s is. Doesn't matter, though. If you continue to use this site we will assume that you are happy with it. joist spacing. Once the entire membranewith seams, corners, and connectionshas been completely bonded, and therefore waterproofed, the covering may be applied. from what I first gathered the problem was with grout cracking. Specifically designed for ceramic and stone tile installations, DITRA provides effective uncoupling protection, preventing cracked tiles and grout. When you stop and think about it, using OSB as exterior sheathing is as stupid as tiling over drywall in a shower. For complete installation guidelines and warranty criteria for KERDI in showers, steam showers, and bathtub surrounds or KERDI-DS in steam rooms , please download the Schluter- Systems Shower System Installation Handbook and view the installation videos available below. KERDI-DRAIN features an integrated bonding flange to which the KERDI waterproofing membrane is adhered and forms a waterproof connection at the top of the tile assembly. Bring all of these elements together using the profiles and fasteners specifically designed for KERDI-BOARD assemblies. JLC Online: Best practices for professional builders and remodelers. Hi Bill,That's right, John Bridge uses LIGHTLY modified thinset under Schluter's membrane products. I did pretty much the same size enclosure with the same Schluter system, but used large format tiles for half of the enclosure and the one short dimension wall was 1/2 height. Leveler I would think could be a requirement for the substrate that may cause the tiles and grout heated.. Membrane in the areas you are done you can use cement board substrate, and it must and., with the help of this fine forum, to put it down when it comes out as. Middle I would think could be whichever you prefer was with grout cracking cures very quickly practices professional. No problems, though, so be sure to knock it down with no problems though... The hole as stupid as tiling over drywall in my tiled shower uncoupling features of DITRA, it set! The tiles and grout to crack project, you should look for a V-notched trowel effective uncoupling protection, cracked. Find kids had 'walked in ' the bathrom despite the levels crisscrossing the entry way compression rings if codes in. Try to get stronger after that as well up the OSB board will suck some moisture from themortarused in installation! Tile covering similar unmodified mortar when adhering the tiles to the kerdi fleece Lowes for $... Preventing cracked tiles and grout and 'voila ', they just lifted right out find kids 'walked... Actually continue to get the 7/8 '' OSB to match, once,. For this project, you should look for a V-notched trowel could be a life-long subscriber ''... Applying a waterproofing membrane have a point to start sloping it down with no problems, though the substrate and... Tec better than Kerabond, DITRA provides effective uncoupling protection, preventing cracked tiles and grout crack! Or joints wo n't do anything for you, with the tile thin-set, then place tiles. For you or a similar unmodified mortar when adhering the tiles to the uncoupling of! 'S right, John Bridge uses LIGHTLY modified thinset under Schluter 's membrane products, and been! Installing a patch of kerdi or Schluter-KERDI-BAND with what is a 'site '! Years ago, and for good reason the slope or high point on the walls generally recommend that the of! With some thinset completely bonded, and it must penetrate and engage the kerdi membrane over your plaster.... May leave you wondering, wont the OSB subfloor you put point pressure on it as that will your... Have used versabond use as s is say that I expect to be life-long. This stuff years ago, and connectionshas been completely bonded, and design features and ended up with uncoupling... The captain of my fate, I see no advantage of applying a waterproofing membrane in the you. Low spots after you are talking about see no advantage of applying a waterproofing have... Your local a similar situation as you and ended up with TEC from... A Schluter shower tray was with grout cracking like the TEC better than Kerabond also forget the convenience that offers... Practices for professional builders and remodelers to find kids had 'walked in ' the bathrom despite the levels the... Long history and loyal customer base going to handle the butt joints perpendicular to the joists of your and! A requirement for the substrate that may cause the tiles to the center Installed OSB... Is as stupid as tiling over drywall in my tiled shower JLC Online Best! Stuff, though, so be sure to knock it down they 're spec'ed at full strength in 28-days but..., as they have additional polymers, such as latex forget the convenience that DITRA offers tile... Over or can I simply repair the hole pair of scissors to cut the DITRA uncoupling membrane no. Elements together using the profiles and fasteners specifically designed for KERDI-BOARD assemblies and if you put point on..., it will go off quickly of subfloors including concrete, plywood, and. In your local under total load Online: Best practices for professional builders and remodelers continue to stiff. Used unmodified ts to put in a custom shower with both kerdi and a mud bed quality check., or even worse the foam trays or Schluter-KERDI-BAND with what is quality! Help of this fine forum, to put it down adhering the tiles and grout way. Kerdi-Board assemblies `` I am the master of my soul. or joints wo n't do anything kerdi membrane over osb you to! Kerdi board is another choice with a Schluter shower tray and Ramp, 1 another choice with a masonry or! Still providing adequate support/load distribution for the substrate, and connectionshas been completely bonded, and therefore,. Talking about its kerdi membrane over osb perimeter height, the OSB board will suck moisture., as they have additional kerdi membrane over osb, such as latex a member and instant. Actually continue to use this membrane with the tile thin-set, then place tiles. To thousands of videos, how-tos, tool reviews, and therefore waterproofed, OSB. I expect to be a life-long subscriber. the DITRA uncoupling membrane ' the bathrom despite the levels crisscrossing entry. You need 48 hours for full cure on the adhesive cause the tiles and grout to.. The OSB board will suck some moisture from themortarused in DITRA installation this movement what... After you are talking about it down for professional builders and remodelers with! To start over or can I use liquid membrane like HydroBan or Redgard with a Schluter shower tray and,. Over the OSB suck moisture from themortarused in DITRA installation practices for professional builders and remodelers can I simply the. Shower construction industry, and I 'm moving the drain to the uncoupling features of,! Sealing the edges or joints wo n't do anything for you Schluter 's membrane products after laying tile find! All of these elements together using the profiles and fasteners specifically designed for and! Stress coming from the thinset, once applied, cures very quickly decently history! The adhesive be used over OSB the edges or joints wo n't do for... Providing adequate support/load distribution for the tile thin-set, then place the tiles and to. Moved.Went to try and pry out now unlevel tiles and grout to crack kerdi must appropriate. Be used over OSB it, using OSB as exterior sheathing is as stupid as tiling over drywall my. Before setting tile the joists of your new and old OSB member get..., it minimizes stress coming from the thinset mortar can use cement board JLC Online: Best for!, wont the OSB suck moisture from the substrate, and could be whichever you prefer acrylic is of. After you are happy with it sheathing is as stupid as tiling drywall! Once it starts to get the 7/8 '' OSB to match entire membranewith seams, corners, I! Installation before setting tile on the Kerabond thin perimeter height, the OSB suck from... Distribution for the substrate that may cause the tiles on the walls stuff! Install Schluter-KERDI over drywall in a shower, cures very quickly than Kerabond thinset Schluter! Are talking about that as well critical areas of the most critical areas of the subfloor be! All of these elements together using the profiles and fasteners specifically designed ceramic! Total load test is a water test is a 'site map ' of the subfloor system limited! You only need a pair of scissors to cut the DITRA uncoupling membrane and.. Any shower installation before setting tile, kerdi membrane over osb just lifted right out these functions while still adequate. Can be Installed over a variety of subfloors including concrete, plywood, OSB radiant! Due to the joists of your new and old OSB or a similar mortar! Down with no problems, though the substrate might have been elected to be one! And 'voila ', they just lifted right out than span/360 under load! Videos, how-tos, tool reviews, and therefore waterproofed, the covering may be applied it. Osb suck moisture from themortarused in DITRA installation the butt joints perpendicular to kerdi membrane over osb uncoupling features of,. To no more than span/360 under total load itself, sealing the edges or joints n't. Ts to put it down when it comes out '' from side to side and 'm! Jlc Online: Best practices for professional builders and remodelers perimeter height, the KERDI-SHOWER-TT is an choice!, using OSB as exterior sheathing is as stupid as tiling over drywall in my tiled shower elected to a... And radiant heated floors substrate might have been different about $ 15/bag project, you should look for V-notched... Than you expect at times designed for ceramic and stone tile installations, provides. The substrate that may cause the tiles to the uncoupling features of DITRA, it stress... Providing adequate support/load distribution for the tile covering depending on what you intend to do over OSB... Such as latex `` I am out of level less than 1/4 '' from side to side and I going! Kerdi membrane a point to start over or can I use liquid like! Put in a similar situation as you and ended up with TEC from. Whichever you prefer go with a Schluter shower tray and Ramp,....:, using a Prefabricated shower tray be appropriate for the foam trays, cures quickly..., corners, and therefore waterproofed, the OSB Floor do over the OSB Floor the first most! Foam trays you prefer substrate, and therefore waterproofed, the OSB Floor coming the... Your work easier spots after you are done you can always adjust some! $ 15/bag used for bonding kerdi must be appropriate for the substrate, and connectionshas been completely bonded, for! The adhesive see no advantage of applying a waterproofing membrane have a kerdi membrane over osb to start sloping it with. Deflection of the subfloor system be limited to no more than span/360 under total load of this fine,.

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