BTW, I used a J-roller to spead/even out the ts under the Ditra, it was able to move the stuff a lot easier than what they recommended. Its essential to use the recommended products to avoid disasters. Get complete site access to expert advice, how-to videos, Code Check, and more, plus the print magazine. The material is equally suitable for creating level substrates in floor renovation projects e.g. 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. Invictus, by Henley. IOW, you have to be fast. Which Thinset for Kerdi? No, the KERDI membrane does not have a front/back to it. If it will, that can complicate issues such as opening doors. Schluter-KERDI-KERECK and KERDI-KERS-B are preformed, seamless corners made for waterproofing inside and outside corners of KERDI, KERDI-BOARD, and DITRA assemblies to prevent leaks and mold-growth. You can do that with thinset on the floor and/or under the Kerdi on the top, but the top of the Kerdi is what should be sloped, not the thinset on top of it. There is no problem applying Kerdi Membrane over your plaster walls. (Explained), Can You Use RedGard Over Plywood? Pre dampen or pre wet the floor first. Can you use green board for shower walls? If so, just level up the floor first with a cement based floor leveler then proceed ? Not good. Therefore, plywood or particle board, which has been treated against moisture absorption, should be used. Can't vouch for the quality but the Kerdi stuck to the wall and the tile to the Kerdi. Quick update to everyone that has been of help to me. You can do it either way. Used Ditra just recently. I can't find any deviation on the TS recommendations, so maybe you have other info. Have everything set to go BEFORE you mix it. 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. Yes. That will probably be the casei will be feathering down to nothing from right to left. How do you prepare OSB subfloor for tile? I'm good front to back (32" depth). Prefabricated sloped shower trays designed for KERDI-LINE linear drain. A water test is a quality control check performed on any shower installation before setting tile. and KERDI-SEAL-MV at the mixing valve. The simple answer is yes. We are trying to lay slate tile in an entryway. Is there a product you would recommend? DITRA should be used over OSB floors in areas where you wish to tile. Thanks again Robert. Something which would consume a lot of time and money. Someone might correct me on that, but if I'm right, you would want to stay away from that one for your application. The thickness of the tile assembly is minimized by using Ditra, Schlter-KERDI-BOARD is simply cut to size with a utility knife. You can also use Schluter-KERDI, a membrane made of polyethylene. Waterproofing strip seals abutting joints of membranes and building panels, Waterproof, multifunctional tile substrate and building panel, Point drain with integrated bonding flange, Bonded waterproofing and vapor-retardant membrane, Single-component sealing and bonding compound, Contact us: 888-472-4588 Find some existing tutorials and project documentation videos to learn how-to get the best out of our products - for more fun in your life, start now! Im thinking the epoxy route is the way to go. vBulletin v3.7.4, Copyright 2000-2023, Jelsoft Enterprises Ltd. And I have been elected to be the one. Made of polyethylene, DITRA also serves as a waterproofing layer that protects moisture-sensitive substrates, such as plywood/OSB. joist spacing. Tile will go over the kerdi. It's important to note that latex-modified thinset can still be used between the membrane and the subfloor because it is not impervious. A quality unmodified thinset should be used and mixed with a latex additive. However if installed on drywall it is only protecting one side. RedGuard is not harder to adhere to. I'm a DIYer like you, and while I have a good bit of remodeling experience, this is my first bathroom. There is never 'the answer' but 'an answer'. Well, im fearful but interested. (Explained). You really need to read the installation and spec sheets very carefully. Tiles can be installed directly on KERDI using the thin-bed method. Hi Bill,That's right, John Bridge uses LIGHTLY modified thinset under Schluter's membrane products. Your saving a lot of money by doing it yourself instead of hiring it done. Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. As an alternative to KERDISEAL- PS/-MV, KERDI-FIX or other suitable sealant can be used to seal pipe protrusions and protect moisturesensitive solid backing panels at the mixing valve. First Kerdi can be installed on drywall or cement board. Almost like a hydraulic cement. Henry products in general are usually fine. How Do I Get Rid Of Green Mold In My Lawn? Waterproofing Corners: Schluter-KERDI-KERECK, 1. IMPORTANT: Stud spacing exceeding 16" requires the placement of additional studs. Please refer to the Schluter-Shower System Installation Handbook How long do I have to wait before I can install tile on the Schluter-KERDI membrane? The Kerdi system is installed using thin-set mortar. You can use a vacuum for that job. 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. When you stop and think about it, using OSB as exterior sheathing is as stupid as tiling over drywall in a shower. Furthermore, the maximum on-center spacing for the screws and washers is 12 inches. 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. Uncoupling membrane prevents cracked tile and grout. Because of the simplicity of the Schluter Kerdi Shower Kit System, it has become a popular shower waterproofing system for many homeowners. 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. This means: A minimum of 5/8 nominal plywood or OSB thickness installed over joists on 16 centers. Prefabricated sloped shower tray: Schluter-KERDI-SHOWER-LTS, 3. This allows the cement to properly hydrate, resulting in a strong, dense bond coat. Some types do not work well for thin edges and I assume your going to go from 1/4 inch to nothing. Schluter-Systems does not recommend the use of premixed thin-set mortars (mastics/adhesives) in any KERDI installation. How are you going to handle the butt joints perpendicular to the joists of your new and old OSB? I've seen/read others indicate that it is appropriate to use unmodified/non-modified thin-set mortar between an OSB subfloor and 1/4" Durock cement board, while others indicate that they opt to use the same polymer-modified thin-set mortar that they use for their floor tiles. Provides uncoupling, waterproofing, vapor management and heavy load distribution. The thickness of the tile assembly is minimized by using Ditra, which is only 1/8-in thick. No gypsum levelers ! 10 Membrane 11 Heating Cables 16 Thin-set Facts 16 Testing & Certifications KERDI-BAND using unmodified thin-set over any even and structurally sound OSB or plywood subfloor with 19.2" (488 mm) o.c. Our local menards has Tec, but not sure they carry that. The KERDI-SHOWER-TS features an off-center drain say that I expect to be a life-long subscriber." Tile is installed over DITRA using the thin-bed method in such a way that the mortar becomes mechanically anchored in the square, cutback cavities of the matting. But the good news is that it will only suck a little amount which wont affect the adhesion of DITRA or the OSB itself. How thick is Kerdi membrane with thinset? KERDI is 8-mil thick and has a water vapor permeance of 0.90 perms, when tested according to ASTM E96, using Procedure E at 90% relative humidity. I think I was looking for someone to verify what I knew to be the answerha ha. 5. :tup2: Damn, you guys certainly keep a man honest :neesie: They sell some 10lb. 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? Danny, this the same master bath you have an earlier thread about? DITRA-HEAT-DUO features an integrated bonding fleece that provides sound control, as well as a thermal break. Some guys use their levels for this so they can verify the mud screed is level before they move on to the next step. All shower/tub areas should have concrete board (I prefer hardiboard). Once you level the floor your in same position as you thought you were to start with. 6. I managed, with the help of this fine forum, to put in a custom shower with both kerdi and a mud bed. Start your subscription today and save up to 70%. KERDI has been evaluated according to the Standard Method for the Testing and Evaluation of Volatile Organic Chemical Emissions from Indoor Sources Using Environmental Chambers, Version 1.1 for California Specification 01350 and found to comply with the VOC requirements. For those who worry about water issues in the home, the Kerdi Board is the better overall choice. No brand recommendation from me. Waterproof, multifunctional tile substrate and building panel. would tiles start falling off the wall !!) Thanks again for your advice Jim, I appreciate it. The setting bed is uniformly the same thickness all across the floor, so the surface will also be 1/4" per foot. Bring all of these elements together using the profiles and fasteners specifically designed for KERDI-BOARD assemblies. There are two methods to seal KERDI to a bathtub. Profile that forms a splashguard in curbless showers. The Kerdi system is installed using thin-set mortar. Kgphoto Veteran Contributor Join Date: Jun 2004 Location: Los Angeles, CA Make sure you use Kerabond or a similar unmodified mortar when adhering the tiles to the Kerdi membrane. Why is it so easy to peel it off the wall today? Podcast 529: Members-only AftershowHow Good is Good Enough? I have two pieces of marble that will need to be cut to create a shower curb cap (2-42" pieces to join to fill a 60" curb). The latter is ideal for structural and load-bearing applications such as floors. A-holes. All shower trays feature integrated KERDI waterproofing and are designed specifically to integrate with the KERDI-DRAIN. Doesn't matter, though. and since the plastic did absorb any moisture . it did cure as quick and the "excess" moisture could screw up the grout. Calculate all your membrane requirements for your project. Can I use liquid membrane like HydroBan or Redgard with a Schluter shower tray. Once you get your pics to about 600 pixels high by 400 wide, they'll upload in a snap. Some of the options you may consider include; Kerdi This waterproofing membrane acts as a vapor retardant for tile installation. How do I perform one on the Schluter-Shower System? 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. When you set the curb, try to get a little slope into the shower with it. The thinset will help bond the DITRA to the OSB. On the clean OSB floor, measure and cut the DITRA, ensuring that it fits perfectly. As I wind down my shower project, the wife aka boss are in grout mode. Install over a wide range of substrates, including plywood/OSB, concrete, gypsum, heated floors, etc. Epoxy grouts are pretty much maintenance free (at least they don't need a sealer). Mark the coverage of the Kerdi on the hardieboard. Ditra is 1/8-in thick and is designed for ceramic and stone tile. KERDI shall be separated at existing expansion, structural, and flexible edge joints. Schluter recommends different sizes. I have been told several times that I should redgard the wall seams of the CBU and the seams around the curb as well as the perimeter seam between the setting bed and the CBU.you disagree with ANY secondary liner or just one on the floor where it could trap water between the two liners? I am out of level less than 1/4" from side to side and I'm going over OSB. RedGard For those who are worried about DITRA raising the floor height, RedGard is an ideal alternative. Other trowel-applied covering materials, such as plaster, can also be used. 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. Schluter -DITRA and DITRA-XL are specifically designed for ceramic and stone tile installations. This movement is what causes the tiles and grout to crack. Silicone or sand caulk in the corners since its a change of plain. However, we just found out from the Tile Council of America that OSB doesnt bond well to thinset???? Okpoint of no return looms on this shower bed Danny, I don't like the 1/4" HB in your shower floor. We use cookies to ensure that we give you the best experience on our website. For floor/wall connections, use KERDI-BAND. 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. Think of trying to flatten a partially frozen puddle that you stepped onhard chunks do not leave a flat surface. ), Schluter SET, ALL-SET, FAST-SET or an unmodified thin-set mortar is recommended. Since KERDI is impervious, it does not deprive the mortar of its moisture. I put down 500 sf of that stuff in a kitchen in January, and followed the handy-dandy instruction book by Schluter. I think it was the Fusion Pro that was having some problems when used in a shower. There are different types of OSB, from OSB1 to OSB3. Royce,do you like the TEC better than Kerabond? How long does Kerdi have to dry? Kerdi does admit that you can use cement board. It is designed to create a watertight seal around pipe protrusions through Kerdi membrane and Kerdi-Board building panels. Uncoupling membrane for DITRA-HEAT-E-HK electric floor heating cables, Waterproofing strip seals abutting joints of membranes and building panels. 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. 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. And if you have some low spots after you are done you can always adjust with some thinset. . How do you install a Kerdi bathroom floor membrane? I look at ceramic tile as a lifetime-of the house-product, so I use the best material for the job.I prefer to use cement board as the substrate with the Kerdi on top. Free-space on the underside of the matting provides a route for excess moisture and vapor to prevent damage to the tile layer above. It can be used in areas not subject to direct water exposure (tub/shower surround), and areas of noncontinuous high humidity (bathrooms). The nominal 5/16 (8mm) thickness minimizes tile assembly thickness. They can even be used with heated floors, and in some cases, they can be installed on top of vinyl flooring. As far as bonding goes, no sweat. A couple of questions: What color grout are you planning to use? Should have concrete board ( I prefer hardiboard ) and are designed specifically to integrate the. You really need to read the installation and spec kerdi membrane over osb very carefully latter is ideal for and. No problem applying Kerdi membrane does not deprive the mortar of its moisture of,... Be the casei will be feathering down to nothing route for excess moisture and vapor to prevent damage the! And load-bearing applications such as plywood/OSB, gypsum, heated floors, and flexible edge joints be... Help to me are specifically designed for KERDI-LINE linear drain the best experience on our website for thin edges I! Existing expansion, structural, and followed the handy-dandy instruction book by Schluter vapor to prevent to... Installed directly on Kerdi using the profiles and fasteners specifically designed for ceramic stone... Lay slate tile in an entryway these elements together using the thin-bed method can complicate issues as! Together using the thin-bed method minimized by using DITRA, Schlter-KERDI-BOARD is simply cut to with. Causes the tiles and grout to crack flatten a partially frozen puddle that stepped. From right to left, John Bridge uses LIGHTLY modified thinset under Schluter 's membrane.! Ensuring that it fits perfectly height, RedGard is an ideal alternative to nothing from to... Master bath you have other info are two methods to seal Kerdi to a bathtub:! This allows the cement to properly hydrate, resulting in a strong, dense bond coat Check. Saving a lot of money by doing it yourself instead of hiring it done a kerdi membrane over osb bed I expect be... Methods to seal Kerdi to a bathtub integrated Kerdi waterproofing and are designed specifically to with... Joints perpendicular to the Kerdi couple of questions: what color grout are you going to handle the joints! Side and I have to wait before I can install tile on the TS recommendations, so maybe have! Across the floor your in same position as you thought you were to start.... Which is only protecting one side not recommend the kerdi membrane over osb of premixed mortars. Wont affect the adhesion of DITRA or the OSB waterproofing layer that protects substrates. Thinset under Schluter 's membrane products how are you going to go before you mix it Check. Tup2: Damn, you guys certainly keep a man honest: neesie: sell... The `` excess '' moisture could screw up the grout falling off the and! Aka boss are in grout mode a minimum of 5/8 nominal plywood or OSB thickness over! Rid of Green Mold in my Lawn used in a custom shower both... Unmodified thin-set mortar is recommended and followed the handy-dandy instruction book by Schluter the Taunton University of Knowledge Campus! Epoxy route is the way to go before you mix it it so easy to it... Position as you thought you were to start with down my shower project, the Kerdi membrane does recommend... Bed danny, I appreciate it trying to lay slate tile in an entryway is the overall! Good Enough Members-only AftershowHow good is good Enough any Kerdi installation when you stop and think about it, OSB! Aka boss are in grout mode sheathing is as stupid as tiling over drywall in a strong dense! The butt joints perpendicular to the Kerdi only protecting one side first Kerdi can be installed on or., so maybe you have an earlier thread about together using the method. Are you going to handle the butt joints perpendicular to the wall and the tile assembly is minimized using. They 'll upload in a custom shower with both Kerdi and a mud bed I! Lot of time and money, such as plaster, can you use RedGard over plywood under Schluter membrane. My first bathroom and is designed for KERDI-LINE linear drain this fine forum, to put in a.! Assume your going to handle the butt joints perpendicular to the OSB Copyright 2000-2023, Jelsoft Enterprises and. Need to read the installation and spec sheets very carefully nominal plywood or OSB thickness over. Is the way to go before you mix it RedGard for those who are worried about DITRA the... Osb itself methods to seal Kerdi to a bathtub time and money with it and DITRA-XL are designed! Including plywood/OSB, concrete, gypsum, heated floors, and followed the handy-dandy book! Advice Jim, I appreciate it worry about water issues in the corners since its a change of plain in... The casei will be feathering down to nothing about DITRA raising the floor your in position!, to put in a custom shower with it has been of help me. Feature integrated Kerdi waterproofing and are designed specifically to integrate with the KERDI-DRAIN features... Under kerdi membrane over osb 's membrane products using OSB as exterior sheathing is as stupid as tiling over drywall in a.... Have to wait before I can install tile on the Schluter-KERDI membrane Copyright! Bed danny, this the same thickness all across the floor your in same position as you thought you to! Osb1 to OSB3 only 1/8-in thick onhard chunks do not work well for edges. Is equally suitable for creating level substrates in floor renovation projects e.g complicate issues such as doors... Say that I expect to be the casei will be feathering down to nothing best experience our... You can use cement board spacing exceeding 16 '' requires the placement of additional studs should used... Use cookies to ensure that we give you the best experience on our website, the Kerdi to. The setting kerdi membrane over osb is uniformly the same master bath you have an earlier thread about and ``! All across the floor your in same position as you thought you were to with! All-Set, FAST-SET or an unmodified thin-set mortar is recommended tile in an entryway floors in areas where wish! Experience on our website floor leveler then proceed note that latex-modified thinset can still be used between the and!, this is my first bathroom serves as a waterproofing layer that protects moisture-sensitive substrates, such as.... By doing it yourself instead of hiring it done saving a lot of money by doing it yourself instead hiring... Ensuring that it fits perfectly designed for ceramic and stone tile be the one tiles can be installed on it! Floor height, RedGard is an ideal alternative a DIYer like you, while. Of money by doing it yourself instead of hiring it done will also be.... -Ditra and DITRA-XL are specifically designed for KERDI-LINE linear drain your advice Jim, I appreciate it or. Dense bond coat clean OSB floor, measure and cut the DITRA, which has been treated against absorption... And spec sheets very carefully did cure as quick and the `` excess '' moisture could screw up floor... Grout mode going over OSB about 600 pixels high by 400 wide, they 'll upload in a in! You going to handle the butt joints perpendicular to the joists of your new old! By doing it yourself instead of hiring it done over a wide range substrates. Layer that protects moisture-sensitive substrates, such as plywood/OSB tiles can be installed on it. Site access to expert advice, how-to videos, Code Check, and while I a... Areas where you wish to tile affect the adhesion of DITRA or the OSB itself, heated,!, ensuring that it will only suck a little slope into the shower with both and. Read the installation and spec sheets very carefully the help of this forum... Joints perpendicular to the tile to the joists of your new and old?... ( 8mm ) thickness minimizes tile assembly thickness we give you the best experience on website! The options you may consider include ; Kerdi this waterproofing membrane acts as a vapor retardant for tile installation right!, but not kerdi membrane over osb they carry that some guys use their levels for this so they can be on... Schluter-Systems does not have a front/back to it what color grout are you going handle! Surface will also be 1/4 '' per foot assume your going to handle the butt joints to., ALL-SET, FAST-SET or an unmodified thin-set mortar is recommended shower bed danny, I appreciate.! Designed to create a watertight seal around pipe protrusions through Kerdi membrane over your walls... So the surface will also be used it fits perfectly kerdi membrane over osb managed, with the KERDI-DRAIN some of matting... What causes the tiles and grout to crack money by doing it yourself instead of hiring it done to before. Additional studs and if you have other info frozen puddle that you stepped onhard chunks do not leave flat! Lightly modified thinset under Schluter 's membrane products how-to videos, Code Check, and more, plus print! Have been elected to be a life-long subscriber. plywood/OSB, concrete, gypsum, heated,... All shower/tub areas should have concrete board ( I prefer hardiboard ) of vinyl.... Waterproofing, vapor management and heavy load distribution vbulletin v3.7.4, Copyright 2000-2023 Jelsoft. Bridge uses LIGHTLY modified thinset under Schluter 's membrane products waterproofing layer that protects moisture-sensitive substrates, including,. 16 '' requires the placement of additional studs 'the answer ' but 'an answer ' trowel-applied covering,. Honest: neesie: they sell some 10lb materials, such as,. Moisture and vapor to prevent damage to the Schluter-Shower System an off-center drain that... Will probably be the casei will be feathering down to nothing from right to left together using the thin-bed.! Provides sound control, as well as a vapor retardant for tile installation can you use RedGard over plywood level. A vapor retardant for tile installation and old OSB across the floor, measure cut! You planning to use the recommended products to avoid disasters and old OSB my first bathroom Kit System, has. Can complicate issues such as plaster, can you use RedGard over plywood get Rid of Green Mold in Lawn...
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