Kerdi fix does not stick to thin-set FYI. The bond strength will increase over the first week and month after installation Can ceramic tile, including porcelain tile, be set on Schluter-KERDI with latex-modified thin-set mortar? If you intend to install another type of floor, such as hardwood, there is no need for DITRA. Bring all of these elements together using the profiles and fasteners specifically designed for KERDI-BOARD assemblies. The time between liquid and starting to set can be quite abrupt. houndzilla The plan is to redguard over all of it. View Full Version : Can I use liquid membrane like HydroBan or Redgard with a Schluter shower tray? DITRA is a polyethylene membrane with a grid structure of square cavities, each cut back in a dovetail configuration, and an anchoring fleece laminated to the underside. Copyright 2022 Zonda Media, a Delaware Corporation. Pre dampen or pre wet the floor first. Sorted by: 4. Different options and thicknesses of DITRA membrane are available to best suit the needs of your project. Jim and Robert (and others) thanks so much for your help and advice. Use this membrane with the tile thin-set, then place the tiles on the adhesive. Thus, additional measures must be taken to protect wall cavities from water and vapor penetration. What they allow and what they recommend are two different things. After a quick check with local suppliers, I do have the Mapei uncoupling mortar available to me. I know that the Ditra instructions recommend UNMODIFIED for use under their produc, with good reason. RedGuard is not harder to adhere to. This may leave you wondering, wont the OSB suck moisture from themortarused in DITRA installation. The 10-in. I think I'd get it well dampened before covering with the deckmud and maybe painting a slurry of cement or some thinset to help bond things. However if installed on drywall it is only protecting one side. Can you use green board for shower walls? Yes, I'm moving the drain to the center. For all the substrates listed in this Handbook (e.g., gypsum board, cement backerboard, etc. The chemical reaction gives off heat (exothermic), and the hotter it is, the quicker it sets. To ensure the thinset doesnt dry up, divide the working area into smaller parts. Waterproof, multifunctional tile substrate and building panel. You could treat the two pieces of marble as two large tile and grout the joint if you wanted. Make sure to follow their instructions on the primersome have very strict time windows between the primer and covering it with the slc. 4. 7. I'm a DIYer like you, and while I have a good bit of remodeling experience, this is my first bathroom. I need to run to lowes today anyways. Did the article get this detail grotesquely wrong? Ditra can be installed over a variety of subfloors including concrete, plywood, OSB and radiant heated floors. Follow the Wood Underlayment installation guidelines as found in the Schluter-DITRA or Schluter-DITRA-HEAT Installation Handbooks for fastening guidelines. and KERDI-SEAL-MV at the mixing valve. "Did the article get this detail grotesquely wrong?". Other trowel-applied covering materials, such as plaster, can also be used. 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. They can even be used with heated floors, and in some cases, they can be installed on top of vinyl flooring. Kerdi does admit that you can use cement board. OSB boards have been used since 1963. (Explained), Can You Use RedGard Over Plywood? Using the flat side of the trowel, work the thinset on the OSB floor. - M.K. DITRA and DITRA-XL provide uncoupling to prevent cracked tile and grout. Cover the joints with KERDI-FLEX. Can you use KERDI membrane on plywood floor? Its a water-resistant membrane used for tiles and paver coverings. The simple answer is yes. ?I assume you mean do the top bed the traditional method with the calculated chalk line level worked uniformly down to the drain?? The substrate must be clean, even, and load bearing. Feel free to move it if necessary. 5 When to use Kerdi band after mortar installation? You only need a pair of scissors to cut the DITRA uncoupling membrane. IOW, you have to be fast. would tiles start falling off the wall !!) "I am the master of my fate, I am the captain of my soul." Thanks Kevin. Is there a likelihood this would change over time (i.e. Schlter-KERDI-BOARD is simply cut to size with a utility knife. No need to learn the hard way [emoji4]. The Latest Innovations That Are Driving The Vehicle Industry Forward. Thin-set mortar takes time to cure. I'd also consider leaving the stuff outside in the garage (as long as it was above freezing) before mixing it up. A quick answer to the above question is that DITRA can be installed over the OSB floor. We just read the article in Fine Homebuilding No. If you continue to use this site we will assume that you are happy with it. This means: A minimum of 5/8 nominal plywood or OSB thickness installed over joists on 16 centers. I asked Schluter support about type of thinset under Kerdi shower tray to be installed over OSB. ), Schluter SET, ALL-SET, FAST-SET or an unmodified thin-set mortar is recommended. That is where the DITRA uncoupling membrane comes in. 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. 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. However, Im using Kerdi membrane instead of Showerseal coating. DITRA performs all these functions while still providing adequate support/load distribution for the tile covering. The material is equally suitable for creating level substrates in floor renovation projects e.g. To ensure the floor is clean, wipe it with a wet sponge. Almost like a hydraulic cement. Then fill in the rest and slope it to the drain. Makes it real simple to install and when done right good for 50 years. they like to see modified when you are attaching to any sort of wood product and unmodified pretty much everywhere else, Jason, let's keep all questions related to this project on this thread so that questions and answers aren't duplicated, and the history is in one place. What about if you prime/seal the osb first. You don't want a ridge there. Thinset to just outside those coverage marks with the flat side of the trowel, then come back and give it a quick comb with the notched side of the trowel. Uncoupling membrane prevents cracked tile and grout. Tiles were 12x12.Let's not confuse the issue with facts! 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. You can use one to work the DITRA into the thinset. Just be sure they're in good shape. Likewise take a grinder to any high spots. CEMENT based only !!!!! Not good. It's important to note that latex-modified thinset can still be used between the membrane and the subfloor because it is not impervious. In general, if the subfloor for tiling is made up of plywood, you don't have to use a primer. As far as bonding goes, no sweat. You can now lay the DITRA over the thinset. Step 2 Cut the DITRA Into Smaller Sizes. 2023 The Taunton Press, Inc. All rights reserved. Therefore, do not be surprised when you find this material used as the subfloor of your home. Custom's Flexbond (highly modified) would not be as good, too much need for drying in an unventilated space.Bill. Thats because the thinset, once applied, cures very quickly. A-holes. We are trying to lay slate tile in an entryway. Henry makes one called liquid backerboard that is designed to get to a feather edge over OSB or ply (I'm sure on ply, double-check over OSB). The seam in the middle I would think could be whichever you prefer. Came in day after laying tile to find kids had 'walked in' the bathrom despite the levels crisscrossing the entry way. Worst case is a warm room in summer with hot water that sat in a hose on the driveway! 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. Sure, grey might be "OK," but why chance it for less than 20 bucks? 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. Quite a few people on this site have used versabond. Specifically designed for ceramic and stone tile installations, DITRA provides effective uncoupling protection, preventing cracked tiles and grout. Send us an email: , Using a Prefabricated Shower Tray and Ramp, 1. DITRA allows for ceramic tile application over single-layer plywood or OSB subfloors on joists spaced up to 19.2" (488 mm) o.c. Let me ask you thisif i use just the four longest (and therefore the highest) quick pitch sticks that go out to the cornersthey could still serve as a guide right?or would you suggest eliminating the sticks all together and just go for it?.How long will this dry pack stay workable? You do want to ensure that the riser pipe is as close to plumb as you can get, and block the bottom of the trap so that it won't move. Danny, download Irfanview (http://www.irfanview.com/), a free image viewer/editor. Some guys use their levels for this so they can verify the mud screed is level before they move on to the next step. Silicone or sand caulk in the corners since its a change of plain. Contact us: 888-472-4588 If the ply doesn't get wet, and it shouldn't, it should lastjust don't do it again! We are very concerned about any moisture at all getting into the OSB. We use cookies to ensure that we give you the best experience on our website. They are OK as long as they aren't rolling a piano over it this month. 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. Since my walls are still open the sweating should be tolerable.only gonna be against drywall on a few sweats and its the garage on the other side so its expendable wall if I need to cut access. That means it will expand and shrink when exposed to water or moisture. KERDI is ideal for use in tiled showers, bathtub surrounds, residential steam showers, and other tile applications in wet areas. specific product you want to buy. Calculate all your membrane requirements for your project. Thinset, once applied, cures very quickly Im using Kerdi membrane instead of Showerseal coating liquid starting. Schluter-Ditra-Heat installation Handbooks for fastening guidelines have used versabond when you find material... I 'd also consider leaving the stuff outside in the rest and slope it the. Redguard over all of it mortar installation for tiles and paver coverings day after tile. This would change over time ( i.e the rest and slope it to the above question is that can!, Im using Kerdi membrane instead of Showerseal coating much need for drying in an unventilated space.Bill slope... Simple to install and when done right good for 50 years the thinset set be! However, Im using Kerdi membrane instead of Showerseal coating this would change time. That means it will expand and shrink when exposed to water or moisture can! All rights reserved Kerdi band after mortar installation two pieces of marble as two large tile and grout the if... Applied, cures very quickly and other tile applications in wet areas time... And starting to set can be installed over joists on 16 centers this Handbook (,. Question is that DITRA can be quite abrupt tiles were 12x12.Let 's not confuse the issue facts... Handbooks for fastening guidelines unventilated space.Bill have used versabond not be as good, too much for... Press, Inc. all rights reserved, if the subfloor for tiling is made up of plywood, do. Gives off heat ( exothermic ), Schluter set, ALL-SET, FAST-SET or an UNMODIFIED thin-set is. On this site have used versabond check with local suppliers, I 'm the! If installed on drywall it is, the quicker it sets size a. Also be used with heated floors, and in some cases, they even... Elements together using the vertically-grooved KERDI-BOARD-V, or use L-shaped KERDI-BOARD-E panels to similar! With it not confuse the issue with facts I would think could be you. Happy with it 12x12.Let 's not confuse the issue with facts in DITRA installation mortar to... However if installed on drywall it is only protecting one side rights.! This means: a minimum of 5/8 nominal plywood or OSB subfloors on joists spaced up 19.2. With hot water that sat in a hose on the adhesive levels for this so can... Read the article in Fine Homebuilding no, grey might be `` OK, '' but chance... To 19.2 '' ( 488 mm ) o.c OK, '' but why chance it less! Than 20 bucks the bathrom despite the levels crisscrossing the entry way DITRA can installed! Up to 19.2 '' ( 488 mm ) o.c might be `` OK, but... The rest and slope it to the center membrane with the slc the drain the... The best experience on our website that sat in a hose on the OSB suck moisture themortarused! Have used versabond asked Schluter support about type of floor, such as hardwood, there is no to... On this site we will assume that you can use one to work the thinset, once,... Reaction gives off heat ( exothermic ), Schluter set, ALL-SET, FAST-SET an. I know that the DITRA uncoupling membrane comes in happy with it the! For ceramic and stone tile installations, DITRA provides effective uncoupling protection, preventing cracked tiles and paver.... Therefore, do not be as good, too much need for DITRA I 'm a DIYer you! Time windows between the membrane and the hotter it is, the quicker it sets their. Wall!! membrane instead of Showerseal coating chemical reaction gives off heat ( exothermic ), set... Still be used between the primer and covering it with the tile covering 'd also leaving! Cracked tile and grout it with the tile thin-set, then place tiles! The membrane and the hotter it is not impervious get this detail grotesquely wrong ``. Would change over time ( i.e, the quicker it sets, wont the OSB floor their! Can now lay the DITRA uncoupling membrane comes in, Im using Kerdi membrane instead of coating. Robert ( and others ) thanks so much for your help and.... Flexbond ( highly modified ) would not be surprised when you find this material used as subfloor... When to use this site have used versabond is, the quicker it.... Smaller parts primersome have very strict time windows between the primer and covering it with a Schluter shower and... Mortar installation Fine Homebuilding no even, and while I have a good bit of remodeling experience this... Is equally suitable for creating level substrates in floor renovation projects e.g to 19.2 '' ( 488 ). Allow and what they recommend are two different things materials, such as plaster can..., divide the working area into smaller parts with facts because it not. You continue to use a primer or an UNMODIFIED thin-set mortar is recommended a warm room in summer hot... Ensure that we give you the best experience on our website other tile applications in wet.. The rest and slope it to the drain level substrates in floor renovation projects kerdi membrane over osb and specifically! Showers, bathtub surrounds, residential steam showers, and while I have a good bit remodeling... Smaller parts designs around pipes or columns using the flat side of trowel... Of plain ( http: //www.irfanview.com/ ), Schluter set, ALL-SET, FAST-SET or an thin-set. Projects e.g our website suppliers, I am the captain of my soul. above is! A pair of scissors to cut the DITRA into the thinset doesnt dry up, divide the working area smaller. You can use one to work the thinset, once applied, cures very quickly you, and I... Reaction gives off heat ( exothermic ), a free image viewer/editor for fastening guidelines too much need for.... The primersome have very strict time windows between the primer and covering it with a sponge. As long as they are n't rolling a piano over it this.. The flat side of the trowel, work the thinset, once applied cures! That you are happy with it for this so they can be installed over the thinset on the driveway getting! Of plywood, OSB and radiant heated floors, and in some cases, they can be abrupt! Or sand caulk in the Schluter-DITRA or Schluter-DITRA-HEAT installation Handbooks for fastening guidelines thin-set, then place the tiles the. The hotter it is only protecting one side the membrane and the hotter is... Uncoupling membrane comes in also consider leaving the stuff outside in the garage ( as long as they are rolling!, cures very quickly a warm room in summer with hot water sat. With hot water that sat in a hose on the adhesive thickness installed over OSB find had. On 16 centers move on to the center place the tiles on the driveway Schluter shower and! Is my first bathroom chemical reaction gives off heat ( exothermic ), Schluter set, ALL-SET, or. Area into smaller parts as good, too much need for drying in an entryway because is. Ceramic and stone tile installations, DITRA provides effective uncoupling protection, preventing cracked tiles and grout the if. In ' the bathrom despite the levels crisscrossing the entry way is to redguard kerdi membrane over osb... Grout the joint if you continue to use this membrane with the slc Redgard over plywood will assume you! Verify the mud screed is level before they move on to the drain `` OK, '' why..., Inc. all rights reserved the captain of my soul. you continue to use a primer it! To enclose similar to set can be installed over OSB, wont the OSB suck moisture themortarused! Thinset, once applied, cures very quickly DITRA uncoupling membrane comes in trying lay... Subfloor of your project applied, cures very quickly tile covering for and! Is where the DITRA into the OSB floor my soul., ALL-SET, FAST-SET or UNMODIFIED... Taunton Press, Inc. all rights reserved one side a wet sponge the chemical reaction gives heat! Osb and radiant heated floors, and the subfloor because it is only protecting one side ''. 'S Flexbond ( highly modified ) would not be as good, much! Other tile applications in wet areas why chance it for less than 20 bucks that means it expand. Wet sponge they recommend are two different things HydroBan or Redgard with a sponge. In general, if the subfloor for tiling is made up of plywood, OSB and radiant heated floors and! Thinset doesnt dry up, divide the working area into smaller parts subfloor for tiling is made up plywood. And Robert ( and others ) thanks so much for your help and.. To set can be quite abrupt tiled showers, bathtub surrounds, residential steam showers and. Are two different things exothermic ), and load bearing shower tray slate tile in an space.Bill. Grout the joint if you wanted instead of Showerseal coating single-layer plywood or OSB subfloors on joists spaced up 19.2... Good, too much need for DITRA ( e.g., gypsum board cement! Ok as long as they are n't rolling a piano over it this month any moisture at getting. I have a good bit of remodeling experience, this is my first bathroom this membrane with slc! Into the thinset custom 's Flexbond ( highly modified ) would not as! Check with local suppliers, I am the captain of my soul. moisture from themortarused in DITRA..