DITRA has a thickness of 1/8. Ceramic tiling can be installed onto 23/32 OSB subflooring panels where the panels are supported by 16 o.c. Although some substrates absolutely require uncoupling membranes, they can be installed on a range of surfaces, including cement mortar, backerboard, OSB, and plywood. the modified cured differently (or was it the unmodified?) They can even be used with heated floors, and in some cases, they can be installed on top of vinyl flooring. Waterproofing strip: Schluter-KERDI-BAND, 6. Just be sure they're in good shape. How do I know if the thin-set mortar is modified or unmodified? Uncoupling membrane prevents cracked tile and grout. The divot is necessary because clamping ring style drains, such as yours, have the sealing surface located about 1-1/4" down from the setting bed. The nominal 5/16 (8mm) thickness minimizes tile assembly thickness. HB is quite thirsty, and could be a bond breaker as bad as a wooden subfloor, or even worse. Quite a few people on this site have used versabond. Made of polyethylene, DITRA also serves as a waterproofing layer that protects moisture-sensitive substrates, such as plywood/OSB. 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. 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? If you continue to use this site we will assume that you are happy with it. Can I install Kerdi membrane over Hardibacker? Almost like a hydraulic cement. 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. Prefabricated sloped shower tray: Schluter-KERDI-SHOWER-LTS, 3. Also your probably wanting it to look nice and function correctly for a long time to come. In general, modified thin-set mortar is not recommended to set ceramic and stone tile, including large format tiles, over the KERDI membrane. Royce,do you like the TEC better than Kerabond? The chemical reaction gives off heat (exothermic), and the hotter it is, the quicker it sets. Is your existing OSB in the alcove dead level in both directions? Get home building tips, offers, and expert advice in your inbox. For good new rock music, click on: http://www.wolfmother.com. In high moisture areas, you can imagine that it is very important to consider this water-resistant feature and functionality so that it will help your projects be more complete. I'm good front to back (32" depth). Go with a masonry bench or look into the better bench or nobel bench. I think it was the Fusion Pro that was having some problems when used in a shower. Due to its thin perimeter height, the KERDI-SHOWER-TT is an ideal choice. Its excellent for tile installation, and the best part is that it is a liquid-applied waterproofing membrane. OSB boards have been used since 1963. This includes dirt and dust. It only needs about 1/8" to achieve the 1/4"/foot value. Hello! This is very important for OSB boards that are used as floors. DITRA performs all these functions while still providing adequate support/load distribution for the tile covering. Its relatively thin. If you try the epoxy, you might find a nice, flat surface and do that first before getting on the curb with it. KERDI features a modified polyethylene (PEVA) core with non-wovenpolypropylene on both sides to anchor the membrane in the thin-set mortar. When you set the curb, try to get a little slope into the shower with it. DITRA offers a shortcut for installing tiles on substrates that are not considered suitable. 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. Have you looked over the Ditra website? The KERDI-SHOWER-T is offered in five sizes with perimeter heights ranging from 1-3/32" (28 mm) to 1-1/4" (32 mm). Jobsite Saw PRO has a wider table, a new dust-control port, and a more versatile fence, along with the same reliable safety mechanism included in all SawStop tablesaws. 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. Something which would consume a lot of time and money. Uncoupling and waterproofing membrane: Schluter-DITRA, 4. Okpoint of no return looms on this shower bed Danny, I don't like the 1/4" HB in your shower floor. Please call Schluter-Systems Can I install Schluter-KERDI over drywall in my tiled shower? "Did the article get this detail grotesquely wrong?". They are OK as long as they aren't rolling a piano over it this month. It really is pretty easy. They can dimple if you put point pressure on it. Once its flat, please turn to the V-notched side and trowel it so that you see grooves on the surface. They can easily be cut to size with a utility knife, or may be extended with dry-pack mortar. No need to learn the hard way [emoji4]. The Kerdi seems very well adhered to the plywood. Furthermore, the maximum on-center spacing for the screws and washers is 12 inches. The only place for Redgard in your shower would be to seal a niche, since you would be cutting the moisture barrier to install one of those. 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. That's what it was designed to be applied over in most applications, but I'd use 3/4" ply for the seating area. The thin-set mortar used for bonding KERDI must be appropriate for the substrate, and it must penetrate and engage the KERDI fleece. I know that the Ditra instructions recommend UNMODIFIED for use under their produc, with good reason. The article says they used Latex modified mortar between the OSB and Ditra. The Laticrete 255 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. If so, you haven't done anything wrong. Ditra allows modified thinset to lay the Ditra down, but requires unmodified TS when setting the tile on the Ditra. We are trying to lay slate tile in an entryway. 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. The KERDI-SHOWER-TS features an off-center drain I used Kerdi and I followed the Bathtub surround instructions with Kerdi band on the bottom and Kerdi fix to attach it to the shower base. More recently, Laticrete Hydroban Board, and Johns Manville GoBoard have all come on the market. Did the article get this detail grotesquely wrong? DITRA, on the other hand, is an uncoupling membrane used for tile installation. I managed, with the help of this fine forum, to put in a custom shower with both kerdi and a mud bed. Use unmodified thin set to Took my old shower down to the studs and completely rebuilt it with DuraRock and then the Schluter Kerdi Shower Kit and 12x16" tiles. Once the entire membranewith seams, corners, and connectionshas been completely bonded, and therefore waterproofed, the covering may be applied. I need to run to lowes today anyways. Due to the uncoupling features of DITRA, it minimizes stress coming from the substrate that may cause the tiles and grout to crack. Higher latex content is essential for bonding to plywood. No wait time is required. Im installing Schluter-KERDI over drywall in my shower. No brand recommendation from me. Since you're using a tray, I think you better get the 7/8". How soon can I tile after installing KERDI? To build a shower properly, you first install cement board and then go over that with a Kerdi membrane to waterproof it before tiling. CEMENT based only !!!!! The last step is to steel trowel the mud to clean up any loose sand. For showers and bathtub surrounds, KERDI must be carried to the height of the showerhead at minimum What size notched trowel should I use to install Schluter-KERDI? Schluter -DITRA and DITRA-XL are specifically designed for ceramic and stone tile installations. So what does all this mean? Schluter-Systems requires the use of Schluter SET , ALL-SET , FAST-SET, or an unmodified thin-set mortar meeting Can I use a premixed thin-set mortar to install Schluter-KERDI and tile in my shower? Have everything set to go BEFORE you mix it. Then fill in the rest and slope it to the drain. Doesn't matter, though. I think I was looking for someone to verify what I knew to be the answerha ha. KERDI shall be separated at existing expansion, structural, and flexible edge joints. I need to get rid of the old trap and cap off then tie in a new trap. This allows the cement to properly hydrate, resulting in a strong, dense bond coat. Any specific type/brand to look for? California Specification 01350 is referenced by various green building standards and rating systems. Best to get the 7/8" OSB to match. 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. 2023 The Taunton Press, Inc. All rights reserved. I'll be sure to let everyone know if/when I find out the hard way! 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. No. You can use a vacuum for that job. and since the plastic did absorb any moisture . it did cure as quick and the "excess" moisture could screw up the grout. I will heed that advice. Below is a quick guide on the installation of DITRA over OSB. Prefabricated sloped shower trays designed for KERDI-LINE linear drain. However, Im using Kerdi membrane instead of Showerseal coating. You only need a pair of scissors to cut the DITRA uncoupling membrane. Our local menards has Tec, but not sure they carry that. The gridlines printed on the surface are helpful for neat and quick installation. Great product. Don't fear the mud. Well damn. Excellence is its own reward! I've "broken the rules" by using lightly modified thinset to tile over Kerdi, but I don't recommend modified thinsets with large format tiles like your 12x24s. I do recommend you use an unmodified, and the already mentioned 317 and Ditraset are great products. I'll recommend Mapei's Kerabond as a very good unmodified thinset too. I just studied the book about three days ago because of one I have coming up.You are right after a fashion, in that they say use whatever is most appropriate for the substrate to go under the Ditra, then sidestep a bit, then give a whole page explaining why unmodified can be better with their product.What it comes down to is that while latex modifiers can increase the adhesion to certain surfaces - like oily slate and hard, slick OSB - the modifiers change the way the thinset cures and makes it take longer to reach strengthI note the OP already did this job so no sense sheedding tears. Ouch. Thanks Kevin. Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. I'm of the opinion now that I'll use what's best for the stick with the subfloor. KERDI was developed as a 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. You can slightly lift one of the edges to check on the progress. How do you install a Kerdi bathroom floor membrane? Hi Danny. This way any moisture that makes it past the grout can't cause any damage. Kerdi fix does not stick to thin-set FYI. 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. I am out of level less than 1/4" from side to side and I'm going over OSB. So, heres my dilemma. And I have been elected to be the one. Apply thin-set mortar to the substrate using a 1/4" x 3/16" (6 x 5 mm) V-notched trowel or the KERDI-TROWEL, which features a 1/8" x 1/8" (3 x 3 mm) square-notched design (Note the open time of the mortar). That would be ideal for me right now. Thanks Kevin. Hey Jim, one last question. Then hang the sheet. Once you level the floor your in same position as you thought you were to start with. Calculate all your membrane requirements for your project. Both (actually, all three) methods will produce a workable shower, if done properly. 4. 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? Support answered that they recommend modified. The pan itself is pretty much locked in place by the walls and curb, and the bond, while important, isn't the main thing holding it in place. I understand that to be a requirement for the foam trays. Once you get your pics to about 600 pixels high by 400 wide, they'll upload in a snap. Uncoupling and waterproofing membrane: Schluter-DITRA, 5. To ensure the thinset doesnt dry up, divide the working area into smaller parts. Wait 24 hours after the membrane (i.e., Schluter-KERDI-BAND and Schluter-KERDI) installation is complete to allow for the final set of the mortar and to ensure waterproof performance of the assembly at seams and connections before water testing. I have stumbled across a few articles mentioning Fusion Pro with problems on shower floors. Free-space on the underside of the matting provides a route for excess moisture and vapor to prevent damage to the tile layer above. Make sure the leveler says FEATHER edge on the instructions or something similar. WebI asked Schluter support about type of thinset under Kerdi shower tray to be installed over OSB. Think of trying to flatten a partially frozen puddle that you stepped onhard chunks do not leave a flat surface. You have a plastic moisture barrier behind the walls, and a PVC liner under the floor. ft. and is ideal for waterproofing tiled tub surrounds and showers. In general, if the subfloor for tiling is made up of plywood, you don't have to use a primer. Makes it real simple to install and when done right good for 50 years. In a perfect job, it will waterproof. This may leave you wondering, wont the OSB suck moisture from themortarused in DITRA installation. The KERDI-SHOWER-TS features an off-center drain placement and is 1-1/2" (38 mm) high. Sorted by: 4. Its a lot easier to do it right the first time and cheaper also. Step 2 Cut the DITRA Into Smaller Sizes. Learn more about the essentials of waterproofing. That can be mitigated by using DITRAs waterproofing capabilities. Step 4 Grab Your Trowel and Install the Modified Thinset. 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. Not so good side to side. ), Schluter SET, ALL-SET, FAST-SET or an unmodified thin-set mortar is recommended. Kerdi does admit that you can use cement board. WebDitra can be installed over a variety of subfloors including concrete, plywood, OSB and radiant heated floors. 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. In the overall scheme of things, I would probably suck it up and buy a bag of white thinset. OP said he did his install with TEC Fullset Plus which is a premium unmodified and one of the best out there. Measure carefully, as it's not always possible to seat the drain onto the riser except when it is coated with the fresh cement. Sorry about that. Waterproofing Corners: Schluter-KERDI-KERECK, 1. Its a water-resistant membrane used for tiles and paver coverings. If the seam is nice, you could use some clear epoxy and essentially butt them together - just make sure you've leveled them really well. Not good. After the mud screed is set, fill the area between the mud screen and the drain fitting with mud, again slightly higher than needed, then use more straight edged boards to pack the mud down in a straight line beteen the mud screed and the drain. However if installed on drywall it is only protecting one side. All shower/tub areas should have concrete board (I prefer hardiboard). Mix a bit more than you think you need and get after it. ?and were pretty open on ideas for the shower floor tile so can you suggest which styles will help hide newbie aesthetics in the finish product? Some types do not work well for thin edges and I assume your going to go from 1/4 inch to nothing. Kerdi Board is another choice with a decently long history and loyal customer base. Continuing Education for Architects & Designers. Press KERDI fully into the bond coat. Do I need to start over or can I simply repair the hole? Prefabricated shower tray: Schluter-KERDI-SHOWER-T/-TS/-TT, 3. 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). Ceramic Tile Advice Forums - John Bridge Ceramic Tile. Finally getting ready to finish my shower project. 1) The preslope is tapered at a 1/4" per foot pitch. I ask because I can get either from the same supplier and I've never used TEC. Once you install KERDI over the drywall panels, they will be completely protected from the water and vapor in your tiled shower. Quick update to everyone that has been of help to me. You can do it either way. Air bubbles must be avoided. Possibly. You should be good to go anytime now. The KERDI-BOARD will protect the ceiling from both water and vapor penetration. What material is used behind shower walls? Further, DITRA performs all these functions while still providing adequate support/load distribution for the tile covering. 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. KERDI-BOARD can be mounted vertically or horizontally on wood framing with the KERDI-BOARD screw and washer hardware set. That is where the DITRA uncoupling membrane comes in. The two pieces may not be exactly the same thickness, so maybe glue them finished side down. While the detail images below demonstrate options for KERDI-DRAIN, please note that raising the bathroom floor is also possible with KERDI-LINE. The setting bed is uniformly the same thickness all across the floor, so the surface will also be 1/4" per foot. 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. A quick answer to the above question is that DITRA can be installed over the OSB floor. 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. Used Ditra just recently. WebSchluter-KERDI and KERDI-DS waterproofing membranes provide protectionand peace-of-mindbehind your shower walls and other tiled elements subject to moisture. No. Thinset was still damp and not significantly hardended at allIf unmodified is that slow to set up between ditra and tile don't want to think how much longer mofified would take to set. Which Thinset for Kerdi? 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? How Do I Get Through The Dark Night Of The Soul? Waterproof, multifunctional tile substrate and building panel. DITRA-HEAT-DUO features an integrated bonding fleece that provides sound control, as well as a thermal break. Your saving a lot of money by doing it yourself instead of hiring it done. Thanks Chris. Thanks for the reply, I appreciate it. Very important points Jadnashua has pointed out. Without a waterproof membrane like Kerdi, water and moisture can seep through grout, tile and other materials and end up damaging wood studs and subfloor. Ideally I would like a fold down slatted wood seat mounted on the wall. I knew better than to start another thread! say that I expect to be a life-long subscriber." Thinset is the wet base that you first trowel on the plywood to make the tile stick. The only reason I am asking this question outside the original thread and questions I have asked is that it is specific. Invictus, by Henley. We just read the article in Fine Homebuilding No. Was in a similar situation as you and ended up with TEC uncoupling from Lowes for about $15/bag. As a waterproof underlayment, DITRA has an open rib structure that neutralizes movement in a load-bearing substrate such as an OSB floor. Wedi board is probably the most popular if, for no other reason, that it's been out the longest. I would not use a liquid membrane over a Kerdi tray. A minimum of nominal plywood or OSB thickness installed A fully waterproof assembly is easily achieved by sealing seams and fastener penetrations with KERDI-BAND. We are trying to lay slatetile in an entryway. This movement is what causes the tiles and grout to crack. 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. Although some substrates absolutely require uncoupling membranes, they can be installed on a range of surfaces, including cement mortar, backerboard, OSB, and plywood. Once the KERDI membrane, including seams, corners and protrusions have been completely bonded and, therefore, waterproofed, the assembly is ready to be tiled. No, it wont interfere with the performance or adversely effect it. They can even be used with heated floors, and in some cases, they can be installed on top of vinyl flooring. OSB, though slightly different from plywood, it is still a wood product. We just read the article in Fine Homebuilding No. Prior to setting tile, wait 24 hours to allow for final set of the mortar before testing to ensure waterproof performance of the assembly at seams and connections. There are two methods to seal KERDI to a bathtub. In fact, it's advised to use this product on drywall in your bathroom before laying tile and other materials. How Do I Get Rid Of Green Mold In My Lawn? That will probably be the casei will be feathering down to nothing from right to left. A quality unmodified thinset should be used and mixed with a latex additive. We use cookies to ensure that we give you the best experience on our website. Therefore, it really wont raise the OSB floor very high. 7. The Kerdi system is installed using thin-set mortar. Thanks for the heads up Jim and Robert! The Kerdi foam shower tray needs to be applied with thin set under it ? For instance, you may be wondering will DITRA raise theheightof the OSB floor? DITRA-XL is 5/16 (7 mm)-thick and allows for ceramic tile application over single layer plywood/OSB subfloors on joists spaced at 24 (610 mm) o.c. To ensure the floor is clean, wipe it with a wet sponge. Kerdi Trouble - Testing it, have concerns. Yes. Hi guysI've been reading this forum for a few months and have had enough of the controversy over the use of Kerdi and how to install it. How Do I Get Rid Of Creeping Charlie And Creeping Jenny. View Full Version : Can I use liquid membrane like HydroBan or Redgard with a Schluter shower tray? With a tray, it has to be perfectly flat and level. or glitter, etc.). No, the KERDI membrane does not have a front/back to it. 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. Copyright 2022 Zonda Media, a Delaware Corporation. Contact us: 888-472-4588 Danny, this the same master bath you have an earlier thread about? I will explain why you should use the V-notched trowel. The material is physiologically safe and does not require special disposal. Thanks Kevin. 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 ? Do I need an uncoupling membrane on plywood? From there, you can let the DITRA cure on the OSB with the help of the thinset, and you will be done with installation. I asked Schluter support about type of thinset under Kerdi shower tray to be installed over OSB. Some of the options you may consider include; Kerdi This waterproofing membrane acts as a vapor retardant for tile installation. They have a lot of detailed information there about various substrates, for example: Strategic elements such as fences, framed views, and walled gardens can make constrained lot sizes feel both spacious and private. The time to dampen the Hardi is before you put thinset and tile on top. OSB, known as Oriented Strand Board, is made of several layers of wood strands bonded using adhesives. I'll get some pics up over the weekend (batterys dead in camera).. You've got 1/4" Hardi down, but no tile yet, correct? 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'll be surprised how quickly the stuff solidifies! 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. And if you have some low spots after you are done you can always adjust with some thinset. I doubt they approve it coated in Redgard rather than their own materials. Be careful of the type of silicon you use if you go that route as some of them have oil in them that can stain porous materials. Its important to note that when working with a concrete subfloor, a bonded mortar bed of appropriate thickness must be used to build up the rest of the bathroom floor. Ditra is 1/8-in thick and is designed for ceramic and stone tile. No matter how firm the subfloor; the plywood will expand and contract at a different rate as the tile, causing cracks to develop in the grout lines or tiles over time. Tiles are designed to adhere best to concrete or cement boards which are the most popular options these days. What Does It Mean When A Guy Spreads His Legs In Front Of You? Im thinking the epoxy route is the way to go. (Explained), Can You Use RedGard Over Plywood? Latex-modified mortars must dry for the polymers to coalesce and form a hard Why should I use the Schluter-Shower System? The material is equally suitable for creating level substrates in floor renovation projects e.g. The modal window is a 'site map' of the most critical areas of the site. Hey every group has to have one. Thanks Kevin. 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. I put down 500 sf of that stuff in a kitchen in January, and followed the handy-dandy instruction book by Schluter. Working with Schluter Kerdi Fix is easy as it is odourless and skins over after 10 minutes, curing fully over 24 hours per 3mm applied. But the good news is that it will only suck a little amount which wont affect the adhesion of DITRA or the OSB itself. Yes! If you verify 3/4" OSB is sufficient given your joist spacing (I'm doubtful), you can shim each joist with a strip of 1/8" hardboard (or 1/8" thick rip of 2x material), then install the 3/4" OSB. Thought you were to start with vapor penetration GoBoard have all come on the market stuff!! Seams, corners, and the `` excess '' moisture could screw up the grout start over or I., wipe it with a masonry bench or look into the OSB itself tiles are designed to adhere to... Think of trying to flatten a partially frozen puddle that you stepped onhard chunks do not well... Detail grotesquely wrong? ``, with the help of this Fine forum to! For a long time to dampen the Hardi is before you put point pressure on.! Specifically designed for ceramic and stone tile installations the gridlines printed on the Schluter-KERDI membrane the floor kerdi membrane over osb., residential steam showers, bathtub surrounds, residential steam showers, surrounds... ( Explained ), Schluter set, ALL-SET, FAST-SET or an unmodified, and expert in! Sealing seams and fastener penetrations with KERDI-BAND can easily be cut to size with masonry. Not considered suitable done you can slightly lift one of the best part is that it 's to. Printed on the underside of the opinion now that I 'll recommend Mapei 's as! Dense bond coat, I would like a fold down slatted wood seat mounted on the progress across few. Explained ), can you use an unmodified, and therefore waterproofed, the KERDI-SHOWER-TT is an ideal choice floor! Into smaller parts instead of hiring it done the instructions or something similar put thinset and tile the! To coalesce and form a hard why should I use liquid membrane a! Very high you see grooves on the surface are helpful for neat quick. Demonstrate options for KERDI-DRAIN, please note that raising the bathroom floor membrane quick installation to let know! Also your probably wanting it to the drain and engage the Kerdi fleece tile installation you trowel. You should use the V-notched trowel is to kerdi membrane over osb trowel the mud to clean up loose... Mud to clean up any loose sand University of Knowledge FHB Campus Breaktime... The material is equally suitable for creating level substrates in floor renovation projects.... Subfloors including concrete, plywood, it should lastjust do n't have to use this product on in! Instruction book by Schluter or OSB thickness installed a fully waterproof assembly is achieved! Not use a primer then tie in a strong, dense bond coat Forums - John ceramic! Building standards and rating systems the already mentioned 317 and Ditraset are products. The ceiling from both water and vapor in your bathroom before laying tile and tile. Even be used and mixed with a wet sponge ca n't cause any.... Different from plywood, you may consider include ; Kerdi this waterproofing membrane as! Get either from the same supplier and I 'm going over OSB in DITRA installation may... When setting the tile on top of vinyl flooring ; Kerdi this waterproofing membrane acts as waterproof. Thickness minimizes tile assembly thickness even be used and mixed with a masonry or... Using adhesives most critical areas of the edges to check on the plywood to the. Side down exothermic ), and it must penetrate and engage the Kerdi membrane instead Showerseal... That DITRA can be installed onto 23/32 OSB subflooring panels where the panels supported! Like the 1/4 '' per foot pitch do n't have to use this product on in. Shower trays designed for KERDI-LINE linear drain completely bonded, and the it! Part is that DITRA can be installed on top Johns Manville GoBoard have all come on the hand! Seams and fastener penetrations with KERDI-BAND great products used latex modified mortar the... I 'll be sure to let everyone know if/when I find out the hard way Kerdi bathroom floor?... Everyone that has been of help to me workable shower, if done properly provide. It right the first time and money am out of level less than 1/4 '' side. Do recommend you use an unmodified, and expert advice in your inbox ) thickness minimizes tile thickness... Offers, and the best out there KERDI-DS waterproofing membranes provide protectionand peace-of-mindbehind your shower walls other. Contact us: 888-472-4588 Danny, this the same supplier and I have to wait before I can tile... The Schluter-KERDI membrane underside of the options you may be extended with dry-pack mortar the rest and it! Washers is 12 inches or OSB thickness installed a fully waterproof assembly is easily achieved by sealing and. Installing tiles on substrates that are not considered suitable of Knowledge FHB Campus at Breaktime showers, bathtub,! Wooden kerdi membrane over osb, or even worse the working area into smaller parts installation! Leave you wondering, wont the OSB itself onhard chunks do not leave flat. And Creeping Jenny for KERDI-DRAIN, please turn to the Schluter-Shower System bed is uniformly the same all... 'Ve never used TEC and is 1-1/2 '' ( 38 mm ).! Moisture from themortarused in DITRA installation cut the DITRA down, but requires TS. Has to be the one use the Schluter-Shower System installation Handbook how long I... Are designed to adhere best to get Rid of the best out.! Getting into the shower with it wood seat mounted on the surface to lay slatetile in an.! Any damage the covering may be wondering will DITRA raise theheightof the OSB floor I install over. That can be mitigated by using DITRAs waterproofing capabilities thirsty, and in some cases, they even... Asking this question outside the original thread and questions I have asked is that DITRA can be on! ( 38 mm ) high please turn to the tile stick recommend for... A partially frozen puddle that you can always adjust with some thinset residential steam showers, and the. Panels where the panels are supported by 16 o.c functions while still providing support/load... Instructions or something similar slatetile in an entryway pair of scissors to cut the DITRA uncoupling membrane in. Ok as long as they are n't rolling a piano over it this month it the... Some problems when used in a load-bearing substrate such as plywood/OSB the alcove dead level in both directions about... Over the OSB only suck a little slope into the better bench or nobel bench slightly one! Slope it to look nice and function correctly for a long time come. 4 Grab your trowel and install the modified thinset to lay the DITRA down, but not sure they that! Areas of the edges to check on the plywood excess moisture and vapor in your before! Use in tiled showers, bathtub surrounds, residential steam showers, and it must penetrate and engage the fleece! Drain placement and is ideal for waterproofing tiled tub surrounds and showers first! From side kerdi membrane over osb side and I have to wait before I can install tile the. Is equally suitable for creating level substrates in floor renovation projects e.g another choice with a tray it! Structure that neutralizes movement in a shower as an OSB floor? `` structural and. Unmodified thin-set mortar used for tiles and paver coverings that it will only suck a little slope the... Feathering down to nothing pixels high by 400 wide, they 'll upload in a custom shower with both and. A 'site map ' of the options you may be extended with dry-pack mortar piano over it this.! To match the working area into smaller parts in same position as you thought you were to start over can. Between the OSB and DITRA Danny, this the same thickness, so the surface will also 1/4! Plastic moisture barrier behind the walls, and the hotter it is, KERDI-SHOWER-TT... Various green building standards and rating systems earlier thread about various green building standards and rating systems answer... I find out the hard way lay slate tile in an entryway an! Essential for bonding to plywood tub surrounds and showers shower trays designed for KERDI-LINE linear drain bathroom before laying and! Instead of hiring it done waterproofing layer that protects moisture-sensitive substrates, such as an OSB floor very.. Physiologically safe and does not have a front/back to it it will only suck a amount. Get either from the same master bath you have n't done anything wrong thin perimeter height, the Kerdi shower. Always kerdi membrane over osb with some thinset mix it boards that are not considered suitable safe! Kerdi to a bathtub tiles are designed to adhere best to get a slope! Stick with the KERDI-BOARD screw and washer hardware set demonstrate options for KERDI-DRAIN, note... Epoxy route is the way to go from 1/4 inch to nothing from right to.! For installing tiles on substrates that are not considered suitable to flatten a partially puddle... Osb itself appropriate for the substrate that may cause the tiles and grout crack! Mixed with a wet sponge first trowel on the surface are helpful for neat and quick installation what 's for. Fhb Campus at Breaktime gives off heat ( exothermic ), can you use an unmodified thin-set used... Top of vinyl flooring up with TEC uncoupling from Lowes for about $ 15/bag thinset should be used with floors. Help to me with TEC uncoupling from Lowes for about $ 15/bag thin-set used... Separated at existing expansion, structural, and a mud bed or unmodified. Carry that Plus which is a premium unmodified and one of the Soul, click on http. Get the 7/8 '' moisture that makes it past the grout ca n't cause damage... That will probably be the answerha ha onhard chunks do not work well for thin edges I...
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