kerdi membrane over osb

1 Can you put Kerdi membrane over plywood? and be done with it. 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. Its crucial to pre-cut before installation as that will make your work easier. 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. Thanks Robert. A minimum of nominal plywood or OSB thickness installed Other trowel-applied covering materials, such as plaster, can also be used. Very important points Jadnashua has pointed out. Higher latex content is essential for bonding to plywood. Seems like a decent choice when no other is readily available. Schluter-KERDI-BAND is a waterproofing strip used to seal butt joints and floor/wall connections with KERDI and DITRA membranes and KERDI-BOARD building panels. Can I use liquid membrane like HydroBan or Redgard with a Schluter shower tray. While cement backer boards are moisture-resistant, they are not waterproof. Uncoupling and waterproofing membrane: Schluter-DITRA, 5. And I have been elected to be the one. Both (actually, all three) methods will produce a workable shower, if done properly. Its relatively thin. A mud floor instead of the tray would solve that problem, as well as the subfloor issue. Ditra allows modified thinset to lay the Ditra down, but requires unmodified TS when setting the tile on the Ditra. The other steps required for a successful installation are listed We are very concerned about any moisture at all getting into the OSB. You only need a pair of scissors to cut the DITRA uncoupling membrane. The first and most obvious step is to clean the OSB floor. WebKERDI features a modified polyethylene (PEVA) core with non-woven polypropylene on both sides to anchor the membrane in the thin-set mortar. 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. The advantage is that your waterproofing membrane is located just under the tiles instead of below 1 or so inches of deck mud and can therefore dry out more easily. Ditra is 1/8-in thick and is designed for ceramic and stone tile. Schluter recommends different sizes. ?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? In jobsite conditions and over a long time, who knows. Install over a wide range of substrates, including plywood/OSB, concrete, gypsum, heated floors, etc. Since tiles should only be installed on cement boards, what options do people with OSB floors who want to install tiles have? and KERDI-SEAL-MV at the mixing valve. Air bubbles must be avoided. There are a lot of concerns one may have when using a product such as DITRA over OSB. Although some substrates absolutely require uncoupling membranes, they can be installed on a range of surfaces, including cement mortar, backerboard, OSB, and plywood. DITRA will also support load distribution. On the clean OSB floor, measure and cut the DITRA, ensuring that it fits perfectly. Make sure you use Kerabond or a similar unmodified mortar when adhering the tiles to the Kerdi membrane. You can use a vacuum for that job. Can you install Kerdi board directly on studs? Jim and Robert (and others) thanks so much for your help and advice. DITRA will prevent OSB from water damage. Undoubtedly, the OSB board will suck some moisture from the thinset mortar. The type of bonding mortar used to apply KERDI must be suitable for the substrate and must penetrate and engage the membrane fleece. or OSB Joists, I-joists, or trusses Ceramic or porcelain tile Unmodified thin-set mortar DITRA-HEAT or DITRA-HEAT-TB uncoupling membrane and heating cables Latex p.c. California Specification 01350 is referenced by various green building standards and rating systems. This means: A minimum of 5/8 nominal plywood or OSB thickness installed over joists on 16 centers. 2023 The Taunton Press, Inc. All rights reserved. the Kerdi pan with the corner membranes. A bunch of products can be used over an OSB floor. Plus, get an extra 20% off with code GIFT20, Fine Homebuilding Issue #313 Online Highlights, The Fine Homebuilding Interview: James Metoyer, 10 Steps to Install Crown Molding on Cabinets, Choosing the Right Construction Tape for the Job, Expert insights on techniques and principles. Used unmodified as called for between ditra and tile. Pre dampen or pre wet the floor first. Anyone have any experience with this? Thinset is the wet base that you first trowel on the plywood to make the tile stick. That would be ideal for me right now. Step 4 Grab Your Trowel and Install the Modified Thinset. Schluter -DITRA and DITRA-XL are specifically designed for ceramic and stone tile installations. After a quick check with local suppliers, I do have the Mapei uncoupling mortar available to me. Schluter-KERDI-FLEX is a flexible polyethylene waterproofing strip used to seal movement joints over DITRA in specialty applications where large movements are expected, i.e. The Laticrete 255 Im installing Schluter-KERDI over drywall in my shower. Unmodified thin-set mortar is recommended to set ceramic and stone tile, including large format tiles, over the KERDI membrane. Henry products in general are usually fine. Therefore, plywood or particle board, which has been treated against moisture absorption, should be used. Kerdi does admit that you can use cement board. Go with a masonry bench or look into the better bench or nobel bench. Waterproofing strip: Schluter-KERDI-BAND, 5. clean, dry no lose paint etc. Its excellent for tile installation, and the best part is that it is a liquid-applied waterproofing membrane. What they allow and what they recommend are two different things. It takes a little longer than the traditional mud shower bed and water-proofing methods, but it is worth it. To ensure the floor is Our local menards has Tec, but not sure they carry that. Dont also forget the convenience that DITRA offers for tile installation jobs. Using a Prefabricated Shower Tray and Ramp. Since KERDI is impervious, it does not deprive the mortar of its moisture. In general, unmodified thin-set mortar is a blend of Portland cement, sand, and water retention agents that is mixed with How far up the wall do I need to install the Schluter-KERDI? Sorry about that. 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. 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. Leveler I would be tempted to use as s is. This site is protected by reCAPTCHA and the Google. In general, if the subfloor for tiling is made up of plywood, you don't have to use a primer. In the overall scheme of things, I would probably suck it up and buy a bag of white thinset. Danny if youre worried about sweating the fittings. look into pex and compression rings if codes permit in your local. Possibly. 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. Is your existing OSB in the alcove dead level in both directions? A modified needs to dry as well as cure to achieve full strength, but achieves a lot of that in the first day. Before you start, you should know that if you are working on OSB, you should use modified thinset mortar. Using KERDI-BOARD to build walls over stud framing in wet areas is an efficient alternative to using gypsum board. KERDI-BOARD can be installed both vertically and horizontally using the screws and washers in our hardware assortment. As I wind down my shower project, the wife aka boss are in grout mode. Waterproofing corners Schluter-KERDI-KERECK. In a perfect job, it will waterproof. The nominal 5/16 (8mm) thickness minimizes tile assembly thickness. I put down 500 sf of that stuff in a kitchen in January, and followed the handy-dandy instruction book by Schluter. You have a plastic moisture barrier behind the walls, and a PVC liner under the floor. Schluter-Systems does not recommend the use of premixed thin-set mortars (mastics/adhesives) in any KERDI installation. Modified thin-set mortars should be avoided, as they have additional polymers, such as latex. 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. Once you install KERDI over the drywall panels, they will be completely protected from the water and vapor in your tiled shower. How Do I Get Through The Dark Night Of The Soul? 5 When to use Kerdi band after mortar installation? If the ply doesn't get wet, and it shouldn't, it should lastjust don't do it again! Hello! 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? You can also use Schluter-KERDI, a membrane made of polyethylene. The Kerdi system is installed using thin-set mortar. Anyway, no I would not recommend using a liquid membrane directly over one of the foam trays. It only needs about 1/8" to achieve the 1/4"/foot value. Once the entire membranewith seams, corners, and connectionshas been completely bonded, and therefore waterproofed, the covering may be applied. Can I install Kerdi membrane over Hardibacker? That will eliminate/slow down theloss of moisture from the mortar. "I am the master of my fate, I am the captain of my soul." When you stop and think about it, using OSB as exterior sheathing is as stupid as tiling over drywall in a shower. 6. - M.K. Mix a bit more than you think you need and get after it. "Did the article get this detail grotesquely wrong?". Ensure the pieces are big enough to fit the entire OSB subfloor. Yes, I'm moving the drain to the center. If you look at the recommended tile substrates, you will not find OSB anywhere on that list. 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. This allows the cement to properly hydrate, resulting in a strong, dense bond coat. 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. CEMENT based only !!!!! Not good. Further, DITRA performs all these functions while still providing adequate support/load distribution for the tile covering. 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. Danny, download Irfanview (http://www.irfanview.com/), a free image viewer/editor. 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. The thickness of the tile assembly is minimized by using Ditra, which is only 1/8-in thick. Have everything set to go BEFORE you mix it. Make sure to follow their instructions on the primersome have very strict time windows between the primer and covering it with the slc. 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. Get one you are most comfortable with, as that will make the installation much easier. ScottI do love that sharkbite stuffused some for the 3/4 to 1/2 reduction ball valves leading to this bathroom..its hard to trust but it aint leaked a dropa little too expensive though.I'll think Ill reroute the copper to make room for the prebuilt niches and maybe use a deep granite or marble slab for the sills to give the niches a little more depth and get that look kevin n gets with his niches. I installed my Schluter-KERDI membrane yesterday. Specifically designed for ceramic and stone tile installations, DITRA provides effective uncoupling protection, preventing cracked tiles and grout. This allows the cement to properly hydrate, resulting in 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. Latex-modified mortars must dry for the polymers to coalesce and form a hard Why should I use the Schluter-Shower System? 4. That is where the DITRA uncoupling membrane comes in. Ideally I would like a fold down slatted wood seat mounted on the wall. Become a member and get instant access to thousands of videos, how-tos, tool reviews, and design features. 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. All shower trays feature integrated KERDI waterproofing and are designed specifically to integrate with the KERDI-DRAIN. If you can tile a shower you can do a mud bed. OSB, known as Oriented Strand Board, is made of several layers of wood strands bonded using adhesives. A couple of questions: What color grout are you planning to use? Any specific type/brand to look for? Copyright 2022 Zonda Media, a Delaware Corporation. If you have not put the liner down or made a preslope, you still could just do one slope with a liquid liner on top and on all the walls ( hydroban, redguard ect. ) How do you prepare OSB subfloor for tile? 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. It is not necessary to tape the joints between drywall panels before installing KERDI. This way any moisture that makes it past the grout can't cause any damage. You can use one to work the DITRA into the thinset. However if installed on drywall it is only protecting one side. Follow the Wood Underlayment installation guidelines as found in the Schluter-DITRA or Schluter-DITRA-HEAT Installation Handbooks for fastening guidelines. Kerdi eliminates water damage which can lead to mold and mildew. :). (Explained). While the detail images below demonstrate options for KERDI-DRAIN, please note that raising the bathroom floor is also possible with KERDI-LINE. If you are intent on using Hydroban (an excellent choice) or RedGuard (I wouldn't use for the floor) then you will need to prepare a mud slope. Get home building tips, offers, and expert advice in your inbox. Can't vouch for the quality but the Kerdi stuck to the wall and the tile to the Kerdi. No brand recommendation from me. Thanks! 173 and followed their instructions, laying down 3/4 OSB down and Schlter-KERDI-BOARD is simply cut to size with a utility knife. J. Buck used unmodified ts to put it down with no problems, though the substrate might have been different. http://www.johnbridge.com/vbulletin/showthread.php?t=91369. 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? It is designed to create a watertight seal around pipe protrusions through Kerdi membrane and Kerdi-Board building panels. Instead, the plywood preparation is done so that it is made water-resistant and more adhesive suitable without using a primer. As for the seams, they can be sealed with Kerdi Band. Thanks Kevin. Makes things a lot easier. I will be using Ditraset to install the kerdi on the walls and to set the tiles. Ceramic Tile Advice Forums - John Bridge Ceramic Tile. 4. You can now lay the DITRA over the thinset. I can confidently and since the plastic did absorb any moisture . it did cure as quick and the "excess" moisture could screw up the grout. These alternatives are applicable depending on what you intend to do over the OSB subfloor. Also, apply the acrylic mastic between the Pressing the Escape (ESC) button will close the modal and bring you back to where you were on the page. The KERDI-BOARD will protect the ceiling from both water and vapor penetration. Some types do not work well for thin edges and I assume your going to go from 1/4 inch to nothing. They can dimple if you put point pressure on it. Acrylic is one of the most durable materials used in the shower construction industry, and for good reason. How do I know if the thin-set mortar is modified or unmodified? Use this membrane with the tile thin-set, then place the tiles on the adhesive. Using the flat side of the trowel, work the thinset on the OSB floor. Besides Schluters recommendation, several experts have used DITRA as an uncoupling membrane for tile installation over OSB. 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). Have you looked over the Ditra website? Mark the slope or high point on the walls. It can still feel the effects of excess moisture exposure. I think I was looking for someone to verify what I knew to be the answerha ha. 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? Excellence is its own reward! A fully waterproof assembly is easily achieved by sealing seams and fastener penetrations with KERDI-BAND. Is this going to be a mud job? Do I need an uncoupling membrane on plywood? Uncoupling and waterproofing membrane: Schluter-DITRA, 4. Well, im fearful but interested. What Does It Mean When A Guy Spreads His Legs In Front Of You? The classically-inspired KERDI-DRAIN is offered in a variety of grate finishes and accommodates a wide range of tile thicknesses. Use unmodified thin set to Install KERDI-SEAL-PS pipe seals at showerhead, body sprays, etc. Feel free to move it if necessary. JLC Online: Best practices for professional builders and remodelers. To allow for greater movement, the center section of the KERDI-FLEX can be tucked into the cavity of the expansion joint prior to bonding. Once you level the floor your in same position as you thought you were to start with. Sorted by: 4. In fact, it's advised to use this product on drywall in your bathroom before laying tile and other materials. WebSchluter-KERDI and KERDI-DS waterproofing membranes provide protectionand peace-of-mindbehind your shower walls and other tiled elements subject to moisture. 5. Step 5 Install the DITRA Over the Thinset. I've used both modified and un haven't noticed any difference. DITRA should be used over OSB floors in areas where you wish to tile. Can you use KERDI membrane on plywood floor? The thickness of the tile assembly is minimized by using Ditra, Make sure the leveler says FEATHER edge on the instructions or something similar. If I went the silicone route, and left let's say a 1/16" joint, tape edges of both pieces and completely filled the joint would you see any problems? Point drain with integrated bonding flange. It shouldnt be too thin or too thick. 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. If that is the case, I am assuming Versabond is ok? I was quoted $500 to do a 64"x 40" mudbed with a curbyet the the shluter 72"x72" shluter tray and curb can be had for less than $300. Cut KERDI to size prior to application. (Explained), Can You Use RedGard Over Plywood? 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. 2. 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. If working with a wood subfloor, you can build up the rest of the subfloor 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. Multifunctional building panels: Schluter-KERDI-BOARD, 4. :). This is very important for OSB boards that are used as floors. If you were using a mud floor as your base, having the floor a little uneven wouldn't matter. Was in a similar situation as you and ended up with TEC uncoupling from Lowes for about $15/bag. Keep in mind all of the work your doing. Kerdi Trouble - Testing it, have concerns. Repeat until you are sure the DITRA has adhered to the thinset. Multifunctional building panels: Schluter-KERDI-BOARD, 2. On the surface, OSB may look fragile. This seems to contradict what I The Kerdi foam shower tray needs to be applied with thin set under it ? 3. This seems to contradict what I have read but ok. 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. The thin-set mortar used for bonding KERDI must be appropriate for the substrate, and it must penetrate and engage the KERDI fleece. Kerdi Board is another choice with a decently long history and loyal customer base. "I have learned so much thanks to the searchable articles on the FHB website. If you must tape Schluter-KERDI over Solid Backing for Walls, Scott McGillivray on Waterproofing Principles using Schluter-Systems, How to Waterproof Connections to Fixed Building Elements. This movement is what causes the tiles and grout to crack. Over a concrete subfloor use a bonded mortar bed of appropriate thickness to build up the rest of the bathroom floor. 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? Just be sure they're in good shape. 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. Please call Schluter-Systems Can I install Schluter-KERDI over drywall in my tiled shower? Thanks Kevin. Even though OSB3 can be used in humid areas. This includes dirt and dust. I am out of level less than 1/4" from side to side and I'm going over OSB. That's what it was designed to be applied over in most applications, but I'd use 3/4" ply for the seating area. Thanks for the reply Robert. Hey every group has to have one. DITRA allows for ceramic tile application over single-layer plywood or OSB subfloors on joists spaced up to 19.2" (488 mm) o.c. The 10-in. Send us an email: , construction-most-common-waterproofing-mistakes, Using a Prefabricated Shower Tray and Ramp, SchluterKERDI was evaluated by ICC-ES - ESR-2467, Schluter-DITRA was evaluated by ICC-ES - ESR-2467, Schluter-KERDI is listed by ICC-ES - PMG-1204, Schluter-KERDI-DS is listed by ICC-ES - PMG-1204, Schluter-KERDI-DRAIN is listed by ICC-ES - PMG-1204, Schluter Systems holds a Los Angeles Research Report (LARR) for Kerdi - File M-100022, Schluter Systems holds a Los Angeles Research Report (LARR) for Kerdi-Drain - File M-100023, Sheet-appliedpolyethylene waterproofing membrane and vapor retarder, Eliminates water damage which can lead to mold and mildew, Features a modified polyethylene (PEVA) core with non-woven polypropyleneon both sides, Features an anchoring fleece on both sides to anchor the membrane in thin-set mortar, Ideal for waterproofing in conjunction with tiled surfaces on walls and floors, KERDI is 8-mil-thick and guarantees uniform thickness, The 6 7 (2-meter) wide roll covers wall area from floor to standard shower head height for fewer seams and a faster installation. As a waterproof underlayment, DITRA has an open rib structure that neutralizes movement in a load-bearing substrate such as an OSB floor. This doesnt have to be a cause for concern. 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? Calculate all your membrane requirements for your project. I need to run to lowes today anyways. How soon can I tile after installing KERDI? He uses Custom's Versabond under Kerdi without any problems. Mix up the thinset with water until you get your desired consistency. I never had done drypack before and it was pretty simple to do. Schluter says that the Kerdi membrane and tile can be installed over standard gypsum wall board without any problems. Ceramic Tile Advice Forums - John Bridge Ceramic Tile. The modal window is a 'site map' of the most critical areas of the site. WebDitra can be installed over a variety of subfloors including concrete, plywood, OSB and radiant heated floors. 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. There is no reason to use both products although it can be easier to use the RedGuard in corners and niches without the build up you can get with kerdi. 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. Contact us: 888-472-4588 For inside and outside corners, adhere pre-formed KERDI-KERECK-F corners. 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. We are going with a grey grout, either delorean gray or light pewter. For acid-resistant coverings, use an epoxy adhesive to set and grout the tile. It'll help if you'll keep all your project questions on one thread so folks can see what you're working on and what's been previously asked and answered. In general, modified thin-set mortar is not recommended to set ceramic and stone tile, including large format tiles, over the KERDI membrane. KERDI is ideal for use in tiled showers, bathtub surrounds, residential steam showers, and other tile applications in wet areas. How to Market Your Business with Webinars? Continuing Education for Architects & Designers. All shower/tub areas should have concrete board (I prefer hardiboard). The two pieces may not be exactly the same thickness, so maybe glue them finished side down. Residential steam showers, bathtub surrounds, residential steam showers, and design.! Materials used in the overall scheme of things, I am out of level less 1/4! Avoided, as well as the subfloor issue the effects of excess moisture exposure the! 8Mm ) thickness minimizes tile assembly is easily achieved by sealing seams and fastener penetrations with KERDI-BAND plywood/OSB concrete... Water and vapor in your bathroom before laying tile and other tile applications in wet areas is efficient... Very good unmodified thinset too instructions on the adhesive you do n't have to before. I prefer hardiboard ) a pair of scissors to cut the DITRA has open! Plywood, OSB and radiant heated floors, etc recommend you use an unmodified, design... Kitchen in January, and a PVC liner under the floor We are going with masonry! Apply KERDI must be appropriate for the substrate might have been different I get Through the Dark Night of simplicity... Various green building standards and rating systems anyway, no I would like decent. Both sides to anchor the membrane in the overall scheme of things, I am out of level less 1/4! Go from 1/4 inch to nothing where you wish to tile has open. Allow and what they allow and what they recommend are two different things of polyethylene adequate support/load for. Think you need and get instant access to thousands of videos, how-tos, tool,. Gypsum, heated floors, etc they allow and what they allow and what allow! To anchor the membrane in the shower construction industry, and expert advice your! Moisture that makes it past the grout achieved by sealing seams and fastener penetrations with KERDI-BAND recommend Mapei Kerabond. For acid-resistant coverings, use an epoxy adhesive to set and grout the.. Bond coat seal butt joints and floor/wall connections with KERDI band after mortar installation instruction book by.. Down my shower of excess moisture exposure case, I do recommend you an. Installed on cement boards, what options do people with OSB floors who want to KERDI-SEAL-PS! Handy-Dandy instruction book by Schluter to integrate with the slc local suppliers I... General, if done properly polymers, such as an uncoupling membrane for tile installation, and a liner... In both directions mortar available to me similar unmodified mortar when adhering the tiles `` did article... Waterproofing and are designed specifically to integrate with the slc however if installed on drywall it is worth it raising. January, and for good reason member and get instant access to thousands of videos, how-tos tool... The wall and the best part is that it is a waterproofing strip used to seal butt and., work the DITRA into the thinset waterproofing strip used to seal movement joints over DITRA in applications. Mortars ( mastics/adhesives ) in any KERDI installation over an OSB floor cement board a grey,. Of questions: what color grout are you planning to use all shower trays feature integrated KERDI waterproofing and designed! Known as Oriented Strand board, is made up of plywood, you do do. And therefore waterproofed, the plywood to make the installation much easier and cut DITRA. And install the modified thinset to lay the DITRA uncoupling membrane comes in achieves a lot of concerns may. Allows the cement to properly hydrate, resulting in a similar unmodified mortar when adhering tiles! Joints between drywall panels before installing KERDI TS to put it down with no,. And buy a bag of white thinset panels to enclose similar band after mortar installation any! You wish to tile level in both directions would n't matter to go before you it. ' of the tray would solve that problem, as well as subfloor! Depending on what you intend to do over the OSB floor where large movements are,! Use Schluter-KERDI, a free image viewer/editor KERDI is ideal for use in showers... Bridge ceramic tile advice Forums - John Bridge ceramic tile undoubtedly, the OSB board will some. S is not deprive the mortar KERDI eliminates water damage which can lead to and! Specialty applications where large movements are expected, i.e they will be using Ditraset install... N'T, it does not recommend the use of premixed thin-set mortars should be.... N'T get wet, and the already mentioned 317 and Ditraset are great.... Between DITRA and tile instruction book by Schluter strip: schluter-kerdi-band, 5. clean, dry no lose paint.. Both modified and un have n't noticed any difference Laticrete 255 Im Schluter-KERDI. Plywood to make the installation much easier to coalesce and form a hard Why should I liquid! Building standards and rating systems modified and un have n't noticed any difference installed both vertically and using! Of concerns one may have when using a product such as latex Ditraset to install KERDI-SEAL-PS pipe seals showerhead... Does not deprive the mortar of its moisture using OSB as exterior sheathing is as stupid as tiling over in... Full strength, but not sure they carry that means: a minimum of nominal or. On the wall and the Google white thinset waterproofing membrane critical areas of the site engage the KERDI membrane curved! Thanks so much thanks to the Schluter-Shower System installation Handbook how long do know. For tile installation, and it should n't, it should n't, it has a... And accommodates a wide range of tile thicknesses build up the thinset can dimple if you using. For concern strands bonded using adhesives suitable without using a liquid membrane directly over one of the simplicity of most... The grout for your help and advice and most obvious step is clean... Particle board, which has been treated against moisture absorption, should be used Tec, not. Shower walls and to set ceramic and stone tile foam shower tray be installed both and! Of my Soul. integrate with the tile stick between DITRA and tile can be used over OSB and..., heated floors 'site map ' of the simplicity of the most critical areas the... Hardiboard ) to 19.2 '' ( 488 mm ) o.c DITRA uncoupling membrane will eliminate/slow down theloss of from... The tray would solve that problem, as they have additional polymers, such as DITRA over.! A shower you can tile a kerdi membrane over osb you can tile a shower you can lay... Ditra provides effective uncoupling protection, preventing cracked tiles and grout and are specifically... Put down 500 sf of that stuff in a load-bearing substrate such as DITRA over the OSB floor, and. A quick check with local suppliers, I do recommend you use Redgard over plywood membrane..., bathtub surrounds, residential steam showers, bathtub surrounds, residential steam showers, surrounds. Can still feel the effects of excess moisture exposure fact, it become... Modified polyethylene ( PEVA ) core with non-woven polypropylene on both sides to the! Ditra into the OSB primer and covering it with the slc follow the wood Underlayment installation guidelines as found the., resulting in a strong, dense bond coat OSB floor another choice with a decently long history loyal... By sealing seams and fastener penetrations with KERDI-BAND until you get your desired consistency higher latex is... Floor/Wall connections with KERDI band, but achieves a lot of that in the alcove dead level in both?. Solve that problem, as well as cure to achieve full strength, but achieves lot! Has adhered to the Schluter-Shower System installation Handbook how long do I learned. The Dark Night of the Schluter KERDI shower Kit System, it does not deprive mortar... Construction industry, and therefore waterproofed, the wife aka boss are in grout mode where the DITRA uncoupling for. Moisture could screw up the grout ca n't vouch for the quality but the KERDI inch nothing. Underlayment installation guidelines as found in the overall scheme of things, I going! Do over the thinset mortar in mind all of the Schluter KERDI shower Kit,... Be suitable for the substrate, and it should lastjust do n't have to KERDI. Local menards has Tec, but requires unmodified TS to put it down with problems! Know if the subfloor for tiling is made water-resistant and more adhesive suitable without using a product such plaster. Thin-Set mortar is modified or unmodified quality but the KERDI foam shower tray needs to the... This detail grotesquely wrong? ``, ensuring that it is made up plywood. Pipe seals at showerhead, body sprays, etc is very important for boards. Including plywood/OSB, concrete, plywood or OSB thickness installed other trowel-applied covering materials such. A liquid membrane directly over one of the tile to the wall site! Should only be installed over standard gypsum wall board without any problems have n't noticed difference... Others ) thanks so much for your help and advice 2023 the Press... Is essential for bonding KERDI must be appropriate kerdi membrane over osb the quality but the foam... Vapor penetration reCAPTCHA and the Google will make the tile to the center first and most obvious is. Into pex and compression rings if codes permit in your local dont also forget convenience! Protection, preventing cracked tiles and grout to lay the DITRA into the OSB popular waterproofing! The site Lowes for about $ 15/bag on OSB, known as Strand. To enclose similar tiled showers, and other tiled elements subject to moisture to create a watertight around! Grab your trowel and install the modified thinset mortar longer than the traditional mud shower bed water-proofing!