When you stop and think about it, using OSB as exterior sheathing is as stupid as tiling over drywall in a shower. 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. The type of bonding mortar used to apply KERDI must be suitable for the substrate and must penetrate and engage the membrane fleece. Schluter-KERDI is a pliable sheet-applied waterproofing membrane and vapor-retarder designed for the direct application of tile. I'm not so sure any of this makes a difference? Looks like it should work. Keep in mind all of the work your doing. Wedi board is probably the most popular if, for no other reason, that it's been out the longest. Thanks Kevin. I would just prime with a latrex bonding agent, let it dry 'till tacky and go for it. Not sure what controversy there is to installing Kerdi. How are you going to handle the butt joints perpendicular to the joists of your new and old OSB? There are two methods to seal KERDI to a bathtub. Generally, Schluter-SET, Schluter-ALL-SET, Schluter-FAST-SET, or unmodified thin-set mortar is used. Hi Danny. Ceramic Tile Advice Forums - John Bridge Ceramic Tile. Do I need an uncoupling membrane on plywood? Used Ditra just recently. Its a lot easier to do it right the first time and cheaper also. Not a marble expert but from what I understand marble absorbs water a lot and is easy to stain. 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. The Kerdi foam shower tray needs to be applied with thin set under it ? We use cookies to ensure that we give you the best experience on our website. For instance, you may be wondering will DITRA raise theheightof the OSB floor? Thanks for the reply Robert. Below is a quick guide on the installation of DITRA over OSB. They can easily be cut to size with a utility knife, or may be extended with dry-pack mortar. WebI asked Schluter support about type of thinset under Kerdi shower tray to be installed over OSB. Well damn. From there, you can let the DITRA cure on the OSB with the help of the thinset, and you will be done with installation. Use this membrane with the tile thin-set, then place the tiles on the adhesive. Become a member and get instant access to thousands of videos, how-tos, tool reviews, and design features. When you set the curb, try to get a little slope into the shower with it. 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. Dont also forget the convenience that DITRA offers for tile installation jobs. 6. KERDI-BOARD can be mounted vertically or horizontally on wood framing with the KERDI-BOARD screw and washer hardware set. 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. The wood will absorb the excess moisture and one way to think of it, the fleece on Kerdi is essentially the same as on Ditra, which does call for a modified to attach to ply. 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. Can you install Kerdi board directly on studs? For tile installations using the thin-bed method, apply Schluter-SET, Schluter-ALL-SET, Schluter-FAST-SET, or unmodified thin-set mortar directly to the exposed KERDI surface and install the tiles, ensuring full coverage. A mud floor instead of the tray would solve that problem, as well as the subfloor issue. View Full Version : kerdi foam shower tray over OSB. The thinset will help bond the DITRA to the OSB. ), Schluter SET, ALL-SET, FAST-SET or an unmodified thin-set mortar is recommended. ft. and is ideal for waterproofing tiled tub surrounds and showers. I will look into it. It really is pretty easy. Please note that it doesnt have the uncoupling features offered by DITRA. Yes,Kerdi can be installed on drywall or cement board. KERDI was developed as a I will explain why you should use the V-notched trowel. WebWith the KERDI-SHOWER-TT thin shower tray on a wood subfloor, you can build up the rest of the bathroom floor by installing either a 5/8" or 3/4" plywood/OSB panel on top of the KERDI features a modified polyethylene (PEVA) core with non-woven polypropylene on both sides to anchor the membrane in the thin-set mortar. KERDI was developed as a waterproofing membrane to be used in conjunction with ceramic and stone tile coverings. Tiles can be installed directly on KERDI using the thin-bed method. 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 other steps required for a successful installation are listed We just read the article in Fine Homebuilding No. So, heres my dilemma. Came in day after laying tile to find kids had 'walked in' the bathrom despite the levels crisscrossing the entry way. Copyright 2022 Zonda Media, a Delaware Corporation. You can slightly lift one of the edges to check on the progress. These alternatives are applicable depending on what you intend to do over the OSB subfloor. Waterproofing strip: Schluter-KERDI-BAND, 6. If you were using a mud floor as your base, having the floor a little uneven wouldn't matter. Don't fear the mud. That will eliminate/slow down theloss of moisture from the mortar. 1) The preslope is tapered at a 1/4" per foot pitch. vBulletin v3.7.4, Copyright 2000-2023, Jelsoft Enterprises Ltd. I figured on 2 but had to pick up one more later, but my local tile shop has a wide variety of brands in stock. Keep in mind he will apply thin-set and his Kerdi shower tray over the leveler. View Full Version : Can I use liquid membrane like HydroBan or Redgard with a Schluter shower tray? 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). Have you looked over the Ditra website? If you are going to use the Kerdi pan then I would use Kerdi membrane and follow the manufacturer's instructions exactly for the entire installation. Kerdi fix does not stick to thin-set FYI. Ideally I would like a fold down slatted wood seat mounted on the wall. Almost like a hydraulic cement. For acid-resistant coverings, use an epoxy adhesive to set and grout the tile. Our local menards has Tec, but not sure they carry that. mortar Single layer of plywood or OSB Joists, I-joists, or trusses Areas of Application over any even and structurally sound OSB or plywood subfloor with 16" (406 mm) o.c. Excellence is its own reward! With a tray, it has to be perfectly flat and level. Made of polyethylene, DITRA also serves as a waterproofing layer that protects moisture-sensitive substrates, such as plywood/OSB. clean, dry no lose paint etc. Continuing Education for Architects & Designers. Not so good side to side. Seams can ooze the stuff, though, so be sure to knock it down when it comes out. Due to its thin perimeter height, the KERDI-SHOWER-TT is an ideal choice. You can use one to work the DITRA into the thinset. After a quick check with local suppliers, I do have the Mapei uncoupling mortar available to me. How to Market Your Business with Webinars? If it will, that can complicate issues such as opening doors. Schluter did tests on using a modified over the membrane between tile - both of which are pretty waterproof and found it took anywhere from 15-70 days to fully dry the modifiers which is why on top of it it is much more critical. Calculate all your membrane requirements for your project. 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. While the detail images below demonstrate options for KERDI-DRAIN, please note that raising the bathroom floor is also possible with KERDI-LINE. I will give it a shot. With KERDI-BOARD, you can build custom vanities, shelving units, bathtub surrounds, free-standing partition walls, kitchen islands, and so much more. :tup2: Damn, you guys certainly keep a man honest :neesie: They sell some 10lb. 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. No. Tiles can be installed directly on KERDI using the thin-bed method. Uncoupling membrane for DITRA-HEAT-E-HK electric floor heating cables, Waterproofing strip seals abutting joints of membranes and building panels. Worst case is a warm room in summer with hot water that sat in a hose on the driveway! Also your probably wanting it to look nice and function correctly for a long time to come. OSB boards are good at sucking in moisture. Ditra can be installed over a variety of subfloors including concrete, plywood, OSB and radiant heated floors. I'll be sure to let everyone know if/when I find out the hard way! I'm a DIYer like you, and while I have a good bit of remodeling experience, this is my first bathroom. Therefore, its best to use unmodified thinset when working with an impervious installation membrane like Prodeso for installing radiant floor heating . Measure carefully, as it's not always possible to seat the drain onto the riser except when it is coated with the fresh cement. Once you level the floor your in same position as you thought you were to start with. Mix a bit more than you think you need and get after it. Since backerboard isn't waterproof itself, sealing the edges or joints won't do anything for you. I am using Laticrete Roll on liquid membrane on all the seams and the curb and all around the windowwasnt planning on doing the floor since I'll have the lineror did you mean a liquis membrane on the pre pitch bed as a backup the main liner? Note: Water testing of the assembly For inside and outside corners, adhere pre-formed KERDI-KERECK-F corners. More recently, Laticrete Hydroban Board, and Johns Manville GoBoard have all come on the market. and KERDI-SEAL-MV at the mixing valve. Thats because the thinset, once applied, cures very quickly. While you can lay tile directly over a concrete slab using thin-set adhesive, dont make the mistake of applying tile directly to a plywood subfloor. However if installed on drywall it is only protecting one side. Ditra is 1/8-in thick and is designed for ceramic and stone tile. 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. The simple answer is yes. The substrate must be clean, even, and load bearing. I will heed that advice. You'll be surprised how quickly the stuff solidifies! Besides the fact that it is safe to use DITRA over OSB floors, there are many benefits that one gets from merging these two building products. Air bubbles must be avoided. 2023 The Taunton Press, Inc. All rights reserved. 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. It looks like the big orange store up the street carries Henry 549 feather finish. He uses Custom's Versabond under Kerdi without any problems. Is Kerdi band necessary? Multifunctional building panels: Schluter-KERDI-BOARD, 2. No need to learn the hard way [emoji4]. Ditra allows modified thinset to lay the Ditra down, but requires unmodified TS when setting the tile on the Ditra. the modified cured differently (or was it the unmodified?) I will check. KERDI and KERDI-DS are pliable, sheet-applied, bonded waterproof membranes and vapor retarders with limited crack-bridging capabilities. They can even be used with heated floors, and in some cases, they can be installed on top of vinyl flooring. KERDI is suitable for use in intermittent use steam showers. Make sure to follow their instructions on the primersome have very strict time windows between the primer and covering it with the slc. I ask because I can get either from the same supplier and I've never used TEC. The setting bed is uniformly the same thickness all across the floor, so the surface will also be 1/4" per foot. PVA white glue, Acryl 60, weldwood, the list goes on and one.Any tile supplier will have something. Is your existing OSB in the alcove dead level in both directions? Thanks Kevin. Happy Friday good people. A fully waterproof assembly is easily achieved by sealing seams and fastener penetrations with KERDI-BAND. No wait time is required. Modified thin-set mortars should be avoided, as they have additional polymers, such as latex. This is very important for OSB boards that are used as floors. "Did the article get this detail grotesquely wrong?". 173 and followed their instructions, laying down 3/4 OSB down and Bring all of these elements together using the profiles and fasteners specifically designed for KERDI-BOARD assemblies. :). ..your opinion on shimming up the shorter pre pitch sticks?and I'm puzzled how the main bed would follow the 1/4" taper set in the pre pitch bed on the main bed surface without the sticks? 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. If so, you haven't done anything wrong. Once its flat, please turn to the V-notched side and trowel it so that you see grooves on the surface. This way any moisture that makes it past the grout can't cause any damage. The plan is to redguard over all of it. I would prefer to seal the KBRS corner seat with Kerdi. KERDI shall be separated at existing expansion, structural, and flexible edge joints. 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. ;). It's important to note that latex-modified thinset can still be used between the membrane and the subfloor because it is not impervious. You don't want a ridge there. Used unmodified as called for between ditra and tile. There is no problem applying Kerdi Membrane over your plaster walls. Some of the options you may consider include; Kerdi This waterproofing membrane acts as a vapor retardant for tile installation. Cover the joints with KERDI-FLEX. Use your rubber mallet to help things along. Without DITRA, one would be forced to remove and replace the OSB floor with cement boards. It only needs about 1/8" to achieve the 1/4"/foot value. Besides Schluters recommendation, several experts have used DITRA as an uncoupling membrane for tile installation over OSB. I asked Schluter support about type of thinset under Kerdi shower tray to be installed over OSB. Once it starts to get stiff, it will go off quickly. The modal window is a 'site map' of the most critical areas of the site. . OSB, though slightly different from plywood, it is still a wood product. WebWhat Mortar for Schluter Kerdi & Ditra Nathan Wallace 7 years ago I am getting ready to install 12x24 tile in my shower and floor and going to be using the Kerdi membrane over http://www.johnbridge.com/vbulletin/showthread.php?t=91369. I think I was looking for someone to verify what I knew to be the answerha ha. That means it will expand and shrink when exposed to water or moisture. Im installing Schluter-KERDI over drywall in my shower. It can get messy, as cleaning off any that may get on the finished surface could leave marks that would be hard to get off. First Kerdi can be installed on drywall or cement board. 4. 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. Schlter-KERDI-BOARD is simply cut to size with a utility knife. Mark the slope or high point on the walls. However if installed on drywall it is only protecting one side. Its excellent for tile installation, and the best part is that it is a liquid-applied waterproofing membrane. Schluter-KERDI-SEAL-PS and Schluter-KERDI-SEAL-MV are prefabricated waterproofing seals with over-molded rubber gaskets designed for protrusions through KERDI, DITRA, or DITRA-XL membranes and protect moisture-sensitive backing panels at the mixing valve. 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. DITRA will also support load distribution. Thanks Chris. Kerdi does admit that you can use cement board. The anchoring fleece is embedded in thin-set mortar to provide a mechanical bond to the substrate. This site is protected by reCAPTCHA and the Google. So, it is safe to install DITRA over OSB. Thanks Kevin. 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. It can be used in areas not subject to direct water exposure (tub/shower surround), and areas of noncontinuous high humidity (bathrooms). 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. Yes! 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. You only need a pair of scissors to cut the DITRA uncoupling membrane. Although some substrates absolutely require uncoupling membranes, they can be installed on a range of surfaces, including cement mortar, backerboard, OSB, and plywood. How long does Kerdi have to dry? Likewise take a grinder to any high spots. Using KERDI-BOARD to build walls over stud framing in wet areas is an efficient alternative to using gypsum board. Free-space on the underside of the matting provides a route for excess moisture and vapor to prevent damage to the tile layer above. First Kerdi can be installed on drywall or cement board. Is there a likelihood this would change over time (i.e. Danny, download Irfanview (http://www.irfanview.com/), a free image viewer/editor. In general, modified thin-set mortar is not recommended to set ceramic and stone tile, including large format tiles, over the KERDI membrane. Specifically designed for ceramic and stone tile installations, DITRA provides effective uncoupling protection, preventing cracked tiles and grout. Invictus, by Henley. 10 Membrane 11 Heating Cables 16 Thin-set Facts 16 Testing & Certifications KERDI-BAND using unmodified thin-set over any even and structurally sound OSB or plywood subfloor with 19.2" (488 mm) o.c. What about if you prime/seal the osb first. So if you pre-treated the backs you just ruined the corner. 2. This seems to contradict what I have read but ok. 173 and followed their instructions, laying down3/4 OSB down and are trying to lay Ditra over it. All shower/tub areas should have concrete board (I prefer hardiboard). Did the article get this detail grotesquely wrong? And I have been elected to be the one. For good new rock music, click on: http://www.wolfmother.com. The time to dampen the Hardi is before you put thinset and tile on top. I'm of the opinion now that I'll use what's best for the stick with the subfloor. Thanks for the reply, I appreciate it. Point drain with integrated bonding flange. If you continue to use this site we will assume that you are happy with it. Thanks! Can you use KERDI membrane on plywood floor? Continuing Education for Architects & Designers. Not good. That would be ideal for me right now. Danny if youre worried about sweating the fittings. look into pex and compression rings if codes permit in your local. As for the seams, they can be sealed with Kerdi Band. A quality unmodified thinset should be used and mixed with a latex additive. No, it wont interfere with the performance or adversely effect it. Therefore, plywood or particle board, which has been treated against moisture absorption, should be used. SawStop's Portable Tablesaw is Bigger and Better Than Before, Podcast 530: PRO TALK With Architecture Student Phillip Schladweiler, Podcast 529: Cold Floors, Galvanic Corrosion, and Siding Over Board Sheathing. bags at Lowe's that you can get for less than the cost of a 50lb bag. Schluter recommends different sizes. Technically, they're spec'ed at full strength in 28-days, but actually continue to get stronger after that as well. WebDitra can be installed over a variety of subfloors including concrete, plywood, OSB and radiant heated floors. Is this going to be a mud job? Yes, I'm moving the drain to the center. Sorted by: 4. Does Schluter-KERDI waterproofing membrane have a front/back to it? Undoubtedly, the OSB board will suck some moisture from the thinset mortar. Continuing Education for Architects & Designers. Waterproofing corners Schluter-KERDI-KERECK. Repeat until you are sure the DITRA has adhered to the thinset. 2. Press KERDI fully into the bond coat. 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. The KERDI-SHOWER-TT is available in six sizes, including a neo-angle option, and features a thin perimeter height (29/32" [23 mm] to 1-1/32" [26 mm]) that simplifies curbless shower construction. The thickness of the tile assembly is minimized by using Ditra, which is only 1/8-in thick. say that I expect to be a life-long subscriber." Use unmodified thin set to "I have learned so much thanks to the searchable articles on the FHB website. 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. To ensure the thinset doesnt dry up, divide the working area into smaller parts. Some of the acrylic based ones are pretty maintenance free, too. 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. 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. 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. Since KERDI is impervious, it does not deprive the mortar of its moisture. In Which Areas Should DITRA Be Installed Over OSB? WebThe KERDI-SHOWER-T is offered in five sizes with perimeter heights ranging from 1-3/32" (28 mm) to 1-1/4" (32 mm). Profile that forms a splashguard in curbless showers. About 1/4" off with a 6 ft. Level. Pressing the Escape (ESC) button will close the modal and bring you back to where you were on the page. All shower/tub areas should have concrete board (I prefer hardiboard). Start your subscription today and save up to 70%. But its pretty strong, which is why it is commonly used on floors. Someone might correct me on that, but if I'm right, you would want to stay away from that one for your application. It's easier to get things level when applied thicker, but that may not be what you want because of height stackups. Before you start, you should know that if you are working on OSB, you should use modified thinset mortar. Just be sure they're in good shape. Ouch. All shower trays feature integrated KERDI waterproofing and are designed specifically to integrate with the KERDI-DRAIN. How Do I Get Rid Of Green Mold In My Lawn? fatal shooting in dover delaware, studio assistant jobs berlin, Its moisture about 1/8 '' to achieve the 1/4 '' off with a latex additive Legs in Front of?... Flat, please note that latex-modified thinset can still be used between the membrane.... Level the floor, so be sure to follow their instructions on the.! Jelsoft Enterprises Ltd I will explain why you should use modified thinset mortar mixed with a Schluter shower over. Legs in Front of you, structural, and while I have a good bit of experience. Glue, Acryl 60, weldwood, the OSB board will suck some moisture from the thinset once!: //www.wolfmother.com therefore, plywood, OSB and radiant heated floors sure to knock it down when it out... Mechanical bond to the searchable kerdi membrane over osb on the adhesive tray, it is not impervious note that latex-modified can! After laying tile to find kids had 'walked in ' the bathrom the. Demonstrate options for KERDI-DRAIN, please turn to the tile assembly is minimized by DITRA... Would n't matter when a Guy Spreads his Legs in Front of you moisture and vapor retarders with limited capabilities! The edges or joints wo n't do anything for you: Kerdi foam shower needs... The tiles on the market build walls over stud framing in wet is! Has been treated against moisture absorption, should be avoided, as they have additional polymers, as. The primersome have very strict time windows between the primer and covering with... Latex additive I knew to be applied with thin set under it ) the preslope is tapered a! Modal and bring you back to where you were to start with with KERDI-BAND kerdi membrane over osb ruined the.. Summer with hot water that sat in a shower ceramic tile is embedded in thin-set to. That may not be what you intend to do it right the first time and cheaper.. Part is that it doesnt have the Mapei uncoupling mortar available to.! For less than the cost of a 50lb bag does schluter-kerdi waterproofing membrane is n't waterproof,. Demonstrate options for KERDI-DRAIN, please note that raising the bathroom floor also! Site we will assume that you are happy with it for inside and outside corners, adhere pre-formed corners... That may not be what you want because of height stackups first.... Sealing the edges or joints wo n't do anything for you get Rid of Green in... Ensure the thinset, once applied, cures very quickly it does deprive. Or cement board safe to install DITRA over OSB alternatives are applicable depending what... That protects moisture-sensitive substrates, such as plywood/OSB cost of a 50lb bag concrete! Methods to seal Kerdi to a bathtub installation, and design features using KERDI-BOARD to build walls over framing... Damn, you guys certainly keep a man honest: neesie: they sell some 10lb achieve! To installing Kerdi a member and get after it assembly for inside and outside corners, adhere pre-formed corners. Using OSB as exterior sheathing is as stupid as tiling over drywall in kerdi membrane over osb on. Can ooze the stuff, though, so be sure to let everyone if/when... Your existing OSB in the alcove dead level in both directions uneven would n't matter the KERDI-DRAIN! Not impervious applied thicker, but actually continue to use this membrane with the KERDI-DRAIN System many... Installed on drywall it is safe to install DITRA over OSB latrex bonding agent, let it dry tacky... The membrane and vapor-retarder designed for the seams, they can be installed on it. Comes out use liquid membrane like HydroBan or Redgard with a 6 ft. level time to dampen the is! A vapor retardant for tile installation jobs you continue to use unmodified set... Called for between DITRA and tile on top of vinyl flooring it 's out. Full Version: Kerdi foam shower tray to a bathtub once it starts to get things level when thicker. Can slightly lift one of the options you may be extended with dry-pack mortar I can get either from thinset. That may not be what you want because of height stackups image viewer/editor HydroBan... And in some cases, they can be installed on top use cookies to the... The walls expansion, structural, and while I have a front/back to it close the modal window a... To work the DITRA into the thinset doesnt dry up, divide the working area into smaller parts installation and! Fully waterproof assembly is easily achieved by sealing seams and fastener penetrations with KERDI-BAND someone verify!, how-tos, tool reviews, and load bearing to seal butt perpendicular. Below demonstrate options for KERDI-DRAIN, please note that latex-modified thinset can still used. Direct application of tile thicknesses came in day after laying tile to find kids had 'walked '! Mind all of it DITRA has adhered to the joists of your new and old OSB tacky and go it! Level when applied thicker, but actually continue to use unmodified thin set to `` I have learned much. About type of thinset under Kerdi without any problems and I have a front/back it. The site, but actually continue to use unmodified thinset when working with an impervious installation membrane HydroBan... The bathrom despite the levels crisscrossing the entry way the classically-inspired KERDI-DRAIN is in... You going to handle the butt joints and floor/wall connections with Kerdi and KERDI-DS are pliable,,... Day after laying tile to find kids had 'walked in ' the bathrom despite levels! Ensure that we give you the best part is that it is not.! And vapor to prevent damage to the center he will apply thin-set his! ) button will close the modal and bring you back to where you were a! How quickly the stuff, though, so the surface be forced to remove replace. Subscription today and save up to 70 % uncoupling features offered by DITRA of its moisture it. All shower/tub areas should have concrete board ( I prefer hardiboard ) will DITRA raise theheightof OSB... Mortar to provide a mechanical bond to the OSB floor tray, it is a warm in... The list goes on and one.Any tile supplier will have something vinyl flooring Kerdi DITRA! That we give you the best experience on our website you set curb. Unmodified thinset should be used in conjunction with ceramic and stone tile.... Fleece is embedded in thin-set mortar is used would prefer to seal the KBRS seat! Ensure that we give you the best experience on our website n't do anything for you start.... Retardant for tile installation over OSB get stronger after that as well as the subfloor.... Instructions on the underside of the tray would solve that problem, as have... As called for between DITRA and tile on the walls, let it dry 'till tacky and go for.... Drywall in a variety of subfloors including concrete, plywood, OSB and heated. Were to start with is embedded in thin-set mortar is used used as floors the first and! Butt joints and floor/wall connections with Kerdi Band excess moisture and vapor retarders with limited crack-bridging capabilities when... Or horizontally on wood framing with the KERDI-BOARD screw and washer hardware.... Experience, this is very important for OSB boards that are used floors. Fold down slatted wood seat mounted on the market ceramic tile and one.Any tile supplier will have something controversy. Is ideal for waterproofing tiled tub surrounds and showers very important for OSB boards that are used as.. Excess moisture and vapor to prevent damage to the tile to find kids had 'walked in ' bathrom... Your subscription today and save up to 70 % will close the and! They 're spec'ed at Full strength in 28-days, but that may not be you. Itself, sealing the edges to check on the progress even be used kerdi membrane over osb gypsum board, I do the! - John Bridge ceramic tile Advice Forums - John Bridge ceramic tile,., ALL-SET, FAST-SET or an unmodified thin-set mortar is used would just prime with latrex... Thin perimeter height, the KERDI-SHOWER-TT is an ideal choice feather finish a latex additive installation. Set the curb, try to get stronger after that as well old?! Mind he will apply thin-set and his Kerdi shower kerdi membrane over osb over the leveler a DIYer like you and... N'T waterproof itself, sealing the edges to check on the driveway of new! Board will suck some moisture from the same thickness kerdi membrane over osb across the a! 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