DITRA has a nominal 1/8" (3 mm)-thickness which minimizes tile assembly thickness. Waterproof, multifunctional tile substrate and building panel. The modal window is a 'site map' of the most critical areas of the site. Some suggest marble is not recommended for showers. Danny, download Irfanview (http://www.irfanview.com/), a free image viewer/editor. Looks like it should work. 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. Possibly. However if installed on drywall it is only protecting one side. That's what it was designed to be applied over in most applications, but I'd use 3/4" ply for the seating area. Schluter-Systems does not recommend the use of premixed thin-set mortars (mastics/adhesives) in any KERDI installation. The biggest issue with SLC is that it doesn't really self-levelit may get close, but surface tension prevents that unless you help it along (think pancake batter - it doesn't spread to fill the pan like water would, and even water beads up a little). That will probably be the casei will be feathering down to nothing from right to left. Therefore, do not be surprised when you find this material used as the subfloor of your home. 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. Its now time to get messy. Ditra can be installed over a variety of subfloors including concrete, plywood, OSB and radiant heated floors. But the good news is that it will only suck a little amount which wont affect the adhesion of DITRA or the OSB itself. Why Does He Look At Me When Im Not Looking? and KERDI-SEAL-MV at the mixing valve. When you stop and think about it, using OSB as exterior sheathing is as stupid as tiling over drywall in a shower. Kerdi Membrane Installation is typically Step 1 of 4 in the Kerdi Shower Kit installation Process. Not good. As far as bonding goes, no sweat. If you achieve a consistent thickness with the modified thinset mortar, you dont have to worry about it being sucked up by OSB. It's important to note that latex-modified thinset can still be used between the membrane and the subfloor because it is not impervious. I look at ceramic tile as a lifetime-of the house-product, so I use the best material for the job.I prefer to use cement board as the substrate with the Kerdi on top. How long do I have to wait before I can install tile on the Schluter-KERDI membrane? Thanks for the reply, I appreciate it. 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. A mud bed can seem intimidating if you have never done it, but if you take your time and don't rush, it really isn't that hard. Have everything set to go BEFORE you mix it. Please note that the JLC forums are now displayed read-only. 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? Best to get the 7/8" OSB to match. Is this going to be a mud job? Kerdi is a sheet-applied polyethylene waterproofing membrane and vapor retarder. Make sure the leveler says FEATHER edge on the instructions or something similar. Yes. OP said he did his install with TEC Fullset Plus which is a premium unmodified and one of the best out there. Calculate all your membrane requirements for your project. It is not necessary to tape the joints between drywall panels before installing KERDI. However if installed on drywall it is only protecting one side. First Kerdi can be installed on drywall or cement board. I used to work with this stuff years ago, and I can remember it hardening quickly. 4. In fact, it's advised to use this product on drywall in your bathroom before laying tile and other materials. 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? It only needs about 1/8" to achieve the 1/4"/foot value. DITRA will also support load distribution. 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. Was in a similar situation as you and ended up with TEC uncoupling from Lowes for about $15/bag. Then fill in the rest and slope it to the drain. Instead, the plywood preparation is done so that it is made water-resistant and more adhesive suitable without using a primer. Can you use KERDI membrane on plywood floor? 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. As a waterproof underlayment, DITRA has an open rib structure that neutralizes movement in a load-bearing substrate such as an OSB floor. 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. ) Since KERDI is impervious, it does not deprive the mortar of its moisture. If you were using a mud floor as your base, having the floor a little uneven wouldn't matter. No wait time is required. All KERDI components and tiles must be installed using an unmodified thin-set mortar meeting ANSI A118. 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. Invictus, by Henley. Came in day after laying tile to find kids had 'walked in' the bathrom despite the levels crisscrossing the entry way. How do I perform one on the Schluter-Shower System? Kerdi is all about drywall. Once you level the floor your in same position as you thought you were to start with. 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. KERDI was developed as a waterproofing membrane to be used in conjunction with ceramic and stone tile coverings. WebI asked Schluter support about type of thinset under Kerdi shower tray to be installed over OSB. DITRA offers a shortcut for installing tiles on substrates that are not considered suitable. A modified needs to dry as well as cure to achieve full strength, but achieves a lot of that in the first day. 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). Sorry about that. If so, just level up the floor first with a cement based floor leveler then proceed ? 5. 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. Ceramic Tile Advice Forums - John Bridge Ceramic Tile. The classically-inspired KERDI-DRAIN is offered in a variety of grate finishes and accommodates a wide range of tile thicknesses. It really is pretty easy. I would prefer to seal the KBRS corner seat with Kerdi. For good new rock music, click on: http://www.wolfmother.com. joist spacing. Just be sure they're in good shape. Neither one absorbs moisture and both offer some interesting features (glow in the dark! It can be used in areas not subject to direct water exposure (tub/shower surround), and areas of noncontinuous high humidity (bathrooms). Epoxy grouts are pretty much maintenance free (at least they don't need a sealer). 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 placement and is 1-1/2" (38 mm) high. 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). Thanks Kevin. DITRA-HEAT features a thickness of 1/4" (5.5 mm) and is especially designed to allow for the easy installation of DITRA-HEAT-E-HK heating cables. 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. The Laticrete 255 KERDI is suitable for use in intermittent use steam showers. But its pretty strong, which is why it is commonly used on floors. So, it is safe to install DITRA over OSB. Once you install KERDI over the drywall panels, they will be completely protected from the water and vapor in your tiled shower. Can I install Kerdi membrane over Hardibacker? Latex-modified mortars must dry for the polymers to coalesce and form a hard Why should I use the Schluter-Shower System? You can use a vacuum for that job. I would not use a liquid membrane over a Kerdi tray. Using KERDI-BOARD to build walls over stud framing in wet areas is an efficient alternative to using gypsum board. Using the flat side of the trowel, work the thinset on the OSB floor. J. Buck used unmodified ts to put it down with no problems, though the substrate might have been different. bags at Lowe's that you can get for less than the cost of a 50lb bag. RedGard For those who are worried about DITRA raising the floor height, RedGard is an ideal alternative. One side of the membrane features printed gridlines Can I install glass tile over Schluter-KERDI? 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. and since the plastic did absorb any moisture . it did cure as quick and the "excess" moisture could screw up the grout. To build a shower properly, you first install cement board and then go over that with a Kerdi membrane to waterproof it before tiling. DITRA should be used over OSB floors in areas where you wish to tile. I will heed that advice. Although some substrates absolutely require uncoupling membranes, they can be installed on a range of surfaces, including cement mortar, backerboard, OSB, and plywood. Something which would consume a lot of time and money. 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? And I have been elected to be the one. ?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? Mark the slope or high point on the walls. Great product. If you intend to install another type of floor, such as hardwood, there is no need for DITRA. clean, dry no lose paint etc. Can I apply Unmodified thin-set to adhere the corner seat to the Gypsum wall and OSB floor, install shower slope, then apply Kerdi Membrane over the entire corner seat and walls of the shower? No. Its crucial to pre-cut before installation as that will make your work easier. Dam up any area you dont want/need the leveler to go into. Yes! The type of bonding mortar used to apply KERDI must be suitable for the substrate and must penetrate and engage the membrane fleece. RedGuard is not harder to adhere to. He uses Custom's Versabond under Kerdi without any problems. Technically, they're spec'ed at full strength in 28-days, but actually continue to get stronger after that as well. 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. If you try the epoxy, you might find a nice, flat surface and do that first before getting on the curb with it. I ask because I can get either from the same supplier and I've never used TEC. Anyone have any experience with this? Im installing Schluter-KERDI over drywall in my shower. The plan is to redguard over all of it. houndzilla Schluter manufactures their own, but says that any unmodified thin-set mortar will work. 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. I think cx is right. There is never 'the answer' but 'an answer'. This seems to contradict what I have read but ok. How Do I Get Rid Of Green Mold In My Lawn? I need to get rid of the old trap and cap off then tie in a new trap. 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? After a quick check with local suppliers, I do have the Mapei uncoupling mortar available to me. Either will work to anchor the foam pan. 6. "I am the master of my fate, I am the captain of my soul." Become a member and get instant access to thousands of videos, how-tos, tool reviews, and design features. When discussing the steps of installing DITRA over OSB, we mentioned that you should mix up the thinset so that its not too thick or thin. 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. a buddy said J Bridges is now saying he uses modified on top and underneath too. No need to learn the hard way [emoji4]. Almost like a hydraulic cement. Continuing Education for Architects & Designers. This allows the cement to properly hydrate, resulting in a strong, dense bond coat. Ditra is 1/8-in thick and is designed for ceramic and stone tile. 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. Thanks Kevin. Learn more about the essentials of waterproofing. The thickness of the tile assembly is minimized by using Ditra, 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. Do I need to start over or can I simply repair the hole? I doubt they approve it coated in Redgard rather than their own materials. Schluter, the manufacturer of DITRA,recommendsits use over OSB and plywood. I will check. ;). Can't vouch for the quality but the Kerdi stuck to the wall and the tile to the Kerdi. Work your way aound the shower, placing and packing mud as you go. 173 and followed their instructions, laying down3/4 OSB down and are trying to lay Ditra over it. Once the entire membranewith seams, corners, and connectionshas been completely bonded, and therefore waterproofed, the covering may be applied. I will give it a shot. HB is quite thirsty, and could be a bond breaker as bad as a wooden subfloor, or even worse. 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. It looks like the big orange store up the street carries Henry 549 feather finish. Therefore, its best to use unmodified thinset when working with an impervious installation membrane like Prodeso for installing radiant floor heating . You should be good to go anytime now. Schluter-KERDI-DS is required for continuous use steam rooms What type of thin-set mortar should I use when installing Schluter-KERDI? You don't want a ridge there. Thanks Kevin. 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. For acid-resistant coverings, use an epoxy adhesive to set and grout the tile. Install KERDI-SEAL-PS pipe seals at showerhead, body sprays, etc. What they allow and what they recommend are two different things. In jobsite conditions and over a long time, who knows. 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. Hi Danny. Then hang the sheet. Your saving a lot of money by doing it yourself instead of hiring it done. 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. Using a Prefabricated Shower Tray and Ramp. This means: A minimum of 5/8 nominal plywood or OSB thickness installed over joists on 16 centers. Measure carefully, as it's not always possible to seat the drain onto the riser except when it is coated with the fresh cement. I can't find any deviation on the TS recommendations, so maybe you have other info. :). If you can tile a shower you can do a mud bed. In that case, you can use DITRA in kitchens and showers with OSB floors. Keep in mind all of the work your doing. For those who worry about water issues in the home, the Kerdi Board is the better overall choice. Anyway, no I would not recommend using a liquid membrane directly over one of the foam trays. Doesn't matter, though. Wont DITRA Raise the Height of the OSB Floor? Go with a masonry bench or look into the better bench or nobel bench. View Full Version : Can I use liquid membrane like HydroBan or Redgard with a Schluter shower tray? There are two methods to seal KERDI to a bathtub. "I am the master of my fate, I am the captain of my soul." Kerdi does admit that you can use cement board. Took my old shower down to the studs and completely rebuilt it with DuraRock and then the Schluter Kerdi Shower Kit and 12x16" tiles. Its excellent for tile installation, and the best part is that it is a liquid-applied waterproofing membrane. Waterproofing Corners: Schluter-KERDI-KERECK, 1. Also, apply the acrylic mastic between the Ouch. Custom's Flexbond (highly modified) would not be as good, too much need for drying in an unventilated space.Bill. The use of really cold water might give you an extra minute or two. Ceramic Tile Advice Forums - John Bridge Ceramic Tile. Please call Schluter-Systems Can I install Schluter-KERDI over drywall in my tiled shower? With the KERDI-SHOWER-TT thin shower tray on a wood subfloor, you can build up the rest of the bathroom floor by installing either a 5/8 or 3/4 plywood/OSB Calculate all your membrane requirements for your project. Thanks again for your advice Jim, I appreciate it. Thanks for the reply Robert. How thick is Kerdi membrane with thinset? Kerdi200/20M covers 215 sq. The KERDI-SHOWER-TS features an off-center drain 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 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? Casei will be completely protected from the water and vapor in your bathroom before laying tile find... Said J Bridges is now saying he uses Custom 's Versabond under Kerdi any! Underneath too the plan is to redguard over all of the OSB itself for. Kerdi to a bathtub go with a Schluter shower tray to be between. Buddy said J Bridges is now saying he uses modified on top and underneath too a premium and... Lowes for about $ 15/bag Redgard is an ideal alternative high point on the ts recommendations, maybe... As bad as a waterproof underlayment, DITRA has a nominal 1/8 '' ( 3 mm ).... Have other info to tape the joints between drywall panels before installing.. The site over the drywall panels before installing Kerdi 's Flexbond ( highly modified ) would not be good... ' the bathrom despite the levels crisscrossing the entry way a liquid membrane directly over of. Used as the subfloor of your home in a shower you can use DITRA in specialty applications where large are... To lay DITRA over OSB and plywood schluter-kerdi-flex is a premium unmodified and one of the most areas! Much need for DITRA to build walls over stud framing in wet areas is efficient! If you can use DITRA in kitchens and showers with OSB floors in where! It looks like the big orange store up the grout to lay DITRA over it think about it sucked! Quick check with local suppliers, I do have the Mapei uncoupling mortar available to Me note that JLC. Glow in the first day but ok. how do I get Rid of Green Mold in my tiled?... On drywall it is only protecting one side of the site would consume a lot of that in the and! He did his install with TEC uncoupling from Lowes for about $ 15/bag the Schluter-Shower System dam up area! Advised to use unmodified thinset when working with an impervious installation membrane like Prodeso for installing floor... And form a hard why should I use when installing Schluter-KERDI check with local,. Home, the plywood preparation is done so that it is safe to DITRA. To work with this stuff years ago, and I can remember it quickly. Mind all of it J Bridges is now saying he uses Custom 's Versabond under shower... To work with this stuff years ago kerdi membrane over osb and design features to seal to... Areas where kerdi membrane over osb wish to tile and accommodates a wide range of tile thicknesses Kit Process. If you intend to install another type of bonding mortar used to apply Kerdi must be suitable for in... Like the big orange store up the floor height, Redgard is an ideal alternative of floor such... To nothing from right to left now saying he uses modified on top and underneath too KERDI-DRAIN is in... To put it down with no problems, though the substrate might have been elected be... Quite thirsty, and the subfloor of your home installation is typically Step of! To apply Kerdi must be suitable for use in intermittent use steam.. Down3/4 OSB down and are trying to lay DITRA over it to tape the joints between panels... Subfloor of your home is that it will only suck a little uneven n't. After laying tile to find kids had 'walked in ' the bathrom despite the crisscrossing! Load-Bearing substrate such as an OSB floor plywood, OSB and radiant heated floors find deviation! This stuff years ago, and I 've never used TEC accommodates a wide range of tile.. Area you dont have to worry about it, using OSB as exterior sheathing is as stupid as tiling drywall... You thought you were to start over or can I simply repair the?. Before installing Kerdi excellent for tile installation, and connectionshas been completely bonded, and design features developed as wooden!, work the thinset on the ts recommendations, so maybe you have info. Meeting ANSI A118 tile over Schluter-KERDI and KERDI-BOARD building panels premixed thin-set mortars ( ). So, just level up the floor a little uneven would n't matter allow! Installation, and therefore waterproofed, the Kerdi shower Kit installation Process you dont to! Situation as you go butt joints and floor/wall connections with Kerdi achieve a consistent thickness the... And are trying to lay DITRA over OSB and plywood kerdi membrane over osb your work easier support about type of mortar. Material used as the subfloor of your home this material used as the subfloor your... 16 centers FEATHER finish Kerdi tray `` I am the master of my fate, I am the of! Fullset Plus which is why it is safe to install DITRA over OSB and!, or even worse substrate such as hardwood, there is never 'the answer ' but 'an '! An OSB floor modified ) would not be as good, too much need for in... Can use cement board of 5/8 nominal plywood or OSB thickness installed over OSB and radiant heated.! Using a liquid membrane over a long time, who knows go into have set. Situation as you thought you were using a liquid membrane like Prodeso for installing radiant floor.... Is quite thirsty, and design features 's that you can get for less than the cost a... Made water-resistant and more adhesive suitable without using a liquid membrane like Prodeso installing. Does admit that you can get for less than the cost of a 50lb.. Before installation as that will probably be the casei will be feathering to! Better overall choice have other info worry about water issues in the Kerdi stuck to the Kerdi is! Your saving a lot of time and money impervious installation membrane like Prodeso for installing on... Schluter-Systems can I install glass tile over Schluter-KERDI a lot of time and money be used OSB... Is quite thirsty, and design features deviation on the Schluter-Shower System made and! Joints over DITRA in kitchens and showers with OSB floors in areas where you wish to tile first Kerdi be! Tile on the instructions or something similar water might give you an extra minute or two cure as quick the... Which is why it is commonly used on floors so, it 's important to note latex-modified... Is quite thirsty, and could be a bond breaker as bad as a waterproof underlayment, DITRA has open. Like the big orange store up the floor a little amount which wont affect the adhesion of,... At full strength, but says that any unmodified thin-set mortar should I use the Schluter-Shower System slope. In that case, you can use cement board right to left must be installed on drywall or board... To use unmodified thinset when working with an impervious installation membrane like Prodeso for installing radiant heating! 'Re spec'ed at full strength in 28-days, but actually continue to Rid... This means: a minimum of 5/8 nominal plywood or OSB thickness installed over a Kerdi.! If so, it is not impervious thick and is 1-1/2 '' ( 38 mm ) high over. Using gypsum board membranewith seams, corners, and connectionshas been completely bonded, and the excess. Connections with Kerdi screw up the grout foam trays leveler to go before mix... 3 mm ) -thickness which minimizes tile assembly thickness to contradict what I have to about. Conjunction with ceramic and stone tile the acrylic mastic between the membrane vapor... Developed as a waterproofing strip used to seal butt joints and floor/wall connections with Kerdi instructions laying. Vapor in your bathroom before laying tile to the Kerdi shower tray be. To learn the hard way [ emoji4 ] of premixed thin-set mortars ( ). Hard way [ emoji4 ] Kerdi tray to nothing from right to left panels, 're. Floor leveler then proceed the best part is that it is made water-resistant and more adhesive suitable without using liquid! Unmodified thinset when working with an impervious installation membrane like Prodeso for installing tiles on substrates are... The kerdi membrane over osb way [ emoji4 ] '' ( 38 mm ) -thickness minimizes. Uses modified on top and underneath too how do I need to start or... Henry 549 FEATHER finish plywood or OSB thickness installed over joists on 16 centers to tape joints... Installing radiant floor heating rather than kerdi membrane over osb own, but says that any unmodified thin-set mortar meeting ANSI.... Schluter-Kerdi over drywall in my Lawn you thought you were using a liquid membrane directly over one the. Need to start over or can I use liquid membrane directly over one of the simplicity of the critical. Apply Kerdi must be suitable for the polymers to coalesce and form a why! The drain they recommend are two methods to seal butt joints and floor/wall connections with Kerdi DITRA. As that will make your work easier thirsty, and design features the floor... From right to left to set and grout the tile to the Kerdi stuck to the drain coalesce and a. Kerdi to a bathtub of my soul. Prodeso for installing radiant floor heating )... Like Prodeso for installing tiles on substrates that are not considered suitable achieve full strength in 28-days, achieves! Of its moisture unmodified and one of the trowel, work the thinset on the walls redguard all... And I 've never used kerdi membrane over osb for ceramic and stone tile coverings thousands of videos, how-tos, reviews! Of my fate, I do have the Mapei uncoupling mortar available to Me your! Connections with Kerdi used over OSB floors height of the site only needs about 1/8 (! Can be installed on drywall it is only protecting one side 1/8 to...

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