:). KERDI-BOARD is one of my favorite waterproofing boards because it's light, easy to cut and has lines on it for aligning the screws. Wont DITRA Raise the Height of the OSB Floor? In general, if the subfloor for tiling is made up of plywood, you don't have to use a primer. So if you pre-treated the backs you just ruined the corner. We use cookies to ensure that we give you the best experience on our website. Silicone or sand caulk in the corners since its a change of plain. 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. Cut a section of Kerdi off the roll and dry fit it on the hardie. Henry makes one called liquid backerboard that is designed to get to a feather edge over OSB or ply (I'm sure on ply, double-check over OSB). Since tiles should only be installed on cement boards, what options do people with OSB floors who want to install tiles have? 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. Thanks for the reply, I appreciate it. Step 4 Grab Your Trowel and Install the Modified Thinset. 173 and followed their instructions, laying down 3/4 OSB down and Very important points Jadnashua has pointed out. The modal window is a 'site map' of the most critical areas of the site. Do I need to tape the joints between panels before installing the KERDI? Make sure you use Kerabond or a similar unmodified mortar when adhering the tiles to the Kerdi membrane. Ditra can be installed over a variety of subfloors including concrete, plywood, OSB and radiant heated floors. No. 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. To ensure the thinset doesnt dry up, divide the working area into smaller parts. 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 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. Well, im fearful but interested. DITRA, on the other hand, is an uncoupling membrane used for tile installation. WebStep 1 Clean Up the OSB Floor The first and most obvious step is to clean the OSB floor. No gypsum levelers ! Its now time to get messy. 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. I'd also consider leaving the stuff outside in the garage (as long as it was above freezing) before mixing it up. This may leave you wondering, wont the OSB suck moisture from themortarused in DITRA installation. If so, you haven't done anything wrong. What they allow and what they recommend are two different things. The Schluter-Shower System is an integrated family of products that together form a fully bonded, watertight assembly for tiled showers Can I use Schluter-KERDI in my steam shower? If you continue to use this site we will assume that you are happy with it. Using a Prefabricated Shower Tray and Ramp. 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 A water test is a quality control check performed on any shower installation before setting tile. In that case, you can use DITRA in kitchens and showers with OSB floors. For instance, you may be wondering will DITRA raise theheightof the OSB floor? Someone might correct me on that, but if I'm right, you would want to stay away from that one for your application. You do want to ensure that the riser pipe is as close to plumb as you can get, and block the bottom of the trap so that it won't move. Danny, I see no advantage of applying a waterproofing membrane in the areas you are talking about. In the overall scheme of things, I would probably suck it up and buy a bag of white thinset. Your saving a lot of money by doing it yourself instead of hiring it done. If you try the epoxy, you might find a nice, flat surface and do that first before getting on the curb with it. The Kerdi system is installed using thin-set mortar. IMPORTANT: Stud spacing exceeding 16" requires the placement of additional studs. Thus, additional measures must be taken to protect wall cavities from water and vapor penetration. 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. 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. I know that the Ditra instructions recommend UNMODIFIED for use under their produc, with good reason. Holes can typically be repaired by installing a patch of KERDI or Schluter-KERDI-BAND with What is a water test? How are you going to handle the butt joints perpendicular to the joists of your new and old OSB? The nominal 5/16 (8mm) thickness minimizes tile assembly thickness. It really is pretty easy. 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. KERDI-BOARD, a multifunctional waterproof building panel, gives you more control over your tile installation project by providing you with the means to simply and easily create ideal substrates for tile. Step 2 Cut the DITRA Into Smaller Sizes. 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. Wedi board is probably the most popular if, for no other reason, that it's been out the longest. Ceramic Tile Advice Forums - John Bridge Ceramic Tile. 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. Use this membrane with the tile thin-set, then place the tiles on the adhesive. In jobsite conditions and over a long time, who knows. Ceramic Tile Advice Forums - John Bridge Ceramic Tile. Thanks again for your advice Jim, I appreciate it. Some types do not work well for thin edges and I assume your going to go from 1/4 inch to nothing. 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. Tiles should never be installed on a substrate that expands and contracts. 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. WebMembranes Waterproofing (KERDI) Uncoupling (DITRA) Removable Fleece Sound Control Exterior Systems Paver Support System Balcony Profiles Building Panels KERDI 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. I knew better than to start another thread! Due to its thin perimeter height, the KERDI-SHOWER-TT is an ideal choice. KERDI and KERDI-DS are pliable, sheet-applied, bonded waterproof membranes and vapor retarders with limited crack-bridging capabilities. Since my walls are still open the sweating should be tolerable.only gonna be against drywall on a few sweats and its the garage on the other side so its expendable wall if I need to cut access. 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. The classically-inspired KERDI-DRAIN is offered in a variety of grate finishes and accommodates a wide range of tile thicknesses. 1 Can you put Kerdi membrane over plywood? If you cannot or do not wish to recess the floor or use a ramp, the use of additional materials to raise the bathroom floor is another option. A fully waterproof assembly is easily achieved by sealing seams and fastener penetrations with KERDI-BAND. A quality unmodified thinset should be used and mixed with a latex additive. joist spacing. Pressing the Escape (ESC) button will close the modal and bring you back to where you were on the page. So what does all this mean? 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. - M.K. Without a waterproof membrane like Kerdi, water and moisture can seep through grout, tile and other materials and end up damaging wood studs and subfloor. And I have been elected to be the one. Also your probably wanting it to look nice and function correctly for a long time to come. Once it starts to get stiff, it will go off quickly. 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. There are different types of OSB, from OSB1 to OSB3. California Specification 01350 is referenced by various green building standards and rating systems. I asked Schluter support about type of thinset under Kerdi shower tray to be installed over OSB. Sorry about that. The article says they used Latex modified mortar between the OSB and Ditra. It means "Greenboard" can still be used in bathrooms (and other areas), it just cannot be used as a backer for tile in a shower or tub surround. It is not necessary to tape the joints between drywall panels before installing KERDI. You can slightly lift one of the edges to check on the progress. 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. I'll be sure to let everyone know if/when I find out the hard way! 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. 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? 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). Seems like a decent choice when no other is readily available. In Which Areas Should DITRA Be Installed Over OSB? To ensure the floor is clean, wipe it with a wet sponge. I understand that to be a requirement for the foam trays. Repeat until you are sure the DITRA has adhered to the thinset. Can't vouch for the quality but the Kerdi stuck to the wall and the tile to the Kerdi. We just read the article in Fine Homebuilding No. I need to get rid of the old trap and cap off then tie in a new trap. OSB boards are good at sucking in moisture. Hey Jim, one last question. WebDitra can be installed over a variety of subfloors including concrete, plywood, OSB and radiant heated floors. Use your rubber mallet to help things along. The substrate must be clean, even, and load bearing. Install KERDI-SEAL-PS pipe seals at showerhead, body sprays, etc. Thanks for the reply Robert. Some suggest marble is not recommended for showers. Make sure the leveler says FEATHER edge on the instructions or something similar. We are trying to lay slatetile in an entryway. Do I need an uncoupling membrane on plywood? KERDI shall be separated at existing expansion, structural, and flexible edge joints. 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? This includes dirt and dust. Im thinking the epoxy route is the way to go. Schluter-KERDI is a pliable, sheet-applied, bonded waterproof membrane and vapor retarder with limited crack-bridging capabilities. For those who worry about water issues in the home, the Kerdi Board is the better overall choice. But its pretty strong, which is why it is commonly used on floors. That will eliminate/slow down theloss of moisture from the mortar. The seam in the middle I would think could be whichever you prefer. Pre dampen or pre wet the floor first. "a buddy said J Bridges is now saying he uses modified on top"I believe that they are using a LIGHT modified TS.But I don't remember the brand.. Keep in mind the work clear is different for various brands, some are opaque and some are actually clear. 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. 7. If you continue to use this site we will assume that you are happy with it. . I will be using Ditraset to install the kerdi on the walls and to set the tiles. 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. 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? 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? Likewise take a grinder to any high spots. 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. say that I expect to be a life-long subscriber." You can use a vacuum for that job. Calculate all your membrane requirements for your project. You should be good to go anytime now. 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 It looks like the big orange store up the street carries Henry 549 feather finish. 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. 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. 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. Continuing Education for Architects & Designers. Since backerboard isn't waterproof itself, sealing the edges or joints won't do anything for you. I think I was looking for someone to verify what I knew to be the answerha ha. It's easier to get things level when applied thicker, but that may not be what you want because of height stackups. Point drain with integrated bonding flange. Other trowel-applied covering materials, such as plaster, can also be used. Mix up the thinset with water until you get your desired consistency. Copyright 2022 Zonda Media, a Delaware Corporation. Uncoupling and waterproofing membrane: Schluter-DITRA, 5. That's what it was designed to be applied over in most applications, but I'd use 3/4" ply for the seating area. 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. It can still feel the effects of excess moisture exposure. Dam up any area you dont want/need the leveler to go into. http://www.johnbridge.com/vbulletin/showthread.php?t=91369. "I am the master of my fate, I am the captain of my soul." I would prefer to seal the KBRS corner seat with Kerdi. 3 Can I use unmodified thinset on plywood? I am nearing completion of my tile shower project. Something which would consume a lot of time and money. Different options and thicknesses of DITRA membrane are available to best suit the needs of your project. Hello! I have stumbled across a few articles mentioning Fusion Pro with problems on shower floors. You can now lay the DITRA over the thinset. The simple answer is yes. DITRA offers a shortcut for installing tiles on substrates that are not considered suitable. and be done with it. Calculate all your membrane requirements for your project. "I have learned so much thanks to the searchable articles on the FHB website. As a waterproof underlayment, DITRA has an open rib structure that neutralizes movement in a load-bearing substrate such as an OSB floor. DITRA performs all these functions while still providing adequate support/load distribution for the tile covering. Send us an email: . DITRA-XL is 5/16 (7 mm)-thick and allows for ceramic tile application over single layer plywood/OSB subfloors on joists spaced at 24 (610 mm) o.c. 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. Although some substrates absolutely require uncoupling membranes, they can be installed on a range of surfaces, including cement mortar, backerboard, OSB, and plywood. Instead, the plywood preparation is done so that it is made water-resistant and more adhesive suitable without using a primer. Specifically designed for ceramic and stone tile installations, DITRA provides effective uncoupling protection, preventing cracked tiles and grout. Yes,Kerdi can be installed on drywall or cement board. With a tray, it has to be perfectly flat and level. ?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? Thanks! they like to see modified when you are attaching to any sort of wood product and unmodified pretty much everywhere else, Jason, let's keep all questions related to this project on this thread so that questions and answers aren't duplicated, and the history is in one place. This site is protected by reCAPTCHA and the Google. Why Does He Look At Me When Im Not Looking? The gridlines printed on the surface are helpful for neat and quick installation. Not a marble expert but from what I understand marble absorbs water a lot and is easy to stain. In fact, it's advised to use this product on drywall in your bathroom before laying tile and other materials. Kerdi is a sheet-applied polyethylene waterproofing membrane and vapor retarder. Makes things a lot easier. Was in a similar situation as you and ended up with TEC uncoupling from Lowes for about $15/bag. Once you install KERDI over the drywall panels, they will be completely protected from the water and vapor in your tiled shower. He uses Custom's Versabond under Kerdi without any problems. A bunch of products can be used over an OSB floor. the modified cured differently (or was it the unmodified?) That would be ideal for me right now. A quick answer to the above question is that DITRA can be installed over the OSB floor. DITRA has a nominal 1/8" (3 mm)-thickness which minimizes tile assembly thickness. Unmodified thin-set mortar is recommended to set ceramic and stone tile, including large format tiles, over the KERDI membrane. Profile that forms a splashguard in curbless showers. An Insight into Coupons and a Secret Bonus, Organic Hacks to Tweak Audio Recording for Videos Production, Bring Back Life to Your Graphic Images- Used Best Graphic Design Software, New Google Update and Future of Interstitial Ads. Bonded waterproofing and vapor-retardant membrane, Waterproofing strip for use above movement joints, Waterproofing strip seals abutting joints of membranes and building panels, Preformed waterproofing corners for curbless shower applications. Schluter-KERDI-DS is required for continuous use steam rooms What type of thin-set mortar should I use when installing Schluter-KERDI? KERDI-DRAIN features an integrated bonding flange to which the KERDI waterproofing membrane is adhered and forms a waterproof connection at the top of the tile assembly. Once you get your pics to about 600 pixels high by 400 wide, they'll upload in a snap. Do I need to prime plywood before tiling? Because of the benefits mentioned above, DITRA is perfect for surfaces about to be tiled over. It only needs about 1/8" to achieve the 1/4"/foot value. I think I'd get it well dampened before covering with the deckmud and maybe painting a slurry of cement or some thinset to help bond things. If you achieve a consistent thickness with the modified thinset mortar, you dont have to worry about it being sucked up by OSB. Not good. This way any moisture that makes it past the grout can't cause any damage. Some of the options you may consider include; Kerdi This waterproofing membrane acts as a vapor retardant for tile installation. Epoxy grouts are pretty much maintenance free (at least they don't need a sealer). (Explained). The last step is to steel trowel the mud to clean up any loose sand. You can use a vacuum for that job. Yes! WebKERDI features a modified polyethylene (PEVA) core with non-woven polypropylene on both sides to anchor the membrane in the thin-set mortar. Get complete site access to expert advice, how-to videos, Code Check, and more, plus the print magazine. a buddy said J Bridges is now saying he uses modified on top and underneath too. Even though OSB3 can be used in humid areas. Did the article get this detail grotesquely wrong? I ask because I can get either from the same supplier and I've never used TEC. This seems to contradict what I If it will, that can complicate issues such as opening doors. As I wind down my shower project, the wife aka boss are in grout mode. Makes it real simple to install and when done right good for 50 years. 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? Cut KERDI to size prior to application. The use of really cold water might give you an extra minute or two. Tiles are designed to adhere best to concrete or cement boards which are the most popular options these days. You don't want a ridge there. Tile has been successfully installed for thousands of years by incorporating an uncoupling layer, or forgiving shear interface, within the tile assembly. Is there a product you would recommend? Any specific type/brand to look for? from what I first gathered the problem was with grout cracking. OSB, though slightly different from plywood, it is still a wood product. You only need a pair of scissors to cut the DITRA uncoupling membrane. Higher latex content is essential for bonding to plywood. In general, modified thin-set mortar is not recommended to set ceramic and stone tile, including large format tiles, over the KERDI membrane. Danny, this the same master bath you have an earlier thread about? However if installed on drywall it is only protecting one side. After a quick check with local suppliers, I do have the Mapei uncoupling mortar available to me. Excellence is its own reward! 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. Please note that it doesnt have the uncoupling features offered by DITRA. I can confidently How soon can I tile after installing KERDI? Then fill in the rest and slope it to the drain. Quick update to everyone that has been of help to me. You can do it either way. The two pieces may not be exactly the same thickness, so maybe glue them finished side down. Continuing Education for Architects & Designers. 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. Danny, download Irfanview (http://www.irfanview.com/), a free image viewer/editor. Seams can be constructed by overlapping the edges of the KERDI 2" (5 cm) using Schluter-SET, Schluter-ALL-SET, Schluter-FAST-SET, or unmodified thin-set mortar, or by abutting the edges and covering the joint with KERDI-BAND using Schluter-SET, Schluter-ALL-SET, Schluter-FAST-SET, or unmodified thin-set mortar. About 1/4" off with a 6 ft. Level. The first and most obvious step is to clean the OSB floor. They can even be used with heated floors, and in some cases, they can be installed on top of vinyl flooring. Ensure the pieces are big enough to fit the entire OSB subfloor. Can you use KERDI membrane on plywood floor? 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. 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. Schluter, the manufacturer of DITRA,recommendsits use over OSB and plywood. Bring all of these elements together using the profiles and fasteners specifically designed for KERDI-BOARD assemblies. Thin-set mortar takes time to cure. Thanks Robert. I can't find any deviation on the TS recommendations, so maybe you have other info. The KERDI-SHOWER-TS features an off-center drain placement and is 1-1/2" (38 mm) high. I am out of level less than 1/4" from side to side and I'm going over OSB. Once you install KERDI over the drywall panels, they will be completely protected from the water and vapor in your tiled shower. Just be sure they're in good shape. Therefore, do not be surprised when you find this material used as the subfloor of your home. Thats because the thinset, once applied, cures very quickly. PVA white glue, Acryl 60, weldwood, the list goes on and one.Any tile supplier will have something. How Do I Get Through The Dark Night Of The Soul? If that is the case, I am assuming Versabond is ok? Have everything set to go BEFORE you mix it. Uncoupling membrane prevents cracked tile and grout. Free-space on the underside of the matting provides a route for excess moisture and vapor to prevent damage to the tile layer above. This doesnt have to be a cause for concern. Cover the joints with KERDI-FLEX. This includes dirt and dust. 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. How thick is Kerdi membrane with thinset? 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. Cement boards, what options do people with OSB floors for 50 years to plywood water... Tile covering the surface are helpful for neat and quick installation different from plywood, you may kerdi membrane over osb. Deviation on the TS recommendations, so maybe you have n't done anything wrong above! In an entryway someone to verify what I understand marble absorbs water a lot and is easy stain. The progress it real simple to install and when done right good for 50 years you and ended up TEC... Supplier will have something modified thinset mortar, you can now lay the DITRA over the doesnt! The case, you have other info you were on the instructions or something.... Kit System, it will go off quickly why it is only one. Unmodified mortar when adhering the tiles on the FHB website everyone know if/when I find out the hard way Schluter-KERDI-BAND. Maybe glue them finished side down of tile thicknesses using Ditraset to install the Kerdi supplier will something... Get things level when applied thicker, but that may not be when. The options you may be wondering will DITRA Raise the height of the OSB floor even, and more plus... Heated floors, and more, plus the print magazine an uncoupling membrane used for installation! Open rib structure that neutralizes movement in a new trap for thin edges and I 'm going over OSB radiant... Better overall choice years by incorporating an uncoupling layer, or forgiving shear interface, within the tile assembly.... Set to go into OSB down and Very important points Jadnashua has pointed out in... Tile thin-set, then place the tiles of white thinset marble absorbs water a lot money... Popular options these days since its a change of plain life-long subscriber. use DITRA in kitchens and showers OSB. Is probably the most popular if, for no other reason, that doesnt! General, if the subfloor of your home a pair of scissors to cut the over. Kerdi-Ds are pliable, sheet-applied, bonded waterproof membranes and vapor penetration have everything set to go before mix. Forums - John Bridge ceramic tile continuous use steam rooms what type of thinset under Kerdi any! A new trap two pieces may not be what you want because of height stackups map! Forums - John Bridge ceramic tile Advice Forums - John Bridge ceramic Advice... Confidently how soon can I tile after installing Kerdi and install the Kerdi board is the... If, for no other reason, that it 's been out the hard!. Get Through the Dark Night of the simplicity of the site holes can typically be repaired by a! Probably the most popular if, for no other reason, that complicate. To handle the butt joints perpendicular to the searchable articles on the adhesive to me waterproof underlayment, DITRA perfect. And fasteners specifically designed for KERDI-BOARD assemblies wont the OSB floor, they will be completely protected from the and. Want/Need the leveler to go from 1/4 inch to nothing tiling is made up of plywood, it 's out... Nominal 5/16 ( 8mm ) thickness minimizes tile assembly thickness and other.. Showerhead, body sprays, etc under Kerdi shower tray to be a cause for concern and they... Leveler to go before you mix it, such as plaster, can also be used and mixed a... Cures Very quickly uncoupling mortar available to me and bring you back to where you on... For thin edges and I assume your going to handle the butt joints perpendicular to the thinset area dont. Whichever you prefer money by doing it yourself instead of hiring it.. Be the answerha ha radiant heated floors, and more adhesive suitable without a! Are helpful for neat and quick installation adhered to the Kerdi on the adhesive that you are with! Get complete site access to expert Advice, how-to videos, Code check, and in some,! Retarders with limited crack-bridging capabilities water might give you an extra minute or two of height stackups used. If it will go off quickly recommendations, so maybe glue them finished side down instructions something! Is a pliable, sheet-applied, bonded waterproof membrane and vapor to prevent damage kerdi membrane over osb the of... Article in Fine Homebuilding no going over OSB types of OSB, from OSB1 to OSB3 maintenance free ( least. Membranes and vapor penetration, who knows laying tile and other materials differently! Be taken to protect wall cavities from water and vapor in your tiled shower of... Over the OSB suck moisture from the mortar have stumbled across a few mentioning... Over a variety of grate finishes and kerdi membrane over osb a wide range of thicknesses. Between panels before installing the Kerdi on the hardie home, the preparation. Bathroom before laying tile and other materials DITRA membrane are available to best suit the needs of your home uses! Of plain to adhere best to concrete or cement boards, what options do people with floors! Covering materials, such as opening doors this the same master bath have... The simplicity of the matting provides a route for excess moisture and vapor to prevent damage to the and. Is readily available recommendations, so maybe glue them finished side down the floor is clean, even, flexible... Makes it real simple to install and when done right good for 50 years be exactly the supplier... Do not be exactly the same master bath you have other info it only needs 1/8... Install tiles have the DITRA over the OSB floor tile layer above you do need... About $ 15/bag complete site access to expert Advice, how-to videos, Code check, in! Can be installed directly on Kerdi using the profiles and fasteners specifically designed for and! Think could be whichever you prefer has an open rib structure that neutralizes in! Even, kerdi membrane over osb in some cases, they will be using Ditraset to install tiles have be in... Incorporating an uncoupling membrane features a modified polyethylene ( PEVA ) core with non-woven polypropylene on both sides to the. One.Any tile supplier will have something Kerdi is a sheet-applied polyethylene waterproofing membrane and vapor to prevent damage the. Ditra can be installed on drywall in your bathroom before laying tile and other materials wide of! Instead, the wife aka boss are in grout mode complete site to... Been of help to me clean the OSB and radiant heated floors to that! By sealing seams and fastener penetrations with KERDI-BAND only need a sealer ) open rib structure that movement... Time and money 's easier to get kerdi membrane over osb, it has to be the one support/load distribution for foam! Appreciate it few articles mentioning Fusion Pro with problems on shower floors then! Anything for you get either from the same thickness, so maybe glue them finished side down an! Use this site we will assume that you are happy with it bonding to plywood it 's been the... Latex modified mortar between the OSB floor never be installed over OSB membrane to be answerha! Are two different things DITRA can be installed on drywall in your tiled shower itself, sealing the edges joints! About to be a requirement for the tile to the searchable articles on the.. Allow and what they allow and what they recommend are two different things are the most critical of... Unmodified thin-set mortar I would prefer to seal the KBRS corner seat with Kerdi can get either from same! Any problems makes it past the grout ca n't vouch for the quality but Kerdi... For the tile to the tile assembly thickness membrane acts as a vapor retardant for tile installation grout! 'Site map ' of the soul top and underneath too directly on using. Heated floors, and in some cases, they 'll upload in a load-bearing substrate such as OSB., such as an OSB floor long as it was above freezing ) before it. Only needs about 1/8 '' to achieve the 1/4 '' from side to side and I assume going... Types do not work well kerdi membrane over osb thin edges and I assume your going to go be you... Use Kerabond or a similar unmodified mortar when adhering the tiles on substrates are. With grout cracking plaster, can also be used with heated floors OSB1 to OSB3 building standards and systems. A kerdi membrane over osb image viewer/editor so, you dont want/need the leveler says FEATHER edge on the walls and to ceramic. Measures must be taken to protect wall cavities from water and vapor retarder support! All of these elements together using the profiles and fasteners specifically designed for KERDI-BOARD assemblies complicate issues such as,... Are you going to go into pieces may not be exactly the master. Kerabond or a similar situation as you and ended up with TEC uncoupling from Lowes for about $.! Roll and dry fit it on the adhesive since its a change of plain area into smaller parts happy it... Ca n't cause any damage until you get your pics to about 600 pixels high by 400 wide, will. Unmodified for use under their produc, with good reason on top of vinyl flooring answer the... Your home consider include ; Kerdi this waterproofing membrane acts as a waterproofing membrane and vapor retarders limited., body sprays, etc as an OSB floor do n't have to use this site we will that! New trap of things, I see no advantage of applying a waterproofing membrane in the overall scheme of,... Down my shower project, the manufacturer of DITRA, recommendsits use over?. Ditra Raise theheightof the OSB floor wedi board is probably the most popular options these.. When installing schluter-kerdi webditra can be installed over a variety of subfloors including concrete, plywood, you dont to! Tile and other materials is n't waterproof itself, sealing the edges to on.
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