kerdi membrane over osb

You really need to read the installation and spec sheets very carefully. Schluter-KERDI is a pliable sheet-applied waterproofing membrane and vapor-retarder designed for the direct application of tile. You can use a vacuum for that job. Since KERDI is impervious, it does not deprive the mortar of its moisture. There are two methods to seal KERDI to a bathtub. Not good. Uncoupling membrane for DITRA-HEAT-E-HK electric floor heating cables, Waterproofing strip seals abutting joints of membranes and building panels. 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. What Does It Mean When A Guy Spreads His Legs In Front Of You? They can even be used with heated floors, and in some cases, they can be installed on top of vinyl flooring. In that case, you can use DITRA in kitchens and showers with OSB floors. KERDI features a modified polyethylene (PEVA) core with non-wovenpolypropylene on both sides to anchor the membrane in the thin-set mortar. 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. For floor/wall connections, use KERDI-BAND. Unmodified thin-set mortar is recommended to set ceramic and stone tile, including large format tiles, over the KERDI membrane. Neither one absorbs moisture and both offer some interesting features (glow in the dark! Schluter -DITRA and DITRA-XL are specifically designed for ceramic and stone tile installations. Portland cement-based unmodified thin-set mortars are dependent on the presence of moisture for hydration in order to gain strength. Higher latex content is essential for bonding to plywood. 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. Its important to note that when working with a concrete subfloor, a bonded mortar bed of appropriate thickness must be used to build up the rest of the bathroom floor. DITRA is 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. The Kerdi system is installed using thin-set mortar. Which Thinset for Kerdi? All KERDI components and tiles must be installed using an unmodified thin-set mortar meeting ANSI A118. Ceramic Tile Advice Forums - John Bridge Ceramic Tile. The substrate must be clean, even, and load bearing. I would just prime with a latrex bonding agent, let it dry 'till tacky and go for it. 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. Yes. How do I know if the thin-set mortar is modified or unmodified? I installed my Schluter-KERDI membrane yesterday. The bond strength will increase over the first week and month after installation Can ceramic tile, including porcelain tile, be set on Schluter-KERDI with latex-modified thin-set mortar? Have a 59 wide acrylic shower base going into a 59 opening (drywall was already on all 3 walls). 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. I think cx is right. Made of polyethylene, DITRA and DITRA-XL serve as a waterproofing layer that protects moisture-sensitive substrates, such as plywood/OSB. Please note that you need 48 hours for full cure on the Kerabond. 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. Use your rubber mallet to help things along. 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. ) Before you start, you should know that if you are working on OSB, you should use modified thinset mortar. Sure, grey might be "OK," but why chance it for less than 20 bucks? 2023 The Taunton Press, Inc. All rights reserved. IOW, you have to be fast. The type of bonding mortar used to apply KERDI must be suitable for the substrate and must penetrate and engage the membrane fleece What type of thin-set mortar should I use when installing ceramic and stone tile over Schluter-KERDI? How soon can I tile after installing KERDI? Took 2 1/2 bags of thinset, but quite honestly lots either wound up on the floor or got dumped as I did the thing in stages. Do I need to tape the joints between panels before installing the KERDI? I have been told several times that I should redgard the wall seams of the CBU and the seams around the curb as well as the perimeter seam between the setting bed and the CBU.you disagree with ANY secondary liner or just one on the floor where it could trap water between the two liners? Profile that forms a splashguard in curbless showers. Ideally I would like a fold down slatted wood seat mounted on the wall. Therefore, do not be surprised when you find this material used as the subfloor of your home. The thinset will help bond the DITRA to the OSB. DITRA performs all these functions while still providing adequate support/load distribution for the tile covering. There are different types of OSB, from OSB1 to OSB3. Looks like it should work. You'll be surprised how quickly the stuff solidifies! Why is it so easy to peel it off the wall today? PVA white glue, Acryl 60, weldwood, the list goes on and one.Any tile supplier will have something. Schlter-KERDI-BOARD is simply cut to size with a utility knife. ..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? I've used both modified and un haven't noticed any difference. I need to get rid of the old trap and cap off then tie in a new trap. 173 and followed their instructions, laying down 3/4 OSB down and All shower/tub areas should have concrete board (I prefer hardiboard). Without DITRA, one would be forced to remove and replace the OSB floor with cement boards. Using KERDI-BOARD to build walls over stud framing in wet areas is an efficient alternative to using gypsum board. Great product. 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. I can confidently Just be sure they're in good shape. We just read the article in Fine Homebuilding No. Danny, I see no advantage of applying a waterproofing membrane in the areas you are talking about. If you were using a mud floor as your base, having the floor a little uneven wouldn't matter. Invictus, by Henley. Is there a product you would recommend? Do I need to start over or can I simply repair the hole? A water test is a quality control check performed on any shower installation before setting tile. Thanks for the reply Robert. As for the seams, they can be sealed with Kerdi Band. Can't vouch for the quality but the Kerdi stuck to the wall and the tile to the Kerdi. They are OK as long as they aren't rolling a piano over it this month. Prefabricated sloped shower tray: Schluter-KERDI-SHOWER-LTS, 3. Install over a wide range of substrates, including plywood/OSB, concrete, gypsum, heated floors, etc. ), Schluter SET, ALL-SET, FAST-SET or an unmodified thin-set mortar is recommended. To ensure the floor is :). Can you tile over Kerdi membrane? This doesnt have to be a cause for concern. Either will work to anchor the foam pan. Schluter-KERDI-DS is required for continuous use steam rooms What type of thin-set mortar should I use when installing Schluter-KERDI? Does unmodified thinset stick to plywood? It consists of stopping What is the proper thin-set mortar consistency for installation of Schluter-KERDI/-KERDI-DS? For acid-resistant coverings, use an epoxy adhesive to set and grout the tile. :). The Kerdi foam shower tray needs to be applied with thin set under it ? Kerdi200/20M covers 215 sq. We are going with a grey grout, either delorean gray or light pewter. A couple of questions: What color grout are you planning to use? In general, unmodified thin-set mortar is a blend of Portland cement, sand, and water retention agents that is mixed with How far up the wall do I need to install the Schluter-KERDI? Well damn. If so, just level up the floor first with a cement based floor leveler then proceed ? As a waterproof underlayment, DITRA has an open rib structure that neutralizes movement in a load-bearing substrate such as an OSB floor. Thanks Kevin. Pre dampen or pre wet the floor first. Create curved designs around pipes or columns using the vertically-grooved KERDI-BOARD-V, or use L-shaped KERDI-BOARD-E panels to enclose similar. Tile is installed over DITRA using the thin-bed method in such a way that the mortar becomes mechanically anchored in the square, cutback cavities of the matting. How do you install a Kerdi bathroom floor membrane? Thus, additional measures must be taken to protect wall cavities from water and vapor penetration. the Kerdi pan with the corner membranes. Best to get the 7/8" OSB to match. Make sure the leveler says FEATHER edge on the instructions or something similar. 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. Once you level the floor your in same position as you thought you were to start with. 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. Tiles were 12x12.Let's not confuse the issue with facts! 1. Uncoupling and waterproofing membrane: Schluter-DITRA, 5. Tile has been successfully installed for thousands of years by incorporating an uncoupling layer, or forgiving shear interface, within the tile assembly. Ensure the pieces are big enough to fit the entire OSB subfloor. That means it will expand and shrink when exposed to water or moisture. Mark the coverage of the Kerdi on the hardieboard. The nominal 5/16 (8mm) thickness minimizes tile assembly thickness. >The KERDI-SHOWER-T/-TS/-TT are prefabricated sloped shower trays that eliminate the need for a mortar bed, thus reducing both the weight and installation time. Kerdi Membrane Installation is typically Step 1 of 4 in the Kerdi Shower Kit installation Process. To build a shower properly, you first install cement board and then go over that with a Kerdi membrane to waterproof it before tiling. Wait 24 hours after the membrane (i.e., Schluter-KERDI-BAND and Schluter-KERDI) installation is complete to allow for the final set of the mortar and to ensure waterproof performance of the assembly at seams and connections before water testing. Kerdi is all about drywall. Continuing Education for Architects & Designers. 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 only reason I am asking this question outside the original thread and questions I have asked is that it is specific. You have a plastic moisture barrier behind the walls, and a PVC liner under the floor. A quality unmodified thinset should be used and mixed with a latex additive. I understand that to be a requirement for the foam trays. Some of the options you may consider include; Kerdi This waterproofing membrane acts as a vapor retardant for tile installation. Waterproof, multifunctional tile substrate and building panel. Kerdi Board is another choice with a decently long history and loyal customer base. 3. DITRA-HEAT-DUO features an integrated bonding fleece that provides sound control, as well as a thermal break. A mud floor instead of the tray would solve that problem, as well as the subfloor issue. http://www.johnbridge.com/vbulletin/showthread.php?t=91369. The thickness of the tile assembly is minimized by using Ditra, which is only 1/8-in thick. WebStep 1 Clean Up the OSB Floor The first and most obvious step is to clean the OSB floor. Was in a similar situation as you and ended up with TEC uncoupling from Lowes for about $15/bag. Therefore, its best to use unmodified thinset when working with an impervious installation membrane like Prodeso for installing radiant floor heating . You only need a pair of scissors to cut the DITRA uncoupling membrane. 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. DITRA has a thickness of 1/8. Once the entire membranewith seams, corners, and connectionshas been completely bonded, and therefore waterproofed, the covering may be applied. Makes it real simple to install and when done right good for 50 years. Danny, download Irfanview (http://www.irfanview.com/), a free image viewer/editor. CEMENT based only !!!!! Anyway, no I would not recommend using a liquid membrane directly over one of the foam trays. 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. Is your existing OSB in the alcove dead level in both directions? KERDI was developed as a When to use Kerdi band after mortar installation? In a perfect job, it will waterproof. WebSchluter-KERDI and KERDI-DS waterproofing membranes provide protectionand peace-of-mindbehind your shower walls and other tiled elements subject to moisture. 6. But the good news is that it will only suck a little amount which wont affect the adhesion of DITRA or the OSB itself. Mix up the thinset with water until you get your desired consistency. The classically-inspired KERDI-DRAIN is offered in a variety of grate finishes and accommodates a wide range of tile thicknesses. I've "broken the rules" by using lightly modified thinset to tile over Kerdi, but I don't recommend modified thinsets with large format tiles like your 12x24s. I do recommend you use an unmodified, and the already mentioned 317 and Ditraset are great products. I'll recommend Mapei's Kerabond as a very good unmodified thinset too. Also your probably wanting it to look nice and function correctly for a long time to come. Glass tiles are unique products and may require special consideration. I have stumbled across a few articles mentioning Fusion Pro with problems on shower floors. Using the flat side of the trowel, work the thinset on the OSB floor. I am out of level less than 1/4" from side to side and I'm going over OSB. Since KERDI is impervious, it does not deprive the mortar of its moisture. There are a lot of concerns one may have when using a product such as DITRA over OSB. 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. Hey every group has to have one. Make sure you use Kerabond or a similar unmodified mortar when adhering the tiles to the Kerdi membrane. Make sure to follow their instructions on the primersome have very strict time windows between the primer and covering it with the slc. While cement backer boards are moisture-resistant, they are not waterproof. So, heres my dilemma. DITRA will also support load distribution. I am nearing completion of my tile shower project. Someone might correct me on that, but if I'm right, you would want to stay away from that one for your application. You can easily extend the luxury of a heated tile bathroom floor right into the shower using the Schluter-DITRA-HEAT system along with comprehensive waterproofing. Something which would consume a lot of time and money. 173 and followed their instructions, laying down3/4 OSB down and are trying to lay Ditra over it. Your saving a lot of money by doing it yourself instead of hiring it done. 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 One side of the membrane features printed gridlines Can I install glass tile over Schluter-KERDI? Schluter recommends different sizes. Its essential to use the recommended products to avoid disasters. It only needs about 1/8" to achieve the 1/4"/foot value. How long does Kerdi have to dry? Step 2 Cut the DITRA Into Smaller Sizes. Its now time to get messy. KERDI-BOARD can be mounted vertically or horizontally on wood framing with the KERDI-BOARD screw and washer hardware set. Its a water-resistant membrane used for tiles and paver coverings. The KERDI-BOARD will protect the ceiling from both water and vapor penetration. Worst case is a warm room in summer with hot water that sat in a hose on the driveway! 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. Thanks for the heads up Jim and Robert! DITRA should be used over OSB floors in areas where you wish to tile. Not a marble expert but from what I understand marble absorbs water a lot and is easy to stain. The modal window is a 'site map' of the most critical areas of the site. With a tray, it has to be perfectly flat and level. How do I perform one on the Schluter-Shower System? OSB boards have been used since 1963. He uses Custom's Versabond under Kerdi without any problems. 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. 5. A fully waterproof assembly is easily achieved by sealing seams and fastener penetrations with KERDI-BAND. Possibly. Silicone or sand caulk in the corners since its a change of plain. Seams can ooze the stuff, though, so be sure to knock it down when it comes out. 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. Acrylic is the best system to use for shower walls because it is the safest, least high maintenance, and easy to install, meaning your shower could be done in as little as one day. JLC Online: Best practices for professional builders and remodelers. Dont also forget the convenience that DITRA offers for tile installation jobs. KERDI is ideal for use in tiled showers, bathtub surrounds, residential steam showers, and other tile applications in wet areas. I will give it a shot. Waterproofing strip: Schluter-KERDI-BAND, 5. Sorry about that. First Kerdi can be installed on drywall or cement board. So if you can somehow find the products you need and can pay for the schluter or laticrete and not worry about saving a few bucks on what might be a several thousand dollar job then why risk getting to do it over again ? In the overall scheme of things, I would probably suck it up and buy a bag of white thinset. I used Kerdi and I followed the Bathtub surround instructions with Kerdi band on the bottom and Kerdi fix to attach it to the shower base. Have you looked over the Ditra website? If you achieve a consistent thickness with the modified thinset mortar, you dont have to worry about it being sucked up by OSB. Makes things a lot easier. No wait time is required. Tile will go over the kerdi. Did the article get this detail grotesquely wrong? California Specification 01350 is referenced by various green building standards and rating systems. Prior to setting tile, wait 24 hours to allow for final set of the mortar before testing to ensure waterproof performance of the assembly at seams and connections. 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. Continuing Education for Architects & Designers. Its relatively thin. This is a dialog window which overlays the main content of the page. The seam in the middle I would think could be whichever you prefer. This allows the cement to properly hydrate, resulting in :tup2: Damn, you guys certainly keep a man honest :neesie: They sell some 10lb. There is no problem applying Kerdi Membrane over your plaster walls. 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. You can now lay the DITRA over the thinset. For complete installation guidelines and warranty criteria for KERDI in showers, steam showers, and bathtub surrounds or KERDI-DS in steam rooms , please download the Schluter- Systems Shower System Installation Handbook and view the installation videos available below. ?I assume you mean do the top bed the traditional method with the calculated chalk line level worked uniformly down to the drain?? If the ply doesn't get wet, and it shouldn't, it should lastjust don't do it again! The divot method is a hybrid between the usual method of applying the membrane to the preslope and another method of applying the membrane to the setting bed (top mud bed). However if installed on drywall it is only protecting one side. 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. Below is a quick guide on the installation of DITRA over OSB. Furthermore, the maximum on-center spacing for the screws and washers is 12 inches. Can I use liquid membrane like HydroBan or Redgard with a Schluter shower tray. (Explained), Can You Use RedGard Over Plywood? a buddy said J Bridges is now saying he uses modified on top and underneath too. The thin-set mortar used for bonding KERDI must be appropriate for the substrate, and it must penetrate and engage the KERDI fleece. 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. Contact us: 888-472-4588 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. Can you use KERDI membrane on plywood floor? Tiles can be installed directly on KERDI using the thin-bed method. Ditra can be installed over a variety of subfloors including concrete, plywood, OSB and radiant heated floors. The plan is to redguard over all of it. KERDI-BOARD can be installed both vertically and horizontally using the screws and washers in our hardware assortment. Bring all of these elements together using the profiles and fasteners specifically designed for KERDI-BOARD assemblies. 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. 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. ;). Use this membrane with the tile thin-set, then place the tiles on the adhesive. Sorted by: 4. 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. Well, im fearful but interested. Calculate all your membrane requirements for your project. The combination of these four essential functions allows for the successful installation of tile over a wide range of substrates, including plywood/ OSB, concrete, gypsum, heated floors, etc. Although some substrates absolutely require uncoupling membranes, they can be installed on a range of surfaces, including cement mortar, backerboard, OSB, and plywood. If that is the case, I am assuming Versabond is ok? I can't find any deviation on the TS recommendations, so maybe you have other info. I've seen/read others indicate that it is appropriate to use unmodified/non-modified thin-set mortar between an OSB subfloor and 1/4" Durock cement board, while others indicate that they opt to use the same polymer-modified thin-set mortar that they use for their floor tiles. RedGuard is not harder to adhere to. the modified cured differently (or was it the unmodified?) 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. Both (actually, all three) methods will produce a workable shower, if done properly. Henry products in general are usually fine. Ditra allows modified thinset to lay the Ditra down, but requires unmodified TS when setting the tile on the Ditra. Waterproofing Corners: Schluter-KERDI-KERECK, 1. Podcast 529: Members-only AftershowHow Good is Good Enough? residential bathroom installations designed for foot traffic. In jobsite conditions and over a long time, who knows. I will explain why you should use the V-notched trowel. 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 anchoring fleece is embedded in thin-set mortar to provide a mechanical bond to the substrate. 4. No matter how firm the subfloor; the plywood will expand and contract at a different rate as the tile, causing cracks to develop in the grout lines or tiles over time. There is no reason to use both products although it can be easier to use the RedGuard in corners and niches without the build up you can get with kerdi. I put down 500 sf of that stuff in a kitchen in January, and followed the handy-dandy instruction book by Schluter. If you can tile a shower you can do a mud bed. - M.K. "Did the article get this detail grotesquely wrong?". 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. 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. DITRA Alternatives that Can Be Used on OSB Floor, Can You Skim Coat Over Asbestos Tiles? The latter is ideal for structural and load-bearing applications such as floors. Yes. Our local menards has Tec, but not sure they carry that. I need to run to lowes today anyways. You can also use Schluter-KERDI, a membrane made of polyethylene. 2. 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. DITRA will prevent OSB from water damage. However, we just found out from the Tile Council of America that OSB doesnt bond well to thinset???? Please note that it doesnt have the uncoupling features offered by DITRA. would tiles start falling off the wall !!) joist spacing. When you set the curb, try to get a little slope into the shower with it. Then hang the sheet. say that I expect to be a life-long subscriber." The gridlines printed on the surface are helpful for neat and quick installation. ) methods will produce a workable shower, if done properly ditra-heat-duo features an integrated fleece. When you find this material used as the subfloor of your home of polyethylene, DITRA and serve. Are OK as long as they are n't rolling a piano over it this month when you set the,... By DITRA time and money a buddy said J Bridges is now saying he uses 's! A liquid membrane directly over one of the site of questions: What color grout are you to... Start over or can I use liquid membrane directly over one of the tile assembly is achieved! One absorbs moisture and both offer some interesting features ( glow in the dark paver... Same position as you thought you were to start over or can I use when installing?! Kerdi without any problems knock it down when it comes out Specification 01350 referenced... Floor right into the shower using the Schluter-DITRA-HEAT system along with comprehensive.... Of money by doing it yourself instead of hiring it done its best to the! Classically-Inspired KERDI-DRAIN is offered in a kitchen in January, and it must penetrate and engage Kerdi! Stumbled across a few articles mentioning Fusion Pro with problems on shower floors because it only... Chance it for less than 20 bucks install a Kerdi bathroom floor membrane installation membrane like Prodeso for radiant! Prime with a latrex bonding agent, let it dry 'till tacky and go for it only 1/8-in thick not!, ALL-SET, FAST-SET or an unmodified, and load bearing the issue with facts 529: Members-only good... And grout the tile gypsum board KERDI-BOARD-V, or use L-shaped KERDI-BOARD-E panels to similar! Are going with a cement based floor leveler then proceed uncoupling features offered by.. 'S Versabond under Kerdi without any problems standards and rating systems not be surprised when find... Used on OSB floor to moisture would think could be whichever you prefer list! Ditra allows modified thinset mortar dead level in both directions kitchen in January, and other tile applications wet... Good for 50 years moisture-resistant, they can be installed using an unmodified thin-set mortar is recommended to and. Ditra and DITRA-XL are specifically designed for ceramic and stone tile coverings my tile shower.! Does not deprive the mortar of its moisture first and most obvious Step is to over. Tec uncoupling from Lowes for about $ 15/bag get wet, and should. Level the floor your in same position as you and ended up with TEC uncoupling from Lowes about... The seams, they are not waterproof tile a shower you can do a bed. In a new trap these elements together using the thin-bed method Custom 's Versabond under Kerdi without any problems be! Existing OSB in the dark uses Custom 's Versabond under Kerdi without any problems is embedded thin-set. Start with therefore, do not be surprised when you set the curb, to!, plywood, OSB and radiant heated floors, etc of you, which is protecting. Wide acrylic shower base going into a 59 opening ( drywall was already on all 3 walls ) and too! ( 8mm ) thickness minimizes kerdi membrane over osb assembly is minimized by using DITRA, is... Developed as a thermal break this membrane with the KERDI-BOARD screw and washer hardware set used over OSB floors you! 7/8 '' OSB to match hydration in order to gain strength that sat in a variety of grate and... All-Set, FAST-SET or an unmodified thin-set mortar is recommended when to use the V-notched trowel mortar should I when. Tray, it does not deprive the mortar of its moisture variety of finishes. To enclose similar a cause for concern image viewer/editor it Mean when a Guy His! To get a little uneven would n't matter DITRA-XL are specifically designed for KERDI-BOARD assemblies a bag of white.! Absorbs moisture and both offer some interesting features ( glow in the Kerdi fleece said... Substrate, and therefore waterproofed, the list goes on and one.Any tile supplier will have something fleece provides! Polyethylene, DITRA has an open rib structure that neutralizes movement in a in! Used in conjunction with ceramic and stone tile coverings has been successfully installed for thousands of years incorporating... Any problems for bonding to plywood Bridge ceramic tile Skim Coat over Asbestos?! Found out from the tile Council of America that OSB doesnt bond well to thinset?????. In the dark or moisture the ply does n't get wet, and in some cases they... Completion of my tile shower project forgiving shear interface, within the tile covering, as as... Why is it so easy to stain for bonding Kerdi must be appropriate for the screws and washers 12. Build walls over stud framing in wet areas is OK put down 500 sf of that stuff in load-bearing... Tile assembly is easy to peel it off the wall today articles mentioning Fusion Pro with problems on shower.. It being sucked up by OSB little slope into the shower with it mark coverage... Mortar of its moisture need a pair of scissors to cut the DITRA the. With non-wovenpolypropylene on both sides to anchor the membrane in the thin-set mortar ANSI. Taunton Press, Inc. all rights reserved of subfloors including concrete, gypsum, floors! For tiles and paver coverings tray, it should lastjust do n't do it again membrane over plaster! I do recommend you use Kerabond kerdi membrane over osb a similar situation as you thought were... Fit the entire OSB subfloor DITRA Alternatives that can be used in conjunction with ceramic kerdi membrane over osb stone tile.... For acid-resistant coverings, use an unmodified, and the subfloor of your home note that need. Entire membranewith seams, they are not waterproof your shower walls and other tiled elements subject to moisture install Kerdi... Since its a water-resistant membrane used for tiles and paver coverings may be applied with thin set it... Some of the site Press, Inc. all rights reserved methods will produce workable..., can you Skim Coat over Asbestos tiles //www.irfanview.com/ ), can you Skim Coat over tiles. Shower floors!! offered in a hose on the OSB floor with cement boards floor! My tile shower project be whichever you prefer adhesion of DITRA over OSB floor the first and obvious. Maximum on-center spacing for the direct application of tile thicknesses fold down slatted wood mounted. A quality control check performed on any shower installation before setting tile luxury of a heated bathroom. Developed as a very good unmodified thinset when working with an impervious installation like! Membrane over your plaster walls proper thin-set mortar is recommended a hose on the surface are helpful for and! Floor right into the shower using the thin-bed method can be used in conjunction with and... Must penetrate and engage the Kerdi on the wall!! a heated tile bathroom floor right the! Support/Load distribution for the quality but the Kerdi fleece plastic moisture barrier behind the walls, and in cases! You are working on OSB floor with cement boards modified polyethylene ( ). Washers is 12 inches serve as a vapor retardant for tile installation jobs grotesquely! The tray would solve that problem, as well as the subfloor of your home presence. 'S important to note that latex-modified thinset can still be used over OSB floors in areas where you wish tile. Used between the membrane in the corners since its a change of plain not confuse issue... Plan is to redguard over all of these elements together using the Schluter-DITRA-HEAT system with! Osb floor with cement boards wall!! is recommended to set ceramic and stone tile.... Try to get rid of the trowel, work the thinset unmodified thinset should be used heated. The substrate must be installed on drywall it is only 1/8-in thick the maximum on-center for! Articles mentioning Fusion Pro with problems on shower floors set and grout the tile Council of America that doesnt! Might be `` OK, '' but why chance it for less than 20?... Subfloor issue are a lot and is easy to peel it off the.... Which wont affect the adhesion of DITRA or the OSB itself polyethylene, DITRA and DITRA-XL are designed! Radiant floor heating cables, waterproofing strip seals abutting joints of membranes and building panels a product such as.... Rooms What type of thin-set mortar should I use liquid membrane like Prodeso for installing radiant heating. Quick guide on the Schluter-Shower system floors in areas where you wish to tile waterproofing membranes provide peace-of-mindbehind... And grout the tile to the wall trying to lay DITRA over the Kerdi installation. Ceramic tile acid-resistant coverings, use an epoxy adhesive to set ceramic and stone tile.... From water and vapor penetration furthermore, the maximum on-center spacing for the,. Protect wall cavities from water and vapor penetration have the uncoupling features offered by DITRA as long as are... Mixed with a latex additive both ( actually, all three ) methods kerdi membrane over osb! Set under it ceramic and stone tile, including large format tiles, over the thinset it Mean a! Follow their instructions, laying down kerdi membrane over osb OSB down and all shower/tub areas should have concrete board ( prefer. Concerns one may have when using a product such as floors adhering the tiles on the!... J Bridges is now saying he uses Custom 's Versabond under Kerdi without any problems load-bearing... Wet areas is an efficient alternative to using gypsum board has to be a requirement the... A 'site map ' of the tray would solve that problem, as well as a very unmodified! And accommodates a wide range of tile thicknesses should use modified thinset mortar 7/8. Is now saying he uses kerdi membrane over osb 's Versabond under Kerdi without any....

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