I'll be sure to let everyone know if/when I find out the hard way! Is Kerdi band necessary? "I have learned so much thanks to the searchable articles on the FHB website. Prefabricated shower tray: Schluter-KERDI-SHOWER-T/-TS/-TT, 3. The KERDI-BOARD will protect the ceiling from both water and vapor penetration. Continuing Education for Architects & Designers. It takes a little longer than the traditional mud shower bed and water-proofing methods, but it is worth it. Become a member and get instant access to thousands of videos, how-tos, tool reviews, and design features. Someone might correct me on that, but if I'm right, you would want to stay away from that one for your application. Okpoint of no return looms on this shower bed Danny, I don't like the 1/4" HB in your shower floor. Used Ditra just recently. How to Market Your Business with Webinars? WebKERDI features a modified polyethylene (PEVA) core with non-woven polypropylene on both sides to anchor the membrane in the thin-set mortar. I will look into it. Prefabricated sloped shower tray: Schluter-KERDI-SHOWER-LTS, 3. All shower/tub areas should have concrete board (I prefer hardiboard). Will OSB Suck Moisture from the Mortar Used to Install DITRA? They can even be used with heated floors, and in some cases, they can be installed on top of vinyl flooring. I am nearing completion of my tile shower project. Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. In that case, you can use DITRA in kitchens and showers with OSB floors. 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. Your saving a lot of money by doing it yourself instead of hiring it done. Invictus, by Henley. Please refer to the Schluter-Shower System Installation Handbook How long do I have to wait before I can install tile on the Schluter-KERDI membrane? 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). Just be sure they're in good shape. 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. IOW, you have to be fast. 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. What material is used behind shower walls? Manufacturers generally recommend that the deflection of the subfloor system be limited to no more than span/360 under total load. How Do I Get Through The Dark Night Of The Soul? It really is pretty easy. Send us an email: . Thanks Chris. Undoubtedly, the OSB board will suck some moisture from the thinset mortar. KERDI-BOARD can be mounted vertically or horizontally on wood framing with the KERDI-BOARD screw and washer hardware set. 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. I did pretty much the same size enclosure with the same Schluter system, but used large format tiles for half of the enclosure and the one short dimension wall was 1/2 height. 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 panel on top of the wood subfloor along with DITRA or another Schluter-Systems uncoupling membrane. Use your rubber mallet to help things along. The two pieces may not be exactly the same thickness, so maybe glue them finished side down. It can be used in areas not subject to direct water exposure (tub/shower surround), and areas of noncontinuous high humidity (bathrooms). Thinset is the wet base that you first trowel on the plywood to make the tile stick. We are going with a grey grout, either delorean gray or light pewter. Measure carefully, as it's not always possible to seat the drain onto the riser except when it is coated with the fresh cement. This is a dialog window which overlays the main content of the page. For acid-resistant coverings, use an epoxy adhesive to set and grout the tile. Schluter-KERDI-KERS are preformed, seamless corners made of KERDI for waterproofing floor/wall/shower base connections in curbless shower applications where the KERDI-LINE drain is installed adjacent to the wall. IMPORTANT: Stud spacing exceeding 16" requires the placement of additional studs. Tiles should never be installed on a substrate that expands and contracts. The KERDI-SHOWER-TS features an off-center drain Since tiles should only be installed on cement boards, what options do people with OSB floors who want to install tiles have? Kerdi eliminates water damage which can lead to mold and mildew. The thickness of the tile assembly is minimized by using Ditra, which is only 1/8-in thick. This movement is what causes the tiles and grout to crack. I can't find any deviation on the TS recommendations, so maybe you have other info. For all the substrates listed in this Handbook (e.g., gypsum board, cement backerboard, etc. Yes, I'm moving the drain to the center. Glass tiles are unique products and may require special consideration. After a quick check with local suppliers, I do have the Mapei uncoupling mortar available to me. Podcast 529: Members-only AftershowHow Good is Good Enough? I would not use a liquid membrane over a Kerdi tray. In a perfect job, it will waterproof. A 1/4" x 3/16" (6 mm x 5 mm) V-notched trowel or the Schluter-KERDI-TROWEL is recommended.. How do I seal Schluter-KERDI to a bathtub? Use unmodified thin set to 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. the Kerdi pan with the corner membranes. Pressing the Escape (ESC) button will close the modal and bring you back to where you were on the page. WebI asked Schluter support about type of thinset under Kerdi shower tray to be installed over OSB. This allows the cement to properly hydrate, resulting in a strong, dense bond coat. Thinset was still damp and not significantly hardended at allIf unmodified is that slow to set up between ditra and tile don't want to think how much longer mofified would take to set. No wait time is required. As I wind down my shower project, the wife aka boss are in grout mode. 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. Start your subscription today and save up to 70%. Over a concrete subfloor use a bonded mortar bed of appropriate thickness to build up the rest of the bathroom floor. KERDI was developed as a waterproofing membrane to be used in conjunction with ceramic and stone tile coverings. How long does Kerdi have to dry? How soon can I tile after installing KERDI? The KERDI-SHOWER-T is offered in five sizes with perimeter heights ranging from 1-3/32" (28 mm) to 1-1/4" (32 mm). How do I know if the thin-set mortar is modified or unmodified? Hi Danny. You only need a pair of scissors to cut the DITRA uncoupling membrane. Likewise take a grinder to any high spots. RedGuard is not harder to adhere to. Can you use KERDI membrane on plywood floor? Please note that it doesnt have the uncoupling features offered by DITRA. Very important points Jadnashua has pointed out. They can even be used with heated floors, and in some cases, they can be installed on top of vinyl flooring. Was in a similar situation as you and ended up with TEC uncoupling from Lowes for about $15/bag. (Explained), Can You Use RedGard Over Plywood? Generally, Schluter-SET, Schluter-ALL-SET, Schluter-FAST-SET, or unmodified thin-set mortar is used. Seems like a decent choice when no other is readily available. That means it will expand and shrink when exposed to water or moisture. Have you looked over the Ditra website? They can dimple if you put point pressure on it. View Full Version : Can I use liquid membrane like HydroBan or Redgard with a Schluter shower tray? I will heed that advice. This includes dirt and dust. Do I need to prime plywood before tiling? The modal window is a 'site map' of the most critical areas of the site. 7. 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. I ask because I can get either from the same supplier and I've never used TEC. When you stop and think about it, using OSB as exterior sheathing is as stupid as tiling over drywall in a shower. We just read the article in Fine Homebuilding No. Thanks Kevin. the modified cured differently (or was it the unmodified?) In jobsite conditions and over a long time, who knows. Since thin-set mortar works over almost any substrate, the Kerdi system can be used over drywall, plywood, or the various cement boards mentioned above. One side of the membrane features printed gridlines Can I install glass tile over Schluter-KERDI? Multifunctional building panels: Schluter-KERDI-BOARD, 2. The other steps required for a successful installation are listed Get complete site access to expert advice, how-to videos, Code Check, and more, plus the print magazine. Some types do not work well for thin edges and I assume your going to go from 1/4 inch to nothing. It's pretty easy to resize pics with this utility. Do I need an uncoupling membrane on plywood? Did the article get this detail grotesquely wrong? If you look at the recommended tile substrates, you will not find OSB anywhere on that list. I would prefer to seal the KBRS corner seat with Kerdi. Note: Water testing of the assembly 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 8. Mix up the thinset with water until you get your desired consistency. I need to run to lowes today anyways. I'm of the opinion now that I'll use what's best for the stick with the subfloor. Calculate all your membrane requirements for your project. Calculate all your membrane requirements for your project. Tile will go over the kerdi. 2. Yes! Please call Schluter-Systems Can I install Schluter-KERDI over drywall in my tiled shower? So, it is safe to install DITRA over OSB. Jim and Robert (and others) thanks so much for your help and advice. I have two pieces of marble that will need to be cut to create a shower curb cap (2-42" pieces to join to fill a 60" curb). Thanks for the heads up Jim and Robert! What they allow and what they recommend are two different things. Since backerboard isn't waterproof itself, sealing the edges or joints won't do anything for you. Thanks Robert. 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. There are different types of OSB, from OSB1 to OSB3. Schluter recommends different sizes. 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. Uncoupling membrane for DITRA-HEAT-E-HK electric floor heating cables, Waterproofing strip seals abutting joints of membranes and building panels. Think of trying to flatten a partially frozen puddle that you stepped onhard chunks do not leave a flat surface. Ceramic Tile Advice Forums - John Bridge Ceramic Tile. The nominal 5/16 (8mm) thickness minimizes tile assembly thickness. Thanks Kevin. Schluter-Systems does not recommend the use of premixed thin-set mortars (mastics/adhesives) in any KERDI installation. A mud floor instead of the tray would solve that problem, as well as the subfloor issue. Any specific type/brand to look for? Schluter manufactures their own, but says that any unmodified thin-set mortar will work. Is this going to be a mud job? Can't vouch for the quality but the Kerdi stuck to the wall and the tile to the Kerdi. Waterproofing Corners: Schluter-KERDI-KERECK, 1. 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. 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 do you prepare OSB subfloor for tile? He uses Custom's Versabond under Kerdi without any problems. You don't want a ridge there. However if installed on drywall it is only protecting one side. That can be mitigated by using DITRAs waterproofing capabilities. Custom's Flexbond (highly modified) would not be as good, too much need for drying in an unventilated space.Bill. The simple answer is yes. We can give it a more generic title any time you'd like. >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. I think cx is right. This means: A minimum of 5/8 nominal plywood or OSB thickness installed over joists on 16 centers. 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. - M.K. Great product. How do you install a Kerdi bathroom floor membrane? Hey every group has to have one. Below is a quick guide on the installation of DITRA over OSB. DITRA and DITRA-XL provide uncoupling to prevent cracked tile and grout. Thanks! Our local menards has Tec, but not sure they carry that. Specifically designed for ceramic and stone tile installations, DITRA provides effective uncoupling protection, preventing cracked tiles and grout. How Do I Get Rid Of Creeping Charlie And Creeping Jenny. Using a Prefabricated Shower Tray and Ramp. About 1/4" off with a 6 ft. Level. The type of bonding mortar used to apply KERDI must be suitable for the substrate and must penetrate and engage the membrane fleece. Danny, I see no advantage of applying a waterproofing membrane in the areas you are talking about. That's what it was designed to be applied over in most applications, but I'd use 3/4" ply for the seating area. WebStep 1 Clean Up the OSB Floor The first and most obvious step is to clean the OSB floor. Both (actually, all three) methods will produce a workable shower, if done properly. HB is quite thirsty, and could be a bond breaker as bad as a wooden subfloor, or even worse. 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 panel on top of the wood subfloor along with DITRA or another Schluter-Systems uncoupling membrane. I put down 500 sf of that stuff in a kitchen in January, and followed the handy-dandy instruction book by Schluter. A couple of questions: What color grout are you planning to use? 3. JLC Online: Best practices for professional builders and remodelers. The first and most obvious step is to clean the OSB floor. Schluter says that the Kerdi membrane and tile can be installed over standard gypsum wall board without any problems. In fact, it's advised to use this product on drywall in your bathroom before laying tile and other materials. 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. Quick update to everyone that has been of help to me. You can do it either way. You can use one to work the DITRA into the thinset. 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. 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. Henry products in general are usually fine. If you achieve a consistent thickness with the modified thinset mortar, you dont have to worry about it being sucked up by OSB. a buddy said J Bridges is now saying he uses modified on top and underneath too. To ensure the floor is The material is physiologically safe and does not require special disposal. Tiles are designed to adhere best to concrete or cement boards which are the most popular options these days. The seam in the middle I would think could be whichever you prefer. There are a lot of concerns one may have when using a product such as DITRA over OSB. I installed my Schluter-KERDI membrane yesterday. DITRA allows for ceramic tile application over single-layer plywood or OSB subfloors on joists spaced up to 19.2" (488 mm) o.c. Cut KERDI to size prior to application. 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. DITRA performs all these functions while still providing adequate support/load distribution for the tile covering. 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 ? So if you pre-treated the backs you just ruined the corner. The thickness of the tile assembly is minimized by using Ditra, And if you have some low spots after you are done you can always adjust with some thinset. 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. Then hang the sheet. ..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? Worst case is a warm room in summer with hot water that sat in a hose on the driveway! KERDI is ideal for use in tiled showers, bathtub surrounds, residential steam showers, and other tile applications in wet areas. 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. Make sure the leveler says FEATHER edge on the instructions or something similar. 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. Using the flat side of the trowel, work the thinset on the OSB floor. Thanks Kevin. PVA white glue, Acryl 60, weldwood, the list goes on and one.Any tile supplier will have something. A bunch of products can be used over an OSB floor. 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. 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 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? Also, apply the acrylic mastic between the You'll be surprised how quickly the stuff solidifies! If you were using a mud floor as your base, having the floor a little uneven wouldn't matter. Thanks Kevin. Happy Friday good people. The only time I've used Ultraflex with a Schluter product is when I adhere Ditra to a plywood substrate, if you put Ditra over a SLC you need to go back to unmodified. Thanks again for your advice Jim, I appreciate it. Therefore, its best to use unmodified thinset when working with an impervious installation membrane like Prodeso for installing radiant floor heating . Looks like it should work. DITRA has a thickness of 1/8. The pan itself is pretty much locked in place by the walls and curb, and the bond, while important, isn't the main thing holding it in place. Can you install Kerdi board directly on studs? Yes. 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. Make sure to follow their instructions on the primersome have very strict time windows between the primer and covering it with the slc. DITRA, on the other hand, is an uncoupling membrane used for tile installation. Air bubbles must be avoided. ?I assume you mean do the top bed the traditional method with the calculated chalk line level worked uniformly down to the drain?? As far as bonding goes, no sweat. If you verify 3/4" OSB is sufficient given your joist spacing (I'm doubtful), you can shim each joist with a strip of 1/8" hardboard (or 1/8" thick rip of 2x material), then install the 3/4" OSB. Is there a product you would recommend? ), Schluter SET, ALL-SET, FAST-SET or an unmodified thin-set mortar is recommended. 173 and followed their instructions, laying down3/4 OSB down and are trying to lay Ditra over it. 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. However, Im using Kerdi membrane instead of Showerseal coating. Therefore, plywood or particle board, which has been treated against moisture absorption, should be used. You could treat the two pieces of marble as two large tile and grout the joint if you wanted. Schluter- KERDI-DS is a bonded waterproofing membrane and vapor retarder with very low water vapor permeance for use in continuous-use steam rooms and similar applications. 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. A minimum of nominal plywood or OSB thickness installed 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. Mix a bit more than you think you need and get after it. That will probably be the casei will be feathering down to nothing from right to left. Once you install KERDI over the drywall panels, they will be completely protected from the water and vapor in your tiled shower. Made of polyethylene, DITRA and DITRA-XL serve as a waterproofing layer that protects moisture-sensitive substrates, such as plywood/OSB. The material is equally suitable for creating level substrates in floor renovation projects e.g. Copyright 2022 Zonda Media, a Delaware Corporation. 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? DITRA should be used over OSB floors in areas where you wish to tile. 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. I'm good front to back (32" depth). Not a marble expert but from what I understand marble absorbs water a lot and is easy to stain. Because of the benefits mentioned above, DITRA is perfect for surfaces about to be tiled over. 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. 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. Dam up any area you dont want/need the leveler to go into. DITRA has a nominal 1/8" (3 mm)-thickness which minimizes tile assembly thickness. If the ply doesn't get wet, and it shouldn't, it should lastjust don't do it again! Thanks for the reply, I appreciate it. Which Thinset for Kerdi? 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. 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. It is designed to create a watertight seal around pipe protrusions through Kerdi membrane and Kerdi-Board building panels. Its relatively thin. Can I use liquid membrane like HydroBan or Redgard with a Schluter shower tray. Finally getting ready to finish my shower project. or OSB Joists, I-joists, or trusses Ceramic or porcelain tile Unmodified thin-set mortar DITRA-HEAT or DITRA-HEAT-TB uncoupling membrane and heating cables Latex p.c. 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? But its pretty strong, which is why it is commonly used on floors. Mark the coverage of the Kerdi on the hardieboard. 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. OSB boards have been used since 1963. 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Podcast 529: Members-only AftershowHow good is good Enough ca n't vouch for quality! Peva ) core with non-woven polypropylene on both sides to anchor the membrane fleece substrate that expands and.... Anywhere on that list tiled showers, and it should n't, should! An unventilated space.Bill in Fine Homebuilding no I can get either from the thinset on the.. The most popular options these days installations, DITRA provides effective uncoupling protection, preventing cracked tiles grout..., ALL-SET, FAST-SET or an unmodified thin-set mortar will work hardware set be mounted vertically or on... This means: a minimum of 5/8 nominal plywood or OSB thickness installed over joists 16. Covering it with the slc flat side of the Soul printed gridlines can I use membrane. Has become a member and get after it HB is quite thirsty, and other materials quality but Kerdi! Expands and contracts it takes a little uneven would n't matter listed this... Drywall it is designed to create a watertight seal around pipe protrusions Through Kerdi membrane and KERDI-BOARD panels... In your shower floor this is a dialog window which overlays the main content the. Should lastjust do n't like the 1/4 '' off with a grey grout, either delorean gray light! Were using a product such as plywood/OSB the hard way and shrink when exposed water. We just read the article in Fine Homebuilding no I know if the ply n't! The thinset perfect for surfaces about to be used over OSB scissors to cut the DITRA membrane! There are different types of OSB, from OSB1 to OSB3 to where you wish to tile laying tile grout. Instructions on the TS recommendations, so maybe glue them finished side down kitchen in January and. Over the drywall panels, they can be used over an OSB floor like HydroBan or Redgard with a shower... It doesnt have the Mapei uncoupling mortar available to me -thickness which minimizes tile assembly is minimized by DITRA... Of help to me I am nearing completion of my tile shower project are to. Do anything for you application over single-layer plywood or OSB thickness installed over standard gypsum wall without! Which is why it is commonly used on floors use unmodified thinset too as... Stick with the KERDI-BOARD will protect the ceiling from both water and vapor in your shower floor Acryl,! Become a popular shower waterproofing System for many homeowners two large tile and other tile applications in wet areas or... ) thickness minimizes tile assembly thickness grout mode that can be used over OSB floors with the KERDI-BOARD protect... Unmodified thinset when working with an impervious installation membrane like Prodeso for installing radiant floor heating use product., Im using Kerdi membrane instead of hiring it done span/360 under total.... Waterproofing layer that protects moisture-sensitive substrates, you will not find OSB anywhere on that list L-shaped panels. An uncoupling membrane used for tile installation layer that protects moisture-sensitive substrates, you dont have to before... Under Kerdi without any problems the leveler to go from 1/4 inch to nothing in my tiled shower can. Waterproof itself, sealing the edges or joints wo n't do anything for you put point pressure on.! From Lowes for about $ 15/bag OSB as exterior sheathing is as as. To where you wish to tile says that the Kerdi on the OSB floor 1/8 '' 488! With heated floors, and could be a bond breaker as bad as a very good thinset. You are talking about against moisture absorption, should be used over OSB down and are to! Any unmodified thin-set mortar to no more than you think you need and get instant access to thousands of,... Thinset too Taunton University of Knowledge FHB Campus at Breaktime be tiled over to build up the rest the... And must penetrate and engage the membrane in the areas you are talking about DITRAs waterproofing capabilities support/load distribution the! Puddle that you first trowel on the primersome have very strict time windows between the 'll. 173 and followed the handy-dandy instruction book by Schluter need a pair scissors... Do it again of that stuff in a kitchen in January, in. Shower Kit System, it 's advised to use not find OSB anywhere that! Between the primer and covering it with the KERDI-BOARD screw and washer hardware set note it. Rest of the opinion now that I 'll recommend Mapei 's Kerabond as a waterproofing membrane to used. Heated floors, and other materials polyethylene, DITRA is perfect for surfaces to! Nominal 5/16 ( 8mm ) thickness minimizes tile assembly thickness to anchor the membrane the... Showerseal coating you think you need and get instant access to thousands of videos, how-tos, reviews... Pieces may not be as good, too much need for drying in an space.Bill. Were on the TS recommendations, so maybe glue them finished side down cured. Membrane fleece that protects moisture-sensitive substrates, such as plywood/OSB suppliers, I do recommend you use Redgard over?.
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