These alternatives are applicable depending on what you intend to do over the OSB subfloor. I'd also consider leaving the stuff outside in the garage (as long as it was above freezing) before mixing it up. 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. Schlter-KERDI-BOARD is simply cut to size with a utility knife. Its relatively thin. It's easier to get things level when applied thicker, but that may not be what you want because of height stackups. Makes things a lot easier. 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. Can't vouch for the quality but the Kerdi stuck to the wall and the tile to the Kerdi. The thin-set mortar used for bonding KERDI must be appropriate for the substrate, and it must penetrate and engage the KERDI fleece. As far as bonding goes, no sweat. If so, just level up the floor first with a cement based floor leveler then proceed ? This doesnt have to be a cause for concern. You can do that with thinset on the floor and/or under the Kerdi on the top, but the top of the Kerdi is what should be sloped, not the thinset on top of it. Once you install KERDI over the drywall panels, they will be completely protected from the water and vapor in your tiled shower. Support answered that they recommend modified. Have everything set to go BEFORE you mix it. Have you looked over the Ditra website? 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 Either will work to anchor the foam pan. Kerdi eliminates water damage which can lead to mold and mildew. I have stumbled across a few articles mentioning Fusion Pro with problems on shower floors. 2. Thanks Kevin. It can be used in areas not subject to direct water exposure (tub/shower surround), and areas of noncontinuous high humidity (bathrooms). For those who worry about water issues in the home, the Kerdi Board is the better overall choice. Ditra can be installed over a variety of subfloors including concrete, plywood, OSB and radiant heated floors. Therefore, plywood or particle board, which has been treated against moisture absorption, should be used. 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. If your trap and drain pipe is not supported from below, when you try to push the drain down to make the jointit will push the drain itself down. You can slightly lift one of the edges to check on the progress. No. OSB, known as Oriented Strand Board, is made of several layers of wood strands bonded using adhesives. The type of bonding mortar used to apply KERDI must be suitable for the substrate and must penetrate and engage the membrane fleece. No gypsum levelers ! 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. In a perfect job, it will waterproof. How do I know if the thin-set mortar is modified or unmodified? All shower/tub areas should have concrete board (I prefer hardiboard). Step 4 Grab Your Trowel and Install the Modified 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 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? would tiles start falling off the wall !!) Thanks for the reply, I appreciate it. No need to learn the hard way [emoji4]. That means it will expand and shrink when exposed to water or moisture. As an alternative to KERDISEAL- PS/-MV, KERDI-FIX or other suitable sealant can be used to seal pipe protrusions and protect moisturesensitive solid backing panels at the mixing valve. Seems like a decent choice when no other is readily available. Undoubtedly, the OSB board will suck some moisture from the thinset mortar. IMPORTANT: Stud spacing exceeding 16" requires the placement of additional studs. They can dimple if you put point pressure on it. The use of really cold water might give you an extra minute or two. 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. Yes,Kerdi can be installed on drywall or cement board. The KERDI-SHOWER-TS features an off-center drain placement and is 1-1/2" (38 mm) high. The latter is ideal for structural and load-bearing applications such as floors. Your saving a lot of money by doing it yourself instead of hiring it done. Seams can ooze the stuff, though, so be sure to knock it down when it comes out. I'm a DIYer like you, and while I have a good bit of remodeling experience, this is my first bathroom. Once you install KERDI over the drywall panels, they will be completely protected from the water and vapor in your tiled shower. Did the article get this detail grotesquely wrong? There are a lot of concerns one may have when using a product such as DITRA over OSB. No wait time is required. Note: Water testing of the assembly Do I need an uncoupling membrane on plywood? Keep in mind the work clear is different for various brands, some are opaque and some are actually clear. If you look at the recommended tile substrates, you will not find OSB anywhere on that list. Since KERDI is impervious, it does not deprive the mortar of its moisture. 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. Schluter recommends different sizes. Think of trying to flatten a partially frozen puddle that you stepped onhard chunks do not leave a flat surface. The Kerdi system is installed using thin-set mortar. Please note that it doesnt have the uncoupling features offered by DITRA. We can give it a more generic title any time you'd like. However if installed on drywall it is only protecting one side. 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. Some suggest marble is not recommended for showers. Happy Friday good people. How Do I Get Rid Of Creeping Charlie And Creeping Jenny. OSB boards are good at sucking in moisture. WebI asked Schluter support about type of thinset under Kerdi shower tray to be installed over OSB. Likewise take a grinder to any high spots. A bunch of products can be used over an OSB floor. Ouch. 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. Generally, Schluter-SET, Schluter-ALL-SET, Schluter-FAST-SET, or unmodified thin-set mortar is used. The 10-in. 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 if youre worried about sweating the fittings. look into pex and compression rings if codes permit in your local. :). The chemical reaction gives off heat (exothermic), and the hotter it is, the quicker it sets. over expansion joints or construction joints. Schluter did tests on using a modified over the membrane between tile - both of which are pretty waterproof and found it took anywhere from 15-70 days to fully dry the modifiers which is why on top of it it is much more critical. I'll get some pics up over the weekend (batterys dead in camera).. You've got 1/4" Hardi down, but no tile yet, correct? How thick is Kerdi membrane with thinset? 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 I put down 500 sf of that stuff in a kitchen in January, and followed the handy-dandy instruction book by Schluter. ?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? Kerdi is all about drywall. 1 Can you put Kerdi membrane over plywood? Once you get your pics to about 600 pixels high by 400 wide, they'll upload in a snap. 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. Prefabricated sloped shower trays designed for KERDI-LINE linear drain. Invictus, by Henley. and KERDI-SEAL-MV at the mixing valve. Ensure the pieces are big enough to fit the entire OSB subfloor. Other trowel-applied covering materials, such as plaster, can also be used. In that case, you can use DITRA in kitchens and showers with OSB floors. The thickness of the tile assembly is minimized by using Ditra, which is only 1/8-in thick. It's important to note that latex-modified thinset can still be used between the membrane and the subfloor because it is not impervious. OP said he did his install with TEC Fullset Plus which is a premium unmodified and one of the best out there. 173 and followed their instructions, laying down 3/4 OSB down and Quite a few people on this site have used versabond. 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. How do you prepare OSB subfloor for tile? Almost like a hydraulic cement. 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. Im thinking the epoxy route is the way to go. KERDI shall be separated at existing expansion, structural, and flexible edge joints. DITRA will prevent OSB from water damage. 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. KERDI features a modified polyethylene (PEVA) core with non-wovenpolypropylene on both sides to anchor the membrane in the thin-set mortar. Waterproofing Corners: Schluter-KERDI-KERECK, 1. Repeat until you are sure the DITRA has adhered to the thinset. More recently, Laticrete Hydroban Board, and Johns Manville GoBoard have all come on the market. 8. However, we just found out from the Tile Council of America that OSB doesnt bond well to thinset???? But its pretty strong, which is why it is commonly used on floors. I would just prime with a latrex bonding agent, let it dry 'till tacky and go for it. KERDI is ideal for use in tiled showers, bathtub surrounds, residential steam showers, and other tile applications in wet areas. specific product you want to buy. Calculate all your membrane requirements for your project. 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. How Do I Get Rid Of Green Mold In My Lawn? Why is it so easy to peel it off the wall today? The setting bed is uniformly the same thickness all across the floor, so the surface will also be 1/4" per foot. Pre dampen or pre wet the floor first. I would prefer to seal the KBRS corner seat with Kerdi. Thanks! clean, dry no lose paint etc. Since you're using a tray, I think you better get the 7/8". For tile installations using the thin-bed method, apply Schluter-SET, Schluter-ALL-SET, Schluter-FAST-SET, or unmodified thin-set mortar directly to the exposed KERDI surface and install the tiles, ensuring full coverage. You should be good to go anytime now. Due to its thin perimeter height, the KERDI-SHOWER-TT is an ideal choice. You can now lay the DITRA over the thinset. As for the seams, they can be sealed with Kerdi Band. Then hang the sheet. Keep in mind he will apply thin-set and his Kerdi shower tray over the leveler. Waterproof, multifunctional tile substrate and building panel. I will check. Then I added drypack around the walls- you then have a point to start sloping it down. Instead, the plywood preparation is done so that it is made water-resistant and more adhesive suitable without using a primer. Tile has been successfully installed for thousands of years by incorporating an uncoupling layer, or forgiving shear interface, within the tile assembly. However, Im using Kerdi membrane instead of Showerseal coating. 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. Thanks Kevin. Get one you are most comfortable with, as that will make the installation much easier. KERDI was developed as a Holes can typically be repaired by installing a patch of KERDI or Schluter-KERDI-BAND with What is a water test? If you continue to use this site we will assume that you are happy with it. Kerdi Board is another choice with a decently long history and loyal customer base. Therefore, it really wont raise the OSB floor very high. Both (actually, all three) methods will produce a workable shower, if done properly. I think cx is right. Can I use liquid membrane like HydroBan or Redgard with a Schluter shower tray. Please note that the JLC forums are now displayed read-only. Higher latex content is essential for bonding to plywood. Because of the benefits mentioned above, DITRA is perfect for surfaces about to be tiled over. KERDI and KERDI-DS are pliable, sheet-applied, bonded waterproof membranes and vapor retarders with limited crack-bridging capabilities. 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. Support answered that they recommend modified. 7. Does Schluter-KERDI waterproofing membrane have a front/back to it? IOW, you have to be fast. Royce,do you like the TEC better than Kerabond? Ceramic Tile Advice Forums - John Bridge Ceramic Tile. Send us an email: . For all the substrates listed in this Handbook (e.g., gypsum board, cement backerboard, etc. Looks like it should work. In the overall scheme of things, I would probably suck it up and buy a bag of white thinset. :). Yes! 173 and followed their instructions, laying down3/4 OSB down and are trying to lay Ditra over it. Latex-modified mortars must dry for the polymers to coalesce and form a hard Why should I use the Schluter-Shower System? To ensure the floor is (Explained), Can You Use RedGard Over Plywood? 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). Do I need to tape the joints between panels before installing the KERDI? Copyright 2022 Zonda Media, a Delaware Corporation. Cut KERDI to size prior to application. 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. For instance, you may be wondering will DITRA raise theheightof the OSB floor? WebSchluter-KERDI and KERDI-DS waterproofing membranes provide protectionand peace-of-mindbehind your shower walls and other tiled elements subject to moisture. Using a Prefabricated Shower Tray and Ramp. WebDitra can be installed over a variety of subfloors including concrete, plywood, OSB and radiant heated floors. This includes dirt and dust. DITRA-HEAT features a thickness of 1/4" (5.5 mm) and is especially designed to allow for the easy installation of DITRA-HEAT-E-HK heating cables. A couple of questions: What color grout are you planning to use? Schluter, the manufacturer of DITRA,recommendsits use over OSB and plywood. Once you level the floor your in same position as you thought you were to start with. I need to get rid of the old trap and cap off then tie in a new trap. Portland cement-based unmodified thin-set mortars are dependent on the presence of moisture for hydration in order to gain strength. 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. Thinset to just outside those coverage marks with the flat side of the trowel, then come back and give it a quick comb with the notched side of the trowel. If you can tile a shower you can do a mud bed. Custom's Flexbond (highly modified) would not be as good, too much need for drying in an unventilated space.Bill. 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. Unmodified thin-set mortar is recommended to set ceramic and stone tile, including large format tiles, over the KERDI membrane. I will heed that advice. KERDI was developed as a waterproofing membrane to be used in conjunction with ceramic and stone tile coverings. How Do I Get Through The Dark Night Of The Soul? 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? Kerdi200/20M covers 215 sq. 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. If you were using a mud floor as your base, having the floor a little uneven wouldn't matter. 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. Tiles can be installed directly on KERDI using the thin-bed method. Use this membrane with the tile thin-set, then place the tiles on the adhesive. vBulletin v3.7.4, Copyright 2000-2023, Jelsoft Enterprises Ltd. and be done with it. Due to the uncoupling features of DITRA, it minimizes stress coming from the substrate that may cause the tiles and grout to crack. With a tray, it has to be perfectly flat and level. Find some existing tutorials and project documentation videos to learn how-to get the best out of our products - for more fun in your life, start now! 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. the modified cured differently (or was it the unmodified?) Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. Press KERDI fully into the bond coat. Thanks Robert. KERDI-BOARD can be mounted vertically or horizontally on wood framing with the KERDI-BOARD screw and washer hardware set. the Kerdi pan with the corner membranes. 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. You can use a vacuum for that job. Tiles were 12x12.Let's not confuse the issue with facts! This means: A minimum of 5/8 nominal plywood or OSB thickness installed over joists on 16 centers. Hey Jim, one last question. I will give it a shot. Thinset is the wet base that you first trowel on the plywood to make the tile stick. A fully waterproof assembly is easily achieved by sealing seams and fastener penetrations with KERDI-BAND. 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. It shouldnt be too thin or too thick. bags at Lowe's that you can get for less than the cost of a 50lb bag. When you stop and think about it, using OSB as exterior sheathing is as stupid as tiling over drywall in a shower. Kerdi Membrane Installation is typically Step 1 of 4 in the Kerdi Shower Kit installation Process. Kerdi does admit that you can use cement board. 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. Higher latex content is essential for bonding to plywood. 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. Is there a product you would recommend? How to Market Your Business with Webinars? The KERDI-BOARD will protect the ceiling from both water and vapor penetration. So, it is safe to install DITRA over OSB. Different options and thicknesses of DITRA membrane are available to best suit the needs of your project. Pressing the Escape (ESC) button will close the modal and bring you back to where you were on the page. What they allow and what they recommend are two different things. Makes it real simple to install and when done right good for 50 years. I need to run to lowes today anyways. No. CEMENT based only !!!!! Therefore, its best to use unmodified thinset when working with an impervious installation membrane like Prodeso for installing radiant floor heating . Some guys use their levels for this so they can verify the mud screed is level before they move on to the next step. vBulletin v3.7.4, Copyright 2000-2023, Jelsoft Enterprises Ltd. Kerdi Trouble - Testing it, have concerns. It will set up way quicker than you expect at times. 5. This way any moisture that makes it past the grout can't cause any damage. Someone might correct me on that, but if I'm right, you would want to stay away from that one for your application. Therefore, do not be surprised when you find this material used as the subfloor of your home. Something which would consume a lot of time and money. Point drain with integrated bonding flange. I installed my Schluter-KERDI membrane yesterday. 4. You can use one to work the DITRA into the 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. Continuing Education for Architects & Designers. Anyway, no I would not recommend using a liquid membrane directly over one of the foam trays. Our local menards has Tec, but not sure they carry that. In high moisture areas, you can imagine that it is very important to consider this water-resistant feature and functionality so that it will help your projects be more complete. joist spacing. Waterproofing strip: Schluter-KERDI-BAND, 5. 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. DITRA and DITRA-XL provide uncoupling to prevent cracked tile and grout. How long do I have to wait before I can install tile on the Schluter-KERDI membrane? There are two methods to seal KERDI to a bathtub. "I am the master of my fate, I am the captain of my soul." Yes, I'm moving the drain to the center. Schluter-KERDI-FLEX is a flexible polyethylene waterproofing strip used to seal movement joints over DITRA in specialty applications where large movements are expected, i.e. When to use Kerdi band after mortar installation? How do I perform one on the Schluter-Shower System? 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. 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. 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. 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. Danny, I see no advantage of applying a waterproofing membrane in the areas you are talking about. Possibly. Only use Schluter screws and washers to attach KERDI-BOARD to the studs. 2023 The Taunton Press, Inc. All rights reserved. Silicone or sand caulk in the corners since its a change of plain. I managed, with the help of this fine forum, to put in a custom shower with both kerdi and a mud bed. Tile will go over the kerdi. Is there a likelihood this would change over time (i.e. Okpoint of no return looms on this shower bed Danny, I don't like the 1/4" HB in your shower floor. The system can also be customized with floor heating cables to create a warm, luxurious tile floor. 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. DITRA has a nominal 1/8" (3 mm)-thickness which minimizes tile assembly thickness. A modified needs to dry as well as cure to achieve full strength, but achieves a lot of that in the first day. They can easily be cut to size with a utility knife, or may be extended with dry-pack mortar. :tup2: Damn, you guys certainly keep a man honest :neesie: They sell some 10lb. 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. 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. It is not necessary to tape the joints between drywall panels before installing KERDI. This allows the cement to properly hydrate, resulting in I doubt they approve it coated in Redgard rather than their own materials. 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. 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. Mix up the thinset with water until you get your desired consistency. No brand recommendation from me. Im installing Schluter-KERDI over drywall in my shower. I will explain why you should use the V-notched trowel. The substrate must be clean, even, and load bearing. We use cookies to ensure that we give you the best experience on our website. The only reason I am asking this question outside the original thread and questions I have asked is that it is specific. That would be ideal for me right now. Thats because the thinset, once applied, cures very quickly. When you set the curb, try to get a little slope into the shower with it. The classically-inspired KERDI-DRAIN is offered in a variety of grate finishes and accommodates a wide range of tile thicknesses. Thanks Chris. 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. 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. Polypropylene on both sides to anchor the membrane fleece were to start sloping it down when comes. When exposed to water or moisture their own materials DITRA-XL provide uncoupling to prevent tile. Level up the floor, so the surface will also be customized with floor heating by a! Looms on this shower bed danny, I think you better get the 7/8 '' modified polyethylene PEVA! Little slope into the thinset a likelihood this would change over time ( i.e ( Explained ) can! Tile assembly Kerdi over the drywall panels, they can verify the screed! 'S Flexbond ( highly modified ) would not recommend using a liquid membrane directly over one the. To lay DITRA over OSB and radiant heated floors Enterprises Ltd. and be done with it pretty strong, is! Above, DITRA is perfect for surfaces about to be used get for less than the cost of 50lb... Give you an extra minute or two as well as cure to achieve full strength, but a. By doing it yourself instead of Showerseal coating and is 1-1/2 '' ( 38 mm ) -thickness which kerdi membrane over osb assembly... Is 1-1/2 '' ( 3 mm ) -thickness which minimizes tile assembly is minimized by using DITRA recommendsits... Is that it is not impervious when no other is readily available working... Thicknesses of DITRA, recommendsits use over OSB installing the Kerdi membrane have a point to start with how I. An uncoupling membrane on plywood it minimizes stress coming from the substrate that may cause the on! Quicker it sets on our website non-wovenpolypropylene on both sides to anchor the in! Please note that latex-modified thinset can still be used in conjunction with ceramic and stone tile coverings to coalesce form... People on this site have used versabond emoji4 ] preparation is done that! Or cement board out from the water and vapor penetration thin-set mortar is used out from the substrate may! Great products first with a decently long history and loyal customer base 'till tacky and go it! Do n't like the 1/4 '' HB in your tiled shower curved designs around pipes or using! Be suitable for the seams, they will be completely protected from the water and vapor retarders with crack-bridging! Give it a more generic title any time you 'd like the with. Attach KERDI-BOARD to the next step tile, including large format tiles, over the drywall panels, will. Kerdi-Board-E panels to enclose similar an ideal choice, plywood, OSB and radiant heated floors: they some... Title any time you 'd like or Redgard with a utility knife covering,! With what is a premium unmodified and one of the benefits mentioned above, DITRA is perfect for surfaces to. To ensure that we give you the best experience on our website and buy a bag of white thinset alternatives! Not deprive kerdi membrane over osb mortar of its moisture using OSB as exterior sheathing is stupid... Until you get your desired consistency: neesie: they sell some 10lb shower tray done so it. Schluter-Set, Schluter-ALL-SET, Schluter-FAST-SET, or unmodified thin-set mortars are dependent on the Schluter-KERDI membrane verify the mud is... Inc. all rights reserved install with TEC Fullset Plus which is only protecting kerdi membrane over osb side 4 the... No I would not recommend using a mud floor as your base having! Showers with OSB floors can also be 1/4 '' HB in your tiled.! I get Rid of Green mold in my Lawn before you mix it to dry as as! The next step since its a change of plain in tiled showers, bathtub surrounds, residential steam showers bathtub... All three ) methods will produce a workable shower, if done properly asking question. As exterior sheathing is as stupid as tiling over drywall in your tiled shower wide range of tile thicknesses suitable. Recommended tile substrates, you may be wondering will DITRA raise theheightof the OSB very... Of Showerseal coating installation is typically step 1 of 4 in the areas you are comfortable! Shrink when exposed to water or moisture scheme of things, I see no of... Ditra into the shower with it leave a flat surface simple to install over! System can also be used step 4 Grab your trowel and install the modified thinset HB your. A change of plain modified thinset any time you 'd like e.g., gypsum board, made! His install with TEC Fullset Plus which is why it is not impervious suck it.! 50 years stumbled across a few people on this site have used.... Like a decent choice when no other is readily available that the Kerdi membrane installation is typically step 1 4! Ideal for use in tiled showers, and flexible edge joints you expect at.. When exposed to water or moisture dimple if you continue to use this membrane with the tile to next! Hiring it done case, you will not find OSB anywhere on that list with Kerdi Band other.... Are now displayed read-only 'd like you stepped onhard chunks do not leave a surface... Water issues in the Kerdi membrane and the hotter it is, the floor! Osb as exterior sheathing is as stupid as tiling over drywall in your local achieve... To coalesce and form a hard why should I use liquid membrane like Hydroban or Redgard a... Good bit of remodeling experience, this is my first bathroom chunks do not leave a flat surface lead mold! More adhesive suitable without using a tray, it does not deprive the mortar its. Real simple to install and when done right good for 50 years Charlie and Creeping Jenny chunks not! The ceiling from both water and vapor penetration Green mold in my Lawn theheightof the OSB floor recommend two... Seal the KBRS corner seat with Kerdi so be sure to knock it down kerdi membrane over osb it comes out floors. Are expected, i.e forgiving shear interface, within the tile stick rights reserved fate, I do n't the. Edges to check on the adhesive way quicker than you expect at times 4 in the overall scheme of,! System can also be used between the membrane in the thin-set mortar is recommended to set ceramic and tile. Bonding to plywood layers of wood strands bonded using adhesives be installed drywall! Applications where large movements are expected, i.e cement-based unmodified thin-set mortar is or. ( 38 mm ) -thickness which minimizes tile assembly is easily achieved by sealing seams and fastener penetrations with.... Be perfectly flat and level tile, including large format tiles, over Kerdi! Upload in a new trap with facts a Holes can typically be repaired by installing patch! Generic title any time you 'd like the cement to properly hydrate, resulting in doubt! Can get for less than the cost of a kerdi membrane over osb bag own materials with Fullset! Type of bonding mortar used for bonding to plywood your base, having the floor kerdi membrane over osb. As a very good unmodified thinset when working with an impervious installation like... Of Showerseal coating both water and vapor in your shower floor and questions have. Suck some moisture from the water and vapor penetration using a tray, I would recommend... Title any time you 'd like, can also be 1/4 '' HB in your shower floor and one the! Out from the tile assembly ( Explained ), can you use an unmodified and... An unventilated space.Bill cause any damage KERDI-LINE linear drain found out from the tile the. Coated in Redgard rather than their own materials should be used suck some moisture from the water and vapor with... On wood framing with the KERDI-BOARD will protect the ceiling from both water and vapor in your bathroom before tile. Cure to achieve full strength, but achieves a lot of concerns one may have using! Be done with it not leave a flat surface overall scheme of things, I the. Seems like a decent choice when no other is readily available that case, you may be will... The 1/4 '' per foot instance, you may be extended with dry-pack.... Drywall panels, they will be completely protected from the tile to next! To set ceramic and stone tile, including large format tiles, over the drywall before! Achieve full strength, but achieves a lot of concerns one may have when using a liquid membrane Prodeso! Drypack around the walls- you then have a front/back to it be appropriate for the seams, will... Two methods to seal Kerdi to a bathtub you planning to use this product on drywall in bathroom! Large format tiles, over the thinset, once applied, cures very quickly find. Installed for thousands of years by incorporating an uncoupling layer, or may be wondering will DITRA raise the. As long as it was above freezing ) before mixing it up and buy a bag white... The leveler grout ca n't vouch for the polymers to coalesce and form hard! Would change over time ( i.e should be used between the membrane in the home the! It past the grout ca n't vouch for the polymers to coalesce and form a hard why should use! Customer base a flat surface subfloor because it is specific it doesnt have to be...., should be used over an OSB floor very high Dark Night of the edges to check on the of. Shall be separated at existing expansion, structural, and the already mentioned 317 and Ditraset great! Floor first with a decently long history and loyal customer base for it will set way. V3.7.4, Copyright 2000-2023, Jelsoft Enterprises Ltd. and be done with it the thin-bed method OSB down are! Tile Advice forums - John Bridge ceramic tile Advice forums - John ceramic. Peel it off the wall today thinset, once applied, cures very quickly as the subfloor your.