kerdi membrane over osb

Since my walls are still open the sweating should be tolerable.only gonna be against drywall on a few sweats and its the garage on the other side so its expendable wall if I need to cut access. Besides the fact that it is safe to use DITRA over OSB floors, there are many benefits that one gets from merging these two building products. They can even be used with heated floors, and in some cases, they can be installed on top of vinyl flooring. 3. The article says they used Latex modified mortar between the OSB and Ditra. Schluter-KERDI-BAND is a waterproofing strip used to seal butt joints and floor/wall connections with KERDI and DITRA membranes and KERDI-BOARD building panels. You should be good to go anytime now. You can use one to work the DITRA into the thinset. 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? The biggest issue with SLC is that it doesn't really self-levelit may get close, but surface tension prevents that unless you help it along (think pancake batter - it doesn't spread to fill the pan like water would, and even water beads up a little). 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. "Did the article get this detail grotesquely wrong?". I can't find any deviation on the TS recommendations, so maybe you have other info. 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. Epoxy grouts are pretty much maintenance free (at least they don't need a sealer). Schluter-KERDI-KERECK and KERDI-KERS-B are preformed, seamless corners made for waterproofing inside and outside corners of KERDI, KERDI-BOARD, and DITRA assemblies to prevent leaks and mold-growth. Become a member and get instant access to thousands of videos, how-tos, tool reviews, and design features. 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. To ensure the floor is clean, wipe it with a wet sponge. 2023 The Taunton Press, Inc. All rights reserved. If you were using a mud floor as your base, having the floor a little uneven wouldn't matter. Ditra can be installed over a variety of subfloors including concrete, plywood, OSB and radiant heated floors. Quite a few people on this site have used versabond. Thanks for the reply, I appreciate it. Over a concrete subfloor use a bonded mortar bed of appropriate thickness to build up the rest of the bathroom floor. DITRA-HEAT-DUO features an integrated bonding fleece that provides sound control, as well as a thermal break. Schluter-KERDI is a pliable, sheet-applied, bonded waterproof membrane and vapor retarder with limited crack-bridging capabilities. Kerdi fix does not stick to thin-set FYI. The system can also be customized with floor heating cables to create a warm, luxurious tile floor. California Specification 01350 is referenced by various green building standards and rating systems. (Explained). 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. Not good. 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. 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 :tup2: Damn, you guys certainly keep a man honest :neesie: They sell some 10lb. The setting bed is uniformly the same thickness all across the floor, so the surface will also be 1/4" per foot. Step 5 Install the DITRA Over the Thinset. Also your probably wanting it to look nice and function correctly for a long time to come. Not a marble expert but from what I understand marble absorbs water a lot and is easy to stain. Mix up the thinset with water until you get your desired consistency. Free-space on the underside of the matting provides a route for excess moisture and vapor to prevent damage to the tile layer above. Worst case is a warm room in summer with hot water that sat in a hose on the driveway! Not so good side to side. 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. Kgphoto Veteran Contributor Join Date: Jun 2004 Location: Los Angeles, CA 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. Tile will go over the kerdi. 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. DITRA should be used over OSB floors in areas where you wish to tile. Make sure the leveler says FEATHER edge on the instructions or something similar. This way any moisture that makes it past the grout can't cause any 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. - M.K. I never had done drypack before and it was pretty simple to do. Ceramic tiling can be installed onto 23/32 OSB subflooring panels where the panels are supported by 16 o.c. What material is used behind shower walls? For good new rock music, click on: http://www.wolfmother.com. Was in a similar situation as you and ended up with TEC uncoupling from Lowes for about $15/bag. 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. (Explained), Can You Use RedGard Over Plywood? The last step is to steel trowel the mud to clean up any loose sand. If you continue to use this site we will assume that you are happy with it. over expansion joints or construction joints. It will set up way quicker than you expect at times. There is never 'the answer' but 'an answer'. While the detail images below demonstrate options for KERDI-DRAIN, please note that raising the bathroom floor is also possible with KERDI-LINE. Thanks Robert. And, I am not against trying something new. That will probably be the casei will be feathering down to nothing from right to left. Well, im fearful but interested. Thanks! You don't want a ridge there. This site is protected by reCAPTCHA and the Google. ..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? Tile has been successfully installed for thousands of years by incorporating an uncoupling layer, or forgiving shear interface, within the tile assembly. Seems like a decent choice when no other is readily available. 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. Sorted by: 4. As a waterproof underlayment, DITRA has an open rib structure that neutralizes movement in a load-bearing substrate such as an OSB floor. 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. Since backerboard isn't waterproof itself, sealing the edges or joints won't do anything for you. Its a water-resistant membrane used for tiles and paver coverings. It can be used in areas not subject to direct water exposure (tub/shower surround), and areas of noncontinuous high humidity (bathrooms). You can slightly lift one of the edges to check on the progress. The thinset will help bond the DITRA to the OSB. Thanks for the heads up Jim and Robert! This may leave you wondering, wont the OSB suck moisture from themortarused in DITRA installation. I'm a DIYer like you, and while I have a good bit of remodeling experience, this is my first bathroom. Use unmodified thin set to How thick is Kerdi membrane with thinset? Get home building tips, offers, and expert advice in your inbox. ;). This is very important for OSB boards that are used as floors. DITRA has a nominal 1/8" (3 mm)-thickness which minimizes tile assembly thickness. Besides Schluters recommendation, several experts have used DITRA as an uncoupling membrane for tile installation over OSB. No gypsum levelers ! What Does It Mean When A Guy Spreads His Legs In Front Of You? Please call Schluter-Systems Can I install Schluter-KERDI over drywall in my tiled shower? The KERDI-SHOWER-TS features an off-center drain placement and is 1-1/2" (38 mm) high. Uncoupling membrane prevents cracked tile and grout. 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? Mark the slope or high point on the walls. No wait time is required. I accidentally poked a hole through the Schluter-KERDI while installing the membrane. Then hang the sheet. Thanks again Robert. 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. and KERDI-SEAL-MV at the mixing valve. One side of the membrane features printed gridlines Can I install glass tile over Schluter-KERDI? The other steps required for a successful installation are listed Support answered that they recommend modified. KERDI was developed as a waterproofing membrane to be used in conjunction with ceramic and stone tile coverings. 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? However if installed on drywall it is only protecting one side. Calculate all your membrane requirements for your project. http://www.johnbridge.com/vbulletin/showthread.php?t=91369. IMPORTANT: Stud spacing exceeding 16" requires the placement of additional studs. Multifunctional building panels: Schluter-KERDI-BOARD, 2. Ceramic Tile Advice Forums - John Bridge Ceramic Tile. Since you're using a tray, I think you better get the 7/8". With the KERDI-SHOWER-TT thin shower tray on a wood subfloor, you can build up the rest of the bathroom floor by installing either a 5/8 or 3/4 plywood/OSB Calculate all your membrane requirements for your project. Just be sure they're in good shape. Can't vouch for the quality but the Kerdi stuck to the wall and the tile to the Kerdi. Kerdi Trouble - Testing it, have concerns. 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. Which Thinset for Kerdi? Continuing Education for Architects & Designers. I used to work with this stuff years ago, and I can remember it hardening quickly. Hi Danny. 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. 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? 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. Silicone or sand caulk in the corners since its a change of plain. 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. Kerdi does admit that you can use cement board. I installed my Schluter-KERDI membrane yesterday. Neither one absorbs moisture and both offer some interesting features (glow in the dark! Go with a masonry bench or look into the better bench or nobel bench. How Do I Get Through The Dark Night Of The Soul? Waterproofing strip: Schluter-KERDI-BAND, 5. Jobsite Saw PRO has a wider table, a new dust-control port, and a more versatile fence, along with the same reliable safety mechanism included in all SawStop tablesaws. Its essential to use the recommended products to avoid disasters. Mark the coverage of the Kerdi on the hardieboard. Dont also forget the convenience that DITRA offers for tile installation jobs. It's easier to get things level when applied thicker, but that may not be what you want because of height stackups. JLC Online: Best practices for professional builders and remodelers. Cut a section of Kerdi off the roll and dry fit it on the hardie. We are very concerned about any moisture at all getting into the OSB. Some of the options you may consider include; Kerdi This waterproofing membrane acts as a vapor retardant for tile installation. Therefore, it really wont raise the OSB floor very high. Your saving a lot of money by doing it yourself instead of hiring it done. Use your rubber mallet to help things along. I have stumbled across a few articles mentioning Fusion Pro with problems on shower floors. That's what it was designed to be applied over in most applications, but I'd use 3/4" ply for the seating area. This includes dirt and dust. What they allow and what they recommend are two different things. With KERDI-BOARD, you can build custom vanities, shelving units, bathtub surrounds, free-standing partition walls, kitchen islands, and so much more. First Kerdi can be installed on drywall or cement board. and since the plastic did absorb any moisture . it did cure as quick and the "excess" moisture could screw up the grout. Using KERDI-BOARD to build walls over stud framing in wet areas is an efficient alternative to using gypsum board. 4. If I went the silicone route, and left let's say a 1/16" joint, tape edges of both pieces and completely filled the joint would you see any problems? The classically-inspired KERDI-DRAIN is offered in a variety of grate finishes and accommodates a wide range of tile thicknesses. ft. and is ideal for waterproofing tiled tub surrounds and showers. A quick answer to the above question is that DITRA can be installed over the OSB floor. 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? Portland cement-based unmodified thin-set mortars are dependent on the presence of moisture for hydration in order to gain strength. Used unmodified as called for between ditra and tile. Then I added drypack around the walls- you then have a point to start sloping it down. Good idea to dampen the OSB before you apply the leveler. "a buddy said J Bridges is now saying he uses modified on top"I believe that they are using a LIGHT modified TS.But I don't remember the brand.. If you intend to install another type of floor, such as hardwood, there is no need for DITRA. Send us an email: . Also, apply the acrylic mastic between the The Kerdi seems very well adhered to the plywood. "I am the master of my fate, I am the captain of my soul." 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. Hi guysI've been reading this forum for a few months and have had enough of the controversy over the use of Kerdi and how to install it. 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. When assembling products for this project, you should look for a V-notched trowel. 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. Seams can ooze the stuff, though, so be sure to knock it down when it comes out. 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. Provides uncoupling, waterproofing, vapor management and heavy load distribution. Then fill in the rest and slope it to the drain. KERDI-BOARD can be mounted vertically or horizontally on wood framing with the KERDI-BOARD screw and washer hardware set. They can easily be cut to size with a utility knife, or may be extended with dry-pack mortar. Thanks Chris. residential bathroom installations designed for foot traffic. say that I expect to be a life-long subscriber." The divot is necessary because clamping ring style drains, such as yours, have the sealing surface located about 1-1/4" down from the setting bed. Since tiles should only be installed on cement boards, what options do people with OSB floors who want to install tiles have? Some types do not work well for thin edges and I assume your going to go from 1/4 inch to nothing. 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. I think I was looking for someone to verify what I knew to be the answerha ha. Waterproofing strip seals abutting joints of membranes and building panels, Waterproof, multifunctional tile substrate and building panel, Point drain with integrated bonding flange, Bonded waterproofing and vapor-retardant membrane, Single-component sealing and bonding compound, Contact us: 888-472-4588 They can even be used with heated floors, and in some cases, they can be installed on top of vinyl flooring. 1 Can you put Kerdi membrane over plywood? 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. Use Thinset With a Higher Latex Content Thinset is the wet base that you first trowel on the plywood to make the tile stick. Is only protecting one side people with OSB floors who want to install another type floor... The walls- you then have a good bit of remodeling experience, this my. Concrete, plywood, OSB and DITRA get home building tips, offers, other. Look for a long time to come features printed gridlines can I install Schluter-KERDI over drywall in my shower... Placement and is easy to stain in your inbox within the tile assembly to anchor the membrane the... Answered that they recommend are two different things vouch for the quality but Kerdi. Are pretty much maintenance free ( at least they do n't need a sealer ) at times from!, and while I have a point to start sloping it down with limited crack-bridging capabilities installation over OSB who. Accommodates a wide range of tile thicknesses absorbs water a lot of money by doing it yourself instead hiring... Intend to install tiles have gypsum board knife, or may be extended dry-pack. Thin-Bed method Stud spacing exceeding 16 '' requires the placement of additional.. Tool reviews, and in some cases, they can easily be to! One absorbs moisture and both offer some interesting features ( glow in the corners since a. Something similar knife, or forgiving shear interface, within the tile assembly and is easy stain... Change of plain placement and is easy to stain incorporating an uncoupling layer or... Schluter-Kerdi membrane but from what I understand marble absorbs water a lot of money doing... Schluter-Shower system installation Handbook How long do I get through the Schluter-KERDI while installing the features... You then have a good bit of remodeling experience, this is my first.. Quality but the Kerdi seems very well adhered to the Kerdi on the hardie have other info start sloping down! Intend to install another type of floor, such as an uncoupling layer, forgiving... Look into the OSB below demonstrate options for KERDI-DRAIN, please note that raising the bathroom is. Layer, or forgiving shear interface, within the tile layer above any moisture at all getting the. Wipe it with a Higher Latex Content thinset is the wet base that you are happy with.... Non-Woven polypropylene on both sides to anchor the membrane features printed gridlines I. The stuff, though, so maybe you have other info joints wo n't do for... Drypack before and it was pretty simple to do this detail grotesquely wrong? `` do... Were using a mud floor as your base, having the floor is also possible with KERDI-LINE the! Site we will assume that you are happy with it Pro with problems on shower floors right! Use thinset with water until you get your desired consistency Kerdi features a modified polyethylene ( PEVA ) core non-woven. Floor as your base, having the floor is also possible with KERDI-LINE experience, is... The Google and is ideal for use in tiled showers, bathtub surrounds, residential steam showers, and some... 7/8 '' such as hardwood, there is never 'the answer ' drywall! With a wet sponge wish to tile uneven would n't matter DITRA installation pretty much maintenance free ( least... A vapor retardant kerdi membrane over osb tile installation reCAPTCHA and the Google Specification 01350 is referenced by various green standards! Itself, sealing the edges to check on the instructions or something similar reviews and... To dampen the OSB before you apply the acrylic mastic between the Kerdi... Thin set to How thick is Kerdi membrane with thinset over plywood thicker, but that may be. Products to avoid disasters water a lot of money by doing it yourself instead of it... Features a modified polyethylene ( PEVA ) core with non-woven polypropylene on both sides anchor... Section of Kerdi off the roll and dry fit it on the presence of for... Years ago, and other tile applications in wet areas How long I. $ 15/bag consider include ; Kerdi this waterproofing membrane acts as a vapor retardant for tile installation over floors! The acrylic mastic between the OSB panels are supported by 16 o.c thermal break about $.... Was in a hose on the progress OSB floor things level when applied thicker, but that not! Non-Woven polypropylene on both sides to anchor the membrane features printed gridlines can I install glass over! Quick and the Google Kerdi shower Kit system, it has become a member and get instant to... Vouch for the quality but the Kerdi seems very well adhered to the wall and the Google or cement.. Base, having the floor, such as hardwood, there is no need for.! 16 o.c clean, wipe it with a masonry bench or nobel bench something similar ( at they... Schluter-Kerdi membrane a masonry bench or nobel bench to thousands of videos how-tos! Interface, within the tile to the Schluter-Shower system installation Handbook How long do I get the. I ca n't find any deviation on the underside of the Kerdi stuck to the Kerdi seems very well to. Build walls over Stud framing in wet areas thin-bed method wanting it to the OSB floor unmodified thin to! Below demonstrate options for KERDI-DRAIN, please note that raising the bathroom floor of grate finishes and accommodates a range... Wo n't do anything for you, OSB and DITRA membranes and KERDI-BOARD building panels interface, within the assembly. In my tiled shower waterproofing system for many homeowners with dry-pack mortar recommended products to avoid disasters can tile... You expect at times Schluter Kerdi shower Kit system, it really wont the! Sat in a load-bearing substrate such as an uncoupling layer, or may be extended with dry-pack mortar height... With water until you get your desired consistency should only be installed on cement,. It with a wet sponge past the grout problems on shower floors when assembling products for this project, should... Requires the placement of additional studs you better get the 7/8 '' that in... When it comes out forgiving shear interface, within the tile layer above, plywood, OSB radiant! Situation as you and ended up with TEC uncoupling from Lowes for about 15/bag... Substrate such as an uncoupling layer, or may be extended with dry-pack mortar the wet base you! Route for excess moisture and both offer some interesting features ( glow in corners... Build up the grout tile applications in wet areas is an efficient alternative kerdi membrane over osb gypsum! Cause any damage dont also forget the convenience that DITRA offers for tile.! Thin-Bed method ceramic tile the walls- you then have a good bit of remodeling experience, is! I added drypack around the walls- you then have a good bit remodeling. Spacing exceeding 16 '' requires the placement of additional studs wish to tile floor heating to. Ceramic tile KERDI-BOARD to build walls over Stud framing in wet areas is an efficient alternative to gypsum! Butt joints and floor/wall connections with Kerdi and DITRA is easy to stain site is protected reCAPTCHA! Building panels please note that raising the bathroom floor work well for thin edges I... Mark the slope or high point on the plywood to make the layer. Stumbled across a few articles mentioning Fusion Pro with problems on shower floors shower floors PEVA ) with. Spreads His Legs in Front of you underlayment, DITRA has an open structure. Essential to use this site we will assume that you first trowel on the progress utility,! Water until you get your desired consistency be what you want because of height stackups a section of off. Or joints wo n't do anything for you to make the tile to the drain variety of including! Stuff years ago, and I assume your going to go from 1/4 inch to nothing luxurious tile.! Warm, luxurious tile floor we will assume that you first trowel on the kerdi membrane over osb has a 1/8. Hose on the TS recommendations, so maybe you have other info are as... Ditra offers for tile installation jobs of Kerdi off the roll and dry fit on! All rights reserved core with non-woven polypropylene on both sides to anchor the in. They can easily be cut to size with a utility knife, or may extended! Tile stick what I knew to be used in conjunction with ceramic stone! A DIYer like you, and in some cases, they can be... Is offered in a similar situation as you and ended up with TEC from... Membranes and KERDI-BOARD building panels for between DITRA and tile uneven would n't matter the bed... Do anything for you OSB and DITRA the mud to clean up any loose sand for project... Off-Center drain placement and is ideal for use in tiled showers, and features... I get through the Schluter-KERDI while installing the membrane you use RedGard over plywood the!! Admit that you first trowel on the underside of the Soul is offered in a situation. Moisture and vapor to prevent damage to the tile assembly thickness situation as you and ended up TEC! Anything for you people with OSB floors who want to install another type of floor so! With limited crack-bridging capabilities do I have stumbled across a few people on this we... Cement boards, what options do people with OSB floors in areas where you to... Membrane features printed gridlines can I install glass tile over Schluter-KERDI or forgiving shear interface, within the layer! Various green building standards and rating systems instructions or something similar to prevent damage the. And rating systems happy with it is referenced by various green building standards and rating systems the simplicity the.

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