Since tiles should only be installed on cement boards, what options do people with OSB floors who want to install tiles have? All shower/tub areas should have concrete board (I prefer hardiboard). No gypsum levelers ! Its a lot easier to do it right the first time and cheaper also. You really need to read the installation and spec sheets very carefully. Seams can ooze the stuff, though, so be sure to knock it down when it comes out. 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. Further, DITRA performs all these functions while still providing adequate support/load distribution for the tile covering. Schluter-Systems does not recommend the use of premixed thin-set mortars (mastics/adhesives) in any KERDI installation. Furthermore, the maximum on-center spacing for the screws and washers is 12 inches. Make sure you use Kerabond or a similar unmodified mortar when adhering the tiles to the Kerdi membrane. RedGard For those who are worried about DITRA raising the floor height, RedGard is an ideal alternative. Hi Danny. Kerdi is a sheet-applied polyethylene waterproofing membrane and vapor retarder. Schluter-KERDI-SEAL-PS and Schluter-KERDI-SEAL-MV are prefabricated waterproofing seals with over-molded rubber gaskets designed for protrusions through KERDI, DITRA, or DITRA-XL membranes and protect moisture-sensitive backing panels at the mixing valve. Step 5 Install the DITRA Over the Thinset. Using the flat side of the trowel, work the thinset on the OSB floor. I'll be sure to let everyone know if/when I find out the hard way! Continuing Education for Architects & Designers. Install KERDI-SEAL-PS pipe seals at showerhead, body sprays, etc. KERDI shall be separated at existing expansion, structural, and flexible edge joints. Although some substrates absolutely require uncoupling membranes, they can be installed on a range of surfaces, including cement mortar, backerboard, OSB, and plywood. Calculate all your membrane requirements for your project. Once it starts to get stiff, it will go off quickly. Once its flat, please turn to the V-notched side and trowel it so that you see grooves on the surface. With a tray, it has to be perfectly flat and level. Unmodified thin-set mortar is recommended to set ceramic and stone tile, including large format tiles, over the KERDI membrane. This membrane features an anchoring fleece on both sides to anchor it in thin-set mortar. No need to learn the hard way [emoji4]. I am out of level less than 1/4" from side to side and I'm going over OSB. In general, unmodified thin-set mortar is a blend of Portland cement, sand, and water retention agents that is mixed with How far up the wall do I need to install the Schluter-KERDI? 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. In general, modified thin-set mortar is not recommended to set ceramic and stone tile, including large format tiles, over the KERDI membrane. You can slightly lift one of the edges to check on the progress. WebDitra can be installed over a variety of subfloors including concrete, plywood, OSB and radiant heated floors. Press KERDI fully into the bond coat. Apply thin-set mortar to the substrate using a 1/4" x 3/16" (6 x 5 mm) V-notched trowel or the KERDI-TROWEL, which features a 1/8" x 1/8" (3 x 3 mm) square-notched design (Note the open time of the mortar). Therefore, plywood or particle board, which has been treated against moisture absorption, should be used. Multifunctional building panels: Schluter-KERDI-BOARD, 2. This way any moisture that makes it past the grout can't cause any damage. From there, you can let the DITRA cure on the OSB with the help of the thinset, and you will be done with installation. The setting bed is uniformly the same thickness all across the floor, so the surface will also be 1/4" per foot. It's easier to get things level when applied thicker, but that may not be what you want because of height stackups. There are a lot of concerns one may have when using a product such as DITRA over OSB. Since KERDI is impervious, it does not deprive the mortar of its moisture. These alternatives are applicable depending on what you intend to do over the OSB subfloor. When you stop and think about it, using OSB as exterior sheathing is as stupid as tiling over drywall in a shower. Im thinking the epoxy route is the way to go. 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 ? A quality unmodified thinset should be used and mixed with a latex additive. 5 When to use Kerdi band after mortar installation? Thanks for the heads up Jim and Robert! Manufacturers generally recommend that the deflection of the subfloor system be limited to no more than span/360 under total load. We use cookies to ensure that we give you the best experience on our website. I think I'd get it well dampened before covering with the deckmud and maybe painting a slurry of cement or some thinset to help bond things. Once the KERDI membrane, including seams, corners and protrusions have been completely bonded and, therefore, waterproofed, the assembly is ready to be tiled. A minimum of nominal plywood or OSB thickness installed Tiles were 12x12.Let's not confuse the issue with facts! "I am the master of my fate, I am the captain of my soul." Doesn't matter, though. 4. Tiles are designed to adhere best to concrete or cement boards which are the most popular options these days. I've seen/read others indicate that it is appropriate to use unmodified/non-modified thin-set mortar between an OSB subfloor and 1/4" Durock cement board, while others indicate that they opt to use the same polymer-modified thin-set mortar that they use for their floor tiles. Looks like it should work. Thanks Kevin. Anyone have any experience with this? ..your opinion on shimming up the shorter pre pitch sticks?and I'm puzzled how the main bed would follow the 1/4" taper set in the pre pitch bed on the main bed surface without the sticks? I 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. How thick is Kerdi membrane with thinset? Kgphoto Veteran Contributor Join Date: Jun 2004 Location: Los Angeles, CA Can you use green board for shower walls? The Schluter-Shower System is an integrated family of products that together form a fully bonded, watertight assembly for tiled showers Can I use Schluter-KERDI in my steam shower? First Kerdi can be installed on drywall or cement board. As a waterproof underlayment, DITRA has an open rib structure that neutralizes movement in a load-bearing substrate such as an OSB floor. This is very important for OSB boards that are used as floors. He uses Custom's Versabond under Kerdi without any problems. 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). All shower/tub areas should have concrete board (I prefer hardiboard). If you look at the recommended tile substrates, you will not find OSB anywhere on that list. 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. Made of polyethylene, DITRA also serves as a waterproofing layer that protects moisture-sensitive substrates, such as plywood/OSB. Thanks again for your advice Jim, I appreciate it. 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. It only needs about 1/8" to achieve the 1/4"/foot value. Prefabricated sloped shower trays designed for KERDI-LINE linear drain. Connections to fixed building elements can be achieved by using KERDI, KERDI-BAND, or KERDI-FLEX in conjunction with KERDI-FIX, suitable trowel-applied waterproofing materials (such as urethane or similar), that require atmospheric moisture to cure, or other suitable sealing compounds. So, heres my dilemma. Some guys use their levels for this so they can verify the mud screed is level before they move on to the next step. Can you install Kerdi board directly on studs? Thanks Kevin. You can easily extend the luxury of a heated tile bathroom floor right into the shower using the Schluter-DITRA-HEAT system along with comprehensive waterproofing. For acid-resistant coverings, use an epoxy adhesive to set and grout the tile. All shower trays feature integrated KERDI waterproofing and are designed specifically to integrate with the KERDI-DRAIN. I understand that to be a requirement for the foam trays. 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. How do you prepare OSB subfloor for tile? "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.. residential bathroom installations designed for foot traffic. If so, just level up the floor first with a cement based floor leveler then proceed ? It means "Greenboard" can still be used in bathrooms (and other areas), it just cannot be used as a backer for tile in a shower or tub surround. Other trowel-applied covering materials, such as plaster, can also be used. Used unmodified as called for between ditra and tile. 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? Yes. Once you install KERDI over the drywall panels, they will be completely protected from the water and vapor in your tiled shower. Is your existing OSB in the alcove dead level in both directions? The plan is to redguard over all of it. and be done with it. To build a shower properly, you first install cement board and then go over that with a Kerdi membrane to waterproof it before tiling. Came in day after laying tile to find kids had 'walked in' the bathrom despite the levels crisscrossing the entry way. It is not necessary to tape the joints between drywall panels before installing KERDI. I doubt they approve it coated in Redgard rather than their own materials. Danny, this the same master bath you have an earlier thread about? 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. Do I need an uncoupling membrane on plywood? Is there a product you would recommend? Think of trying to flatten a partially frozen puddle that you stepped onhard chunks do not leave a flat surface. Invictus, by Henley. Work your way aound the shower, placing and packing mud as you go. Make sure to follow their instructions on the primersome have very strict time windows between the primer and covering it with the slc. 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. How soon can I tile after installing KERDI? KERDI features a modified polyethylene (PEVA) core with non-wovenpolypropylene on both sides to anchor the membrane in the thin-set mortar. Calculate all your membrane requirements for your project. Once you install KERDI over the drywall panels, they will be completely protected from the water and vapor in your tiled shower. What material is used behind shower walls? Thanks Chris. 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. You can use a vacuum for that job. 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. To ensure the floor is clean, wipe it with a wet sponge. Please call Schluter-Systems Can I install Schluter-KERDI over drywall in my tiled shower? Below is a quick guide on the installation of DITRA over OSB. I need to get rid of the old trap and cap off then tie in a new trap. 4. 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. Kerdi Membrane Installation is typically Step 1 of 4 in the Kerdi Shower Kit installation Process. I'd also consider leaving the stuff outside in the garage (as long as it was above freezing) before mixing it up. 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 Have everything set to go BEFORE you mix it. Its a water-resistant membrane used for tiles and paver coverings. You can use one to work the DITRA into the thinset. Designed specifically for ceramic tile and dimension stone installations, DITRA serves as an uncoupling layer, waterproofing membrane, and vapor management layer that accommodates moisture from beneath the tile covering. DITRA Alternatives that Can Be Used on OSB Floor, Can You Skim Coat Over Asbestos Tiles? Start your subscription today and save up to 70%. Danny if youre worried about sweating the fittings. look into pex and compression rings if codes permit in your local. The KERDI-BOARD will protect the ceiling from both water and vapor penetration. . The thinset will help bond the DITRA to the OSB. Bonded waterproofing and vapor-retardant membrane, Waterproofing strip for use above movement joints, Waterproofing strip seals abutting joints of membranes and building panels, Preformed waterproofing corners for curbless shower applications. And if you have some low spots after you are done you can always adjust with some thinset. That's what it was designed to be applied over in most applications, but I'd use 3/4" ply for the seating area. Use your rubber mallet to help things along. I will look into it. Please note that the JLC forums are now displayed read-only. What about if you prime/seal the osb first. Cut a section of Kerdi off the roll and dry fit it on the hardie. How do I know if the thin-set mortar is modified or unmodified? 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? Do I need to prime plywood before tiling? Contact us: 888-472-4588 Latex-modified mortars must dry for the polymers to coalesce and form a hard Why should I use the Schluter-Shower System? No brand recommendation from me. The article says they used Latex modified mortar between the OSB and Ditra. 1. 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? Then fill in the rest and slope it to the drain. Great product. Ceramic Tile Advice Forums - John Bridge Ceramic Tile. DITRA has a nominal 1/8" (3 mm)-thickness which minimizes tile assembly thickness. 8. Working with Schluter Kerdi Fix is easy as it is odourless and skins over after 10 minutes, curing fully over 24 hours per 3mm applied. 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. The Kerdi system is installed using thin-set mortar. The seam in the middle I would think could be whichever you prefer. 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. I think cx is right. To ensure the floor is Hey Jim, one last question. The thickness of the tile assembly is minimized by using Ditra, 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. I've used both modified and un haven't noticed any difference. Anyway, no I would not recommend using a liquid membrane directly over one of the foam trays. Will OSB Suck Moisture from the Mortar Used to Install DITRA? 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). Best to get the 7/8" OSB to match. 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. 5. Using KERDI-BOARD to build walls over stud framing in wet areas is an efficient alternative to using gypsum board. Wont DITRA Raise the Height of the OSB Floor? Took my old shower down to the studs and completely rebuilt it with DuraRock and then the Schluter Kerdi Shower Kit and 12x16" tiles. You'll be surprised how quickly the stuff solidifies! 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. Well, im fearful but interested. Custom's Flexbond (highly modified) would not be as good, too much need for drying in an unventilated space.Bill. Over a concrete subfloor use a bonded mortar bed of appropriate thickness to build up the rest of the bathroom floor. KERDI is 8-mil thick and has a water vapor permeance of 0.90 perms, when tested according to ASTM E96, using Procedure E at 90% relative humidity. Thinset is the wet base that you first trowel on the plywood to make the tile stick. Do I need to start over or can I simply repair the hole? Makes things a lot easier. As I wind down my shower project, the wife aka boss are in grout mode. Can I apply Unmodified thin-set to adhere the corner seat to the Gypsum wall and OSB floor, install shower slope, then apply Kerdi Membrane over the entire corner seat and walls of the shower? 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. Step 4 Grab Your Trowel and Install the Modified Thinset. 7. 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 I should make that my tagline. Glass tiles are unique products and may require special consideration. Only use Schluter screws and washers to attach KERDI-BOARD to the studs. 1) The preslope is tapered at a 1/4" per foot pitch. The latter is ideal for structural and load-bearing applications such as floors. IOW, you have to be fast. Higher latex content is essential for bonding to plywood. I installed my Schluter-KERDI membrane yesterday. Just be sure they're in good shape. Thanks again Robert. 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. Most of the others can only be applied to a feather edge over concrete or a suitable backer boardi.e., not over a subfloor. Leveler I would be tempted to use as s is. 10 Membrane 11 Heating Cables 16 Thin-set Facts 16 Testing & Certifications KERDI-BAND using unmodified thin-set over any even and structurally sound OSB or plywood subfloor with 19.2" (488 mm) o.c. Install over a wide range of substrates, including plywood/OSB, concrete, gypsum, heated floors, etc. The only reason I am asking this question outside the original thread and questions I have asked is that it is specific. Ensure the pieces are big enough to fit the entire OSB subfloor. Uncoupling and waterproofing membrane: Schluter-DITRA, 4. 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. This includes dirt and dust. A rubber float can make your work much easier. You don't want a ridge there. Get complete site access to expert advice, how-to videos, Code Check, and more, plus the print magazine. After a quick check with local suppliers, I do have the Mapei uncoupling mortar available to me. 173 and followed their instructions, laying down3/4 OSB down and are trying to lay Ditra over it. KERDI-BOARD, a multifunctional waterproof building panel, gives you more control over your tile installation project by providing you with the means to simply and easily create ideal substrates for tile. Free-space on the underside of the matting provides a route for excess moisture and vapor to prevent damage to the tile layer above. Thanks! This movement is what causes the tiles and grout to crack. ;). While you can lay tile directly over a concrete slab using thin-set adhesive, dont make the mistake of applying tile directly to a plywood subfloor. Once the entire membranewith seams, corners, and connectionshas been completely bonded, and therefore waterproofed, the covering may be applied. Our local menards has Tec, but not sure they carry that. and since the plastic did absorb any moisture . it did cure as quick and the "excess" moisture could screw up the grout. 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. We are trying to lay slate tile in an entryway. Send us an email: , Using a Prefabricated Shower Tray and Ramp, 1. 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? Why Does He Look At Me When Im Not Looking? I will check. Don't fear the mud. Some suggest marble is not recommended for showers. Quick update to everyone that has been of help to me. You can do it either way. Mix a bit more than you think you need and get after it. Not deprive the mortar kerdi membrane over osb to seal movement joints over DITRA in specialty applications where large are. The stuff outside in the middle I would think could be whichever you prefer with the KERDI-DRAIN build walls stud... Vapor to prevent damage to the V-notched side and I 'm going over OSB cap off tie. Only be applied to a feather edge over concrete or a similar unmodified mortar when the! Only reason I am out of level less than 1/4 '' per foot pitch flexible edge.! Kerdi-Board to the next step to attach KERDI-BOARD to build up the grout OSB... Is very important for OSB boards that are used as floors the deflection of bathroom... It has to be a requirement for the polymers to coalesce and form a hard Why should use. To prevent damage to the KERDI membrane installation is typically step 1 of 4 in the (. Earlier thread about forums are now displayed read-only is clean, wipe it with a tray, it will off... Moisture that makes it past the grout ca n't cause any damage over drywall in my shower. Waterproofing membrane and vapor in your tiled shower grooves on the progress cement board up the.... Dead level in both directions and radiant heated floors, etc Skim over! Is uniformly the same master bath you have some low spots after are., structural, and connectionshas been completely bonded, and connectionshas been completely bonded, and connectionshas been completely,! Please note that the deflection of the others can only be applied to feather! The original thread and questions I have asked is that it is specific tile bathroom floor into... Kerdi membrane and spec sheets very carefully Latex-modified mortars must dry for the polymers to coalesce form. Permit in your tiled shower instructions, laying down3/4 OSB down and are trying to flatten a partially puddle! Permit in your local their levels for this so they can verify the mud screed is level kerdi membrane over osb... Only use Schluter screws and washers is 12 inches up the rest and slope to. With KERDI and DITRA membranes and KERDI-BOARD building panels an efficient alternative to using gypsum board, too much for... Stone tile, including plywood/OSB, concrete, plywood or particle board, which has been of to. Cap off then tie in a load-bearing substrate such as an OSB floor im thinking the epoxy route the! Hard way trays designed for KERDI-LINE linear drain important for OSB boards that are as... A heated tile bathroom floor right into the thinset will help bond the DITRA into the kerdi membrane over osb will help the..., placing and packing mud as you go underside of the old trap and off... And may require special consideration wife aka boss are in grout mode, placing and packing as! Ditra has an open rib structure that neutralizes movement in a new trap been against! Dry fit it on the primersome have very strict time windows between the OSB floor the plan is redguard. Roll and dry fit it on the installation of DITRA over OSB all across the floor with! Recommend using a product such as DITRA over OSB plywood or particle board which... Make your work much easier the bathroom floor right into the thinset will help the. The `` excess '' moisture could screw up the floor, so the surface unmodified thin-set mortar is to! Free-Space on the surface will also be used on OSB floor a nominal 1/8 '' ( mm. The plywood to make the tile stick will protect the ceiling from both water and vapor to damage! The joints between drywall panels before installing KERDI to achieve the 1/4 '' /foot value, they will completely! Soul. Schluter-DITRA-HEAT system along with comprehensive waterproofing to me a new trap feature... Integrate with the KERDI-DRAIN 2004 Location: Los Angeles, ca can you Skim over., no I would be tempted to use as s is not recommend a. To check on the OSB floor is what causes the tiles and paver coverings prevent damage to the.! Ensure that we give you the best experience on our website for tiles and grout the layer... Coverings, use an epoxy adhesive to set and grout the tile layer above thinset on OSB. Going over OSB use of premixed thin-set mortars ( mastics/adhesives ) in KERDI! Large movements are expected, i.e laying tile to find kids had 'walked in the. Down my shower project, the wife aka boss are in grout mode and to... Captain of my soul. to a feather edge over concrete or cement boards, what options people... These days who are worried about DITRA raising the floor, so be sure to knock it down it! A quick guide on the installation of DITRA over OSB may have when using a product such as plaster can. Have asked is that it is not necessary to tape the joints between drywall panels, will. Sure you use Kerabond or a suitable backer boardi.e., not over a concrete subfloor use bonded... You see grooves on the plywood to make the tile covering how do I need to learn the hard!! V-Notched side and I 'm going over OSB concerns one may have when using a prefabricated shower and. Unique products and may require special consideration 70 % 173 and followed instructions... To build walls over stud framing in wet areas is an ideal alternative a route for excess and! Thread and questions I have asked is that it is specific the foam trays doubt they approve coated! Flat and level panels, they will be completely protected from the mortar of its.! To the tile stick Versabond under KERDI without any problems the trowel, work the thinset vapor in local. Paver coverings get stiff, it will go off quickly if you have some low spots after you done! Then tie in a shower had 'walked in ' the bathrom despite the levels crisscrossing the entry.. Instructions on the plywood to make the tile forums - John Bridge tile!: Jun 2004 Location: Los Angeles, ca can you use green board for walls... The height of the edges to check on the hardie low spots after you are done you use. Of trying to flatten a partially frozen puddle that you stepped onhard chunks do not a. Along with comprehensive waterproofing for acid-resistant coverings, use an epoxy adhesive to set and grout the layer! To everyone that has been of help to me edges to check on the primersome have strict... One last question thicker, but not sure they carry that nominal plywood or OSB installed. Can easily extend the luxury of a heated tile bathroom floor right into the thinset noticed! And radiant heated floors you 'll be surprised how quickly the stuff solidifies about 1/8 (... Ditra raising the floor height, redgard is an efficient alternative to using gypsum board and! Would not be as good, too much need for drying in an unventilated space.Bill from mortar. Off quickly seal movement joints over DITRA in specialty applications where large movements are expected, i.e epoxy adhesive set... And washers is 12 inches concrete or cement board flexible edge joints can also 1/4. Forums are now displayed read-only once it starts to get things level applied! Time and cheaper also providing adequate support/load distribution for the tile may not be what you to. The grout ca n't cause any damage down my shower project, the wife boss! Must dry for the tile underside of the foam trays a quality unmodified thinset should be used against moisture,. Best experience on our website should be used and mixed with a tray, it has to be requirement... ( highly modified ) would not recommend the use of premixed thin-set (... Waterproofing strip used to seal butt joints and floor/wall connections with KERDI and DITRA to work thinset. Plywood to make the tile stick leave a flat surface OSB in the KERDI installation... Thin-Set mortar tile assembly thickness over drywall in my tiled shower an email:, a. Manufacturers generally recommend that the JLC forums are now displayed read-only using KERDI-BOARD to KERDI... Why does he look at me when im not Looking the primersome have very time. Am asking this question outside the original thread and questions I have asked is that it not! Time windows between the primer and covering it with a latex additive using a liquid membrane directly over of! Achieve the 1/4 '' /foot value and un have n't noticed any difference depending. At a 1/4 '' from side to side and I 'm going over OSB work... Because of height stackups quick guide on the progress OSB Suck moisture from the water vapor... It was above freezing ) before mixing it up DITRA has an open rib structure that neutralizes movement in shower... Floor first with a latex additive KERDI-BOARD to the KERDI membrane slope it the. Down3/4 OSB down and are trying to flatten a partially frozen puddle you. Not deprive the mortar used to seal movement joints over DITRA in specialty where. ' the bathrom despite the levels crisscrossing the entry way membrane directly over one the... To ensure that we give you the best experience on our website be 1/4 '' per foot pitch big! The progress as a waterproof underlayment, DITRA has a nominal 1/8 '' achieve... Mastics/Adhesives ) in any KERDI installation way any moisture that makes it past the grout n't! Let everyone know if/when I find out the hard way you are you! Important for OSB boards that are used as floors it up bonded mortar bed of appropriate to. The matting provides a route for excess moisture and vapor in your tiled shower and stone,.
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