The KERDI-SHOWER-TS features an off-center drain placement and is 1-1/2" (38 mm) high. In a perfect job, it will waterproof. And, I am not against trying something new. How do I know if the thin-set mortar is modified or unmodified? Use this membrane with the tile thin-set, then place the tiles on the adhesive. The simple answer is yes. Not good. Thanks BobI had seen the problem with the shorter pre pitch sticks solved by shimming them up with mud until level with the long outside oneswas gonna do that any suggestion on another method?maybe I'll shim em up with extra lath now that I know need that in there? 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. The substrate must be clean, even, and load bearing. It consists of stopping What is the proper thin-set mortar consistency for installation of Schluter-KERDI/-KERDI-DS? Please note that the JLC forums are now displayed read-only. Bring all of these elements together using the profiles and fasteners specifically designed for KERDI-BOARD assemblies. Once it starts to get stiff, it will go off quickly. Is there a product you would recommend? Its excellent for tile installation, and the best part is that it is a liquid-applied waterproofing membrane. The 10-in. If you look at the recommended tile substrates, you will not find OSB anywhere on that list. Most of the others can only be applied to a feather edge over concrete or a suitable backer boardi.e., not over a subfloor. No gypsum levelers ! Technically, they're spec'ed at full strength in 28-days, but actually continue to get stronger after that as well. However if installed on drywall it is only protecting one side. I would not use a liquid membrane over a Kerdi tray. Free-space on the underside of the matting provides a route for excess moisture and vapor to prevent damage to the tile layer above. 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. It's pretty easy to resize pics with this utility. Invictus, by Henley. 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. Since you're using a tray, I think you better get the 7/8". Holes can typically be repaired by installing a patch of KERDI or Schluter-KERDI-BAND with What is a water test? Profile that forms a splashguard in curbless showers. 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. How Do I Get Through The Dark Night Of The Soul? Ditra is 1/8-in thick and is designed for ceramic and stone tile. The Kerdi system is installed using thin-set mortar. 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. Thats because the thinset, once applied, cures very quickly. For instance, you may be wondering will DITRA raise theheightof the OSB floor? I knew better than to start another thread! The time between liquid and starting to set can be quite abrupt. 5 When to use Kerdi band after mortar installation? Schluter manufactures their own, but says that any unmodified thin-set mortar will work. Tiles can be installed directly on KERDI using the thin-bed method. How thick is Kerdi membrane with thinset? Hi Danny. Thinset is the wet base that you first trowel on the plywood to make the tile stick. Henry makes one called liquid backerboard that is designed to get to a feather edge over OSB or ply (I'm sure on ply, double-check over OSB). 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. Provides uncoupling, waterproofing, vapor management and heavy load distribution. 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. 2023 The Taunton Press, Inc. All rights reserved. I will look into it. If you continue to use this site we will assume that you are happy with it. The thin-set mortar used for bonding KERDI must be appropriate for the substrate, and it must penetrate and engage the KERDI fleece. bags at Lowe's that you can get for less than the cost of a 50lb bag. Cut a section of Kerdi off the roll and dry fit it on the hardie. How do I perform one on the Schluter-Shower System? Is this going to be a mud job? Tile will go over the kerdi. I would prefer to seal the KBRS corner seat with Kerdi. 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? Kerdi eliminates water damage which can lead to mold and mildew. With a tray, it has to be perfectly flat and level. This seems to contradict what I I think I was looking for someone to verify what I knew to be the answerha ha. Almost like a hydraulic cement. Keep in mind the work clear is different for various brands, some are opaque and some are actually clear. 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. 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! Does unmodified thinset stick to plywood? Custom's Flexbond (highly modified) would not be as good, too much need for drying in an unventilated space.Bill. KERDI-DRAIN features an integrated bonding flange to which the KERDI waterproofing membrane is adhered and forms a waterproof connection at the top of the tile assembly. They can even be used with heated floors, and in some cases, they can be installed on top of vinyl flooring. Sorted by: 4. Please call Schluter-Systems Can I install Schluter-KERDI over drywall in my tiled shower? I have stumbled across a few articles mentioning Fusion Pro with problems on shower floors. If you achieve a consistent thickness with the modified thinset mortar, you dont have to worry about it being sucked up by OSB. Danny, download Irfanview (http://www.irfanview.com/), a free image viewer/editor. Schluter-KERDI is a pliable, sheet-applied, bonded waterproof membrane and vapor retarder with limited crack-bridging capabilities. I installed my Schluter-KERDI membrane yesterday. DITRA-XL is 5/16 (7 mm)-thick and allows for ceramic tile application over single layer plywood/OSB subfloors on joists spaced at 24 (610 mm) o.c. There are different types of OSB, from OSB1 to OSB3. I asked Schluter support about type of thinset under Kerdi shower tray to be installed over OSB. In general, modified thin-set mortar is not recommended to set ceramic and stone tile, including large format tiles, over the KERDI membrane. I'd also consider leaving the stuff outside in the garage (as long as it was above freezing) before mixing it up. 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. Tile is installed over DITRA using the thin-bed method in such a way that the mortar becomes mechanically anchored in the square, cutback cavities of the matting. Does Schluter-KERDI waterproofing membrane have a front/back to it? 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. 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. Then fill in the rest and slope it to the drain. J. Buck used unmodified ts to put it down with no problems, though the substrate might have been different. 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. Wont DITRA Raise the Height of the OSB Floor? Some types do not work well for thin edges and I assume your going to go from 1/4 inch to nothing. Not so good side to side. I need to get rid of the old trap and cap off then tie in a new trap. 3 Can I use unmodified thinset on plywood? About 1/4" off with a 6 ft. Level. 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. This movement is what causes the tiles and grout to crack. Its essential to use the recommended products to avoid disasters. However, Im using Kerdi membrane instead of Showerseal coating. The KERDI-SHOWER-TS features an off-center drain "I am the master of my fate, I am the captain of my soul." Hi Bill,That's right, John Bridge uses LIGHTLY modified thinset under Schluter's membrane products. Ouch. This seems to contradict what I have read but ok. Unmodified thin-set mortar is recommended to set ceramic and stone tile, including large format tiles, over the KERDI membrane. 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? How long does Kerdi have to dry? I am nearing completion of my tile shower project. 7. It looks like the big orange store up the street carries Henry 549 feather finish. Thanks Kevin. 3. When you set the curb, try to get a little slope into the shower with it. Because of the benefits mentioned above, DITRA is perfect for surfaces about to be tiled over. You can use a vacuum for that job. 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. Although some substrates absolutely require uncoupling membranes, they can be installed on a range of surfaces, including cement mortar, backerboard, OSB, and plywood. Yes,Kerdi can be installed on drywall or cement board. Thin-set mortar takes time to cure. 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. 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