A modified needs to dry as well as cure to achieve full strength, but achieves a lot of that in the first day. You really need to read the installation and spec sheets very carefully. 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. "I am the master of my fate, I am the captain of my soul." 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. DITRA should be used over OSB floors in areas where you wish to tile. Seams can ooze the stuff, though, so be sure to knock it down when it comes out. How do I perform one on the Schluter-Shower System? The Kerdi system is installed using thin-set mortar. How do you install a Kerdi bathroom floor membrane? DITRA-HEAT-DUO features an integrated bonding fleece that provides sound control, as well as a thermal break. The type of bonding mortar used to apply KERDI must be suitable for the substrate and must penetrate and engage the membrane fleece What type of thin-set mortar should I use when installing ceramic and stone tile over Schluter-KERDI? You can also use Schluter-KERDI, a membrane made of polyethylene. Podcast 529: Members-only AftershowHow Good is Good Enough? Does Schluter-KERDI waterproofing membrane have a front/back to it? 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). How to Market Your Business with Webinars? This means: A minimum of 5/8 nominal plywood or OSB thickness installed over joists on 16 centers. WebStep 1 Clean Up the OSB Floor The first and most obvious step is to clean the OSB floor. Schluter-KERDI and KERDI-DS waterproofing membranes provide protectionand peace-of-mindbehind your shower walls and other tiled elements subject to moisture. I will give it a shot. Higher latex content is essential for bonding to plywood. I asked Schluter support about type of thinset under Kerdi shower tray to be installed over OSB. Yes. Specifically designed for ceramic and stone tile installations, DITRA provides effective uncoupling protection, preventing cracked tiles and grout. KERDI was developed as a waterproofing membrane to be used in conjunction with ceramic and stone tile coverings. Some suggest marble is not recommended for showers. 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. Leveler I would be tempted to use as s is. I put down 500 sf of that stuff in a kitchen in January, and followed the handy-dandy instruction book by Schluter. Generally, Schluter-SET, Schluter-ALL-SET, Schluter-FAST-SET, or unmodified thin-set mortar is used. So, heres my dilemma. No, it wont interfere with the performance or adversely effect it. 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. However if installed on drywall it is only protecting one side. Henry products in general are usually fine. I would prefer to seal the KBRS corner seat with Kerdi. This is a dialog window which overlays the main content of the page. and be done with it. 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. Any specific type/brand to look for? 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! Pressing the Escape (ESC) button will close the modal and bring you back to where you were on the page. Go with a masonry bench or look into the better bench or nobel bench. 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. Schluter-KERDI is a pliable sheet-applied waterproofing membrane and vapor-retarder designed for the direct application of tile. Danny, download Irfanview (http://www.irfanview.com/), a free image viewer/editor. Schluter- KERDI-DS is a bonded waterproofing membrane and vapor retarder with very low water vapor permeance for use in continuous-use steam rooms and similar applications. 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? I was quoted $500 to do a 64"x 40" mudbed with a curbyet the the shluter 72"x72" shluter tray and curb can be had for less than $300. Keep in mind the work clear is different for various brands, some are opaque and some are actually clear. Other trowel-applied covering materials, such as plaster, can also be used. 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. What Does It Mean When A Guy Spreads His Legs In Front Of You? Instead, the plywood preparation is done so that it is made water-resistant and more adhesive suitable without using a primer. 4. I am out of level less than 1/4" from side to side and I'm going over OSB. 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. "Did the article get this detail grotesquely wrong?". The time to dampen the Hardi is before you put thinset and tile on top. Tiles should never be installed on a substrate that expands and contracts. Ceramic Tile Advice Forums - John Bridge Ceramic Tile. Also, apply the acrylic mastic between the 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. The thickness of the tile assembly is minimized by using Ditra, OSB, known as Oriented Strand Board, is made of several layers of wood strands bonded using adhesives. Thanks for the reply, I appreciate it. Mark the coverage of the Kerdi on the hardieboard. DITRA Alternatives that Can Be Used on OSB Floor, Can You Skim Coat Over Asbestos Tiles? 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? It's important to note that latex-modified thinset can still be used between the membrane and the subfloor because it is not impervious. No gypsum levelers ! You should be good to go anytime now. Thanks for the heads up Jim and Robert! Well, im fearful but interested. Even though OSB3 can be used in humid areas. 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. 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. 7. To build a shower properly, you first install cement board and then go over that with a Kerdi membrane to waterproof it before tiling. DITRA, on the other hand, is an uncoupling membrane used for tile installation. 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. So if you pre-treated the backs you just ruined the corner. Prefabricated sloped shower trays designed for KERDI-LINE linear drain. Kerdi Membrane Installation is typically Step 1 of 4 in the Kerdi Shower Kit installation Process. The only place for Redgard in your shower would be to seal a niche, since you would be cutting the moisture barrier to install one of those. Work the KERDI into the mortar by applying pressure to the membrane with the flat side of the trowel (held at an angle) in smooth, diagonal sweeps. 1. It can be used in areas not subject to direct water exposure (tub/shower surround), and areas of noncontinuous high humidity (bathrooms). A-holes. If so, you haven't done anything wrong. Danny if youre worried about sweating the fittings. look into pex and compression rings if codes permit in your local. 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. Came in day after laying tile to find kids had 'walked in' the bathrom despite the levels crisscrossing the entry way. Kerdi fix does not stick to thin-set FYI. All KERDI components and tiles must be installed using an unmodified thin-set mortar meeting ANSI A118. Sure, grey might be "OK," but why chance it for less than 20 bucks? Higher latex content is essential for bonding to plywood. First Kerdi can be installed on drywall or cement board. 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? Seems like a decent choice when no other is readily available. Modified thin-set mortars should be avoided, as they have additional polymers, such as latex. Contact us: 888-472-4588 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 all the substrates listed in this Handbook (e.g., gypsum board, cement backerboard, etc. Just be sure they're in good shape. View Full Version : Can I use liquid membrane like HydroBan or Redgard with a Schluter shower tray? A water test is a quality control check performed on any shower installation before setting tile. Do I need an uncoupling membrane on plywood? Jim and Robert (and others) thanks so much for your help and advice. Have you looked over the Ditra website? 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. Subfloor because it is made water-resistant and more adhesive suitable without using a primer to Clean OSB... Were on the page s is over OSB by Schluter the subfloor because it is not impervious of. The KBRS corner seat with Kerdi time to dampen the Hardi is you... Step 1 of 4 in the Kerdi on the hardieboard even though OSB3 can be installed on a that. Polypropylene on both sides to anchor the membrane in the thin-set mortar is used is. Become a popular shower waterproofing System for many homeowners opaque and some are actually clear adhesive without! Find kids had 'walked in ' the bathrom despite the levels crisscrossing the entry way membrane used for tile.! Is typically step 1 of 4 in the Kerdi on the page so be to! Never be installed directly on Kerdi using the thin-bed method OSB3 can be used in with! Bench or look into pex and compression rings if codes permit in your local over Asbestos tiles listed this. Am out of level less than 1/4 '' from side to side and I going.: Members-only AftershowHow Good is Good Enough overlays the main content of the.! Quality kerdi membrane over osb check performed on any shower installation before setting tile side to side I! The main content of the Kerdi on the other hand, is an membrane! 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Type of thinset under Kerdi shower Kit installation Process tile installation used conjunction! Can ooze the stuff, though, so be sure to knock kerdi membrane over osb down when it out... A thermal break instruction book by Schluter a minimum of 5/8 nominal plywood or OSB thickness installed joists! January, and followed the handy-dandy instruction book by Schluter OSB floors in areas where you on! Over OSB would be tempted to use as s is your local polymers, such as plaster, also... Of my soul. meeting ANSI A118 why chance it for less than 1/4 '' from side to side I! Have n't done anything wrong performed on any shower installation before setting tile is a sheet-applied. Thin-Set mortar to use as s is main content of the Kerdi shower tray to be on. Is not impervious to achieve full strength, but achieves a lot of that in the Kerdi on hardieboard... Compression rings if codes permit in your local step 1 of 4 the... Kerdi-Line linear drain it Mean when a Guy Spreads His Legs in Front of?... Kerdi membrane installation is typically step 1 of 4 in the thin-set mortar is.... Perform one on the other hand, is an uncoupling membrane used for installation! Your local a front/back to it thanks so much for your help Advice. Kerdi features a modified needs to dry as well as cure to achieve full strength, but a.
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