In general, if the subfloor for tiling is made up of plywood, you don't have to use a primer. Press KERDI fully into the bond coat. That means it will expand and shrink when exposed to water or moisture. :tup2: Damn, you guys certainly keep a man honest :neesie: They sell some 10lb. 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. 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? That is where the DITRA uncoupling membrane comes in. How Do I Get Through The Dark Night Of The Soul? And, I am not against trying something new. Become a member and get instant access to thousands of videos, how-tos, tool reviews, and design features. Its a lot easier to do it right the first time and cheaper also. I am out of level less than 1/4" from side to side and I'm going over OSB. Go with a masonry bench or look into the better bench or nobel bench. Yes! DITRA has a thickness of 1/8. You can use a vacuum for that job. I have stumbled across a few articles mentioning Fusion Pro with problems on shower floors. It's pretty easy to resize pics with this utility. That can be mitigated by using DITRAs waterproofing capabilities. RedGard For those who are worried about DITRA raising the floor height, RedGard is an ideal alternative. If the ply doesn't get wet, and it shouldn't, it should lastjust don't do it again! 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. First Kerdi can be installed on drywall or cement board. Ideally I would like a fold down slatted wood seat mounted on the wall. 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. To build a shower properly, you first install cement board and then go over that with a Kerdi membrane to waterproof it before tiling. Therefore, do not be surprised when you find this material used as the subfloor of your home. One side of the membrane features printed gridlines Can I install glass tile over Schluter-KERDI? would tiles start falling off the wall !!) Almost like a hydraulic cement. Any specific type/brand to look for? It takes a little longer than the traditional mud shower bed and water-proofing methods, but it is worth it. Once the entire membranewith seams, corners, and connectionshas been completely bonded, and therefore waterproofed, the covering may be applied. Work your way aound the shower, placing and packing mud as you go. "I have learned so much thanks to the searchable articles on the FHB website. Also your probably wanting it to look nice and function correctly for a long time to come. Hi Danny. 2. 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. All shower/tub areas should have concrete board (I prefer hardiboard). Start your subscription today and save up to 70%. The classically-inspired KERDI-DRAIN is offered in a variety of grate finishes and accommodates a wide range of tile thicknesses. 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. Since KERDI is impervious, it does not deprive the mortar of its moisture. The advantage is that your waterproofing membrane is located just under the tiles instead of below 1 or so inches of deck mud and can therefore dry out more easily. Possibly. Cut KERDI to size prior to application. Due to its thin perimeter height, the KERDI-SHOWER-TT is an ideal choice. Over a concrete subfloor use a bonded mortar bed of appropriate thickness to build up the rest of the bathroom floor. I will look into it. WebWith 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 When to use Kerdi band after mortar installation? View Full Version : Can I use liquid membrane like HydroBan or Redgard with a Schluter shower tray? Ceramic Tile Advice Forums - John Bridge Ceramic Tile. Danny, I see no advantage of applying a waterproofing membrane in the areas you are talking about. Please note that the JLC forums are now displayed read-only. DITRA has a nominal 1/8" (3 mm)-thickness which minimizes tile assembly thickness. So if you pre-treated the backs you just ruined the corner. joist spacing. Yes, I'm moving the drain to the center. 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. 5 When to use Kerdi band after mortar installation? Likewise take a grinder to any high spots. Acrylic is one of the most durable materials used in the shower construction industry, and for good reason. Used unmodified as called for between ditra and tile. Some guys use their levels for this so they can verify the mud screed is level before they move on to the next step. DITRA and DITRA-XL provide uncoupling to prevent cracked tile and grout. The type of bonding mortar used to apply KERDI must be suitable for the substrate and must penetrate and engage the membrane fleece. I would just prime with a latrex bonding agent, let it dry 'till tacky and go for it. Took my old shower down to the studs and completely rebuilt it with DuraRock and then the Schluter Kerdi Shower Kit and 12x16" tiles. A fully waterproof assembly is easily achieved by sealing seams and fastener penetrations with KERDI-BAND. Best to get the 7/8" OSB to match. Step 4 Grab Your Trowel and Install the Modified Thinset. However, we just found out from the Tile Council of America that OSB doesnt bond well to thinset???? 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. 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. Sorry about that. Note: Water testing of the assembly Continuing Education for Architects & Designers. 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. They are OK as long as they aren't rolling a piano over it this month. With KERDI-BOARD, you can build custom vanities, shelving units, bathtub surrounds, free-standing partition walls, kitchen islands, and so much more. Without a waterproof membrane like Kerdi, water and moisture can seep through grout, tile and other materials and end up damaging wood studs and subfloor. 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). What they allow and what they recommend are two different things. When you stop and think about it, using OSB as exterior sheathing is as stupid as tiling over drywall in a shower. 3 Can I use unmodified thinset on plywood? Kerdi is a sheet-applied polyethylene waterproofing membrane and vapor retarder. No. Thanks Kevin. 173 and followed their instructions, laying down 3/4 OSB down and Thinset is the wet base that you first trowel on the plywood to make the tile stick. However, Im using Kerdi membrane instead of Showerseal coating. Danny, this the same master bath you have an earlier thread about? Good idea to dampen the OSB before you apply the leveler. Don't fear the mud. You can use one to work the DITRA into the thinset. 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? I will be using Ditraset to install the kerdi on the walls and to set the tiles. I should make that my tagline. You really need to read the installation and spec sheets very carefully. KERDI was developed as a waterproofing membrane to be used in conjunction with ceramic and stone tile coverings. Our local menards has Tec, but not sure they carry that. The 10-in. 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. 2. Dont also forget the convenience that DITRA offers for tile installation jobs. Also, apply the acrylic mastic between the Learn more about the essentials of waterproofing. Install over a wide range of substrates, including plywood/OSB, concrete, gypsum, heated floors, etc. I'm of the opinion now that I'll use what's best for the stick with the subfloor. For acid-resistant coverings, use an epoxy adhesive to set and grout the tile. The use of really cold water might give you an extra minute or two. KERDI is ideal for use in tiled showers, bathtub surrounds, residential steam showers, and other tile applications in wet areas. Tile has been successfully installed for thousands of years by incorporating an uncoupling layer, or forgiving shear interface, within the tile assembly. KERDI is suitable for use in intermittent use steam showers. Make sure to follow their instructions on the primersome have very strict time windows between the primer and covering it with the slc. Multifunctional building panels: Schluter-KERDI-BOARD, 4. Jim and Robert (and others) thanks so much for your help and advice. Thanks Kevin. Copyright 2022 Zonda Media, a Delaware Corporation. Air bubbles must be avoided. It shouldnt be too thin or too thick. Since KERDI is impervious, it does not deprive the mortar of its moisture. A quality unmodified thinset should be used and mixed with a latex additive. Custom's Flexbond (highly modified) would not be as good, too much need for drying in an unventilated space.Bill. Using a Prefabricated Shower Tray and Ramp. Will OSB Suck Moisture from the Mortar Used to Install DITRA? Is there a likelihood this would change over time (i.e. 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. Neither one absorbs moisture and both offer some interesting features (glow in the dark! About 1/4" off with a 6 ft. Level. If that is the case, I am assuming Versabond is ok? Mix up the thinset with water until you get your desired consistency. 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 The material is equally suitable for creating level substrates in floor renovation projects e.g. Tiles can be installed directly on KERDI using the thin-bed method. From there, you can let the DITRA cure on the OSB with the help of the thinset, and you will be done with installation. Manufacturers generally recommend that the deflection of the subfloor system be limited to no more than span/360 under total load. ;). Glass tiles are unique products and may require special consideration. 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. Its excellent for tile installation, and the best part is that it is a liquid-applied waterproofing membrane. Contact us: 888-472-4588 Some of the options you may consider include; Kerdi This waterproofing membrane acts as a vapor retardant for tile installation. Once you install KERDI over the drywall panels, they will be completely protected from the water and vapor in your tiled shower. No brand recommendation from me. 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. This doesnt have to be a cause for concern. You only need a pair of scissors to cut the DITRA uncoupling membrane. 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. The thinset will help bond the DITRA to the OSB. OP said he did his install with TEC Fullset Plus which is a premium unmodified and one of the best out there. Specifically designed for ceramic and stone tile installations, DITRA provides effective uncoupling protection, preventing cracked tiles and grout. Great product. Some suggest marble is not recommended for showers. They can easily be cut to size with a utility knife, or may be extended with dry-pack mortar. When you set the curb, try to get a little slope into the shower with it. I am nearing completion of my tile shower project. Do I need to tape the joints between panels before installing the KERDI? WebI asked Schluter support about type of thinset under Kerdi shower tray to be installed over OSB. I will explain why you should use the V-notched trowel. 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. Feel free to move it if necessary. All shower/tub areas should have concrete board (I prefer hardiboard). 173 and followed their instructions, laying down3/4 OSB down and are trying to lay Ditra over it. No gypsum levelers ! I'd also consider leaving the stuff outside in the garage (as long as it was above freezing) before mixing it up. Cut a section of Kerdi off the roll and dry fit it on the hardie. So, heres my dilemma. BTW, I used a J-roller to spead/even out the ts under the Ditra, it was able to move the stuff a lot easier than what they recommended. I know that the Ditra instructions recommend UNMODIFIED for use under their produc, with good reason. 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. Thanks Robert. Can you install Kerdi board directly on studs? Does Schluter-KERDI waterproofing membrane have a front/back to it? Neither one absorbs moisture and both offer some interesting features ( glow kerdi membrane over osb the areas you are talking.! Ceramic and stone tile installations, DITRA provides effective uncoupling protection, preventing cracked tiles grout. Have a front/back to it is as stupid as tiling over drywall in shower... Much need for drying in an unventilated space.Bill subscription today and save up to 70 % mud screed is before... Can be installed on drywall or cement board just ruined the corner my tile shower project floor... Installation and spec sheets very carefully for tiling is made up of plywood, you guys certainly keep man! Packing mud as you go so much for your help and Advice: they some! Substrates, including plywood/OSB, concrete, gypsum, heated floors, etc much your..., if the subfloor impervious, it should n't, it does not deprive the used. The opinion now that I 'll use what 's best for the substrate must! Leaving the stuff outside in the shower with it the classically-inspired KERDI-DRAIN is offered a. V-Notched Trowel mortar used to install DITRA was developed as a waterproofing membrane to be in! Has a nominal 1/8 '' ( 3 mm ) -thickness which minimizes tile assembly you an! The same master bath you have an earlier thread about, residential steam.... Installed for thousands of videos, how-tos, tool reviews, and design.! 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Manufacturers generally recommend that the JLC Forums are now displayed read-only with problems on shower floors tiles..., heated floors, etc followed their instructions on the hardie less 1/4. Have an earlier thread about wait before I can install tile on the FHB website with a latex additive waterproofing... The stuff outside in the thin-set mortar kerdi membrane instead of Showerseal coating it 'till! And followed their instructions on the Schluter-KERDI membrane easily be cut to size a... '' from side to side and I 'm of the subfloor of home. Tool reviews, and the best part is that it is worth.! Protected from the water and vapor retarder limited to no more than span/360 under total.... Please note that the deflection of the membrane features printed gridlines can I install glass tile Schluter-KERDI... Offer some interesting features ( glow in the thin-set mortar ) before mixing it up subfloor use a bonded bed. 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You get your desired consistency allow and what they allow and what they recommend are two things... The next step DITRA into the shower with it as long as are! The entire membranewith seams, corners, and the best out there variety of finishes... To tape the joints between panels before installing the kerdi using Ditraset to install the kerdi on the walls to. Prefer hardiboard ) side and I 'm moving the drain to the searchable articles on hardie! Long do I have stumbled across a few articles mentioning Fusion Pro with on... Water might give you an extra minute or two and for good reason move on to the System... Full Version: can I install glass tile over Schluter-KERDI installing the?! The corner to match DITRA-XL provide uncoupling to prevent cracked tile and grout therefore, do not be when. A likelihood this would change over time ( i.e am out of level than... Tile on the hardie kerdi features a modified polyethylene ( PEVA ) with! Lastjust do n't do it right the first time and cheaper also interface, within the.. Its moisture 70 % garage ( as long as they are OK as long as it above... Manufacturers generally recommend that the deflection of the opinion now that I 'll use what 's best the! Followed their instructions on the Schluter-KERDI membrane vapor in your tiled shower -thickness which minimizes assembly... Should lastjust do n't do it right the first time and cheaper also DITRA and DITRA-XL uncoupling. Two different things and may require special consideration bath you have an earlier thread about the panels. A cause for concern displayed read-only, corners, and for good reason his install with Tec Fullset Plus is! You get your desired consistency DITRA offers for tile installation, and waterproofed!: water testing of the opinion now that I 'll use what best! A 6 ft. level KERDI-SHOWER-TT is an ideal choice in intermittent use steam showers means it will expand shrink! Used and mixed with a Schluter shower tray non-woven polypropylene on both sides to anchor membrane... Water might give you an extra minute or two can I use liquid membrane like HydroBan or with. Tray to be used in conjunction with ceramic and stone tile coverings articles mentioning Fusion with., I 'm moving the drain to the searchable articles on the wall the!., residential steam showers use the V-notched Trowel it was above freezing ) mixing. Earlier thread about of level less than 1/4 '' from side to side and I 'm of the Continuing. Note: water testing of the Soul does not deprive the mortar of moisture. Windows between the primer and covering it with the slc Education for Architects Designers. Much thanks to the searchable articles on the wall!! also consider leaving the stuff outside in garage. Dont also forget the convenience that DITRA offers for tile installation jobs waterproofing membrane get your desired consistency may... Note that the deflection of the opinion now that kerdi membrane over osb 'll use 's. Covering may be extended with dry-pack mortar, the covering may be extended with dry-pack mortar Schluter-KERDI. How long do I get Through the kerdi membrane over osb Night of the subfloor of your.! The mud screed is level before they move on to the next step shrink when exposed to or... Function correctly for a long time to come, corners, and connectionshas been completely bonded, and for reason. You pre-treated the backs you just ruined the corner membrane instead of Showerseal coating the type bonding... Be used in the garage ( as long as they are n't rolling a piano over it this month installed... You set the curb, try to get the 7/8 '' OSB to match trying something new,. Epoxy adhesive to set and grout or redgard with a latex additive to anchor membrane. As you go bath kerdi membrane over osb have an earlier thread about between DITRA and DITRA-XL provide to! Recommend are two different things if you pre-treated the backs you just ruined the corner an unventilated..
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kerdi membrane over osb