But the good news is that it will only suck a little amount which wont affect the adhesion of DITRA or the OSB itself. 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. the Kerdi pan with the corner membranes. Thanks for the reply Robert. Took my old shower down to the studs and completely rebuilt it with DuraRock and then the Schluter Kerdi Shower Kit and 12x16" tiles. It is not necessary to tape the joints between drywall panels before installing KERDI. All shower trays feature integrated KERDI waterproofing and are designed specifically to integrate with the KERDI-DRAIN. Please call Schluter-Systems Can I install Schluter-KERDI over drywall in my tiled shower? Can you tile over Kerdi membrane? Once you get your pics to about 600 pixels high by 400 wide, they'll upload in a snap. Do I need to start over or can I simply repair the hole? If you can tile a shower you can do a mud bed. Tiles should never be installed on a substrate that expands and contracts. The seam in the middle I would think could be whichever you prefer. I'm good front to back (32" depth). Any specific type/brand to look for? Ouch. I'm a DIYer like you, and while I have a good bit of remodeling experience, this is my first bathroom. What material is used behind shower walls? Did the article get this detail grotesquely wrong? This means: A minimum of 5/8 nominal plywood or OSB thickness installed over joists on 16 centers. If you continue to use this site we will assume that you are happy with it. Then hang the sheet. They can even be used with heated floors, and in some cases, they can be installed on top of vinyl flooring. 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. Pressing the Escape (ESC) button will close the modal and bring you back to where you were on the page. He uses Custom's Versabond under Kerdi without any problems. Then I added drypack around the walls- you then have a point to start sloping it down. More recently, Laticrete Hydroban Board, and Johns Manville GoBoard have all come on the market. While the detail images below demonstrate options for KERDI-DRAIN, please note that raising the bathroom floor is also possible with KERDI-LINE. Good idea to dampen the OSB before you apply the leveler. I think cx is right. 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. If you try the epoxy, you might find a nice, flat surface and do that first before getting on the curb with it. Kerdi is a sheet-applied polyethylene waterproofing membrane and vapor retarder. Have everything set to go BEFORE you mix it. These alternatives are applicable depending on what you intend to do over the OSB subfloor. If the ply doesn't get wet, and it shouldn't, it should lastjust don't do it again! It's important to note that latex-modified thinset can still be used between the membrane and the subfloor because it is not impervious. 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. All shower/tub areas should have concrete board (I prefer hardiboard). OSB, though slightly different from plywood, it is still a wood product. 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. You can use one to work the DITRA into the thinset. Tile has been successfully installed for thousands of years by incorporating an uncoupling layer, or forgiving shear interface, within the tile assembly. Do I need to tape the joints between panels before installing the KERDI? The material is equally suitable for creating level substrates in floor renovation projects e.g. And if you have some low spots after you are done you can always adjust with some thinset. Schluter-KERDI and KERDI-DS waterproofing membranes provide protectionand peace-of-mindbehind your shower walls and other tiled elements subject to moisture. So, it is safe to install DITRA over OSB. I'll be sure to let everyone know if/when I find out the hard way! The plan is to redguard over all of it. Keep in mind he will apply thin-set and his Kerdi shower tray over the leveler. They can even be used with heated floors, and in some cases, they can be installed on top of vinyl flooring. You have a plastic moisture barrier behind the walls, and a PVC liner under the floor. You can now lay the DITRA over the thinset. Schluter-Systems does not recommend the use of premixed thin-set mortars (mastics/adhesives) in any KERDI installation. Does unmodified thinset stick to plywood? Furthermore, the maximum on-center spacing for the screws and washers is 12 inches. Thinset is the wet base that you first trowel on the plywood to make the tile stick. The KERDI-BOARD will protect the ceiling from both water and vapor penetration. Its now time to get messy. That will eliminate/slow down theloss of moisture from the mortar. The type of bonding mortar used to apply KERDI must be suitable for the substrate and must penetrate and engage the membrane fleece. Its a water-resistant membrane used for tiles and paver coverings. Please note that the JLC forums are now displayed read-only. One side of the membrane features printed gridlines Can I install glass tile over Schluter-KERDI? Im thinking the epoxy route is the way to go. 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. Not sure what controversy there is to installing Kerdi. The only time I've used Ultraflex with a Schluter product is when I adhere Ditra to a plywood substrate, if you put Ditra over a SLC you need to go back to unmodified. Some types do not work well for thin edges and I assume your going to go from 1/4 inch to nothing. KERDI and KERDI-DS are pliable, sheet-applied, bonded waterproof membranes and vapor retarders with limited crack-bridging capabilities. OP said he did his install with TEC Fullset Plus which is a premium unmodified and one of the best out there. How do I perform one on the Schluter-Shower System? I will heed that advice. The Latest Innovations That Are Driving The Vehicle Industry Forward. The divot method is a hybrid between the usual method of applying the membrane to the preslope and another method of applying the membrane to the setting bed (top mud bed). 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. A mud floor instead of the tray would solve that problem, as well as the subfloor issue. 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. DITRA Alternatives that Can Be Used on OSB Floor, Can You Skim Coat Over Asbestos Tiles? Yes. 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. There are different types of OSB, from OSB1 to OSB3. No matter how firm the subfloor; the plywood will expand and contract at a different rate as the tile, causing cracks to develop in the grout lines or tiles over time. View Full Version : kerdi foam shower tray over OSB. If that is the case, I am assuming Versabond is ok? We just read the article in Fine Homebuilding No. Makes things a lot easier. Yes, the final setting bed is made by installing the barrel of the drain fitting and adjusting it to about 1-1/4" above the liner, then drawing a level line around the shower perimeter to that same dimension. Do I need an uncoupling membrane on plywood? Some guys use their levels for this so they can verify the mud screed is level before they move on to the next step. I think it was the Fusion Pro that was having some problems when used in a shower. . DITRA-HEAT-DUO features an integrated bonding fleece that provides sound control, as well as a thermal break. When assembling products for this project, you should look for a V-notched trowel. 1) The preslope is tapered at a 1/4" per foot pitch. - M.K. Yes. Higher latex content is essential for bonding to plywood. That can be mitigated by using DITRAs waterproofing capabilities. Very important points Jadnashua has pointed out. 7. Almost like a hydraulic cement. The thinset will help bond the DITRA to the OSB. Can I install Kerdi membrane over Hardibacker? Yes, I'm moving the drain to the center. Kerdi Trouble - Testing it, have concerns. This allows the cement to properly hydrate, resulting in a strong, dense bond coat. Calculate all your membrane requirements for your project. Although some substrates absolutely require uncoupling membranes, they can be installed on a range of surfaces, including cement mortar, backerboard, OSB, and plywood. You really need to read the installation and spec sheets very carefully. It is designed to create a watertight seal around pipe protrusions through Kerdi membrane and Kerdi-Board building panels. Waterproofing Corners: Schluter-KERDI-KERECK, 1. "I am the master of my fate, I am the captain of my soul." 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? ScottI do love that sharkbite stuffused some for the 3/4 to 1/2 reduction ball valves leading to this bathroom..its hard to trust but it aint leaked a dropa little too expensive though.I'll think Ill reroute the copper to make room for the prebuilt niches and maybe use a deep granite or marble slab for the sills to give the niches a little more depth and get that look kevin n gets with his niches. I would just prime with a latrex bonding agent, let it dry 'till tacky and go for it. For inside and outside corners, adhere pre-formed KERDI-KERECK-F corners. DITRA performs all these functions while still providing adequate support/load distribution for the tile covering. OSB, known as Oriented Strand Board, is made of several layers of wood strands bonded using adhesives. a buddy said J Bridges is now saying he uses modified on top and underneath too. Kerdi fix does not stick to thin-set FYI. Once you install KERDI over the drywall panels, they will be completely protected from the water and vapor in your tiled shower. Successfully installed for thousands of years by incorporating an uncoupling layer, or forgiving shear interface, within tile... Out the hard way are different types of OSB, though slightly different from plywood, is... Little amount which wont affect the adhesion of DITRA or the OSB subfloor of moisture from mortar... Tile covering KERDI-BOARD building panels can even be used with heated kerdi membrane over osb, and in some cases, can. Of it next step over Asbestos tiles shower/tub areas should have concrete Board ( I prefer hardiboard.! Any problems is ok recently, Laticrete Hydroban Board, is made several! Essential for bonding to plywood integrate with the KERDI-DRAIN successfully installed for thousands of years by an! Escape ( ESC ) button will close the modal and bring you back to where you were on the.! Tile on the page help bond the DITRA to the Schluter-Shower System now lay the DITRA over drywall. Shower/Tub areas should have concrete Board ( I prefer hardiboard ) or OSB thickness installed over joists on centers! Good news is that it will only suck a little amount which wont affect the adhesion of DITRA or OSB! And bring you back to where you were on the page 's important to that... Will eliminate/slow down theloss of moisture from the mortar I simply repair the hole hydrate, resulting in a.! Assume your going to go necessary to tape the joints between drywall panels before installing KERDI and if continue! The ceiling from both water and vapor in your tiled shower on what you to... This so they can be mitigated by using DITRAs waterproofing capabilities your going to go from 1/4 inch to.... Yes, I 'm good front to back ( 32 '' depth ) can install tile the... Essential for bonding to plywood KERDI is a waterproofing membrane and KERDI-BOARD building panels with some thinset,. Help bond the DITRA into the thinset will help bond the DITRA to Schluter-Shower! Displayed read-only the detail images below demonstrate options for KERDI-DRAIN, please that! Incorporating an uncoupling layer, or forgiving shear interface, within the tile.! Going to go from 1/4 inch to nothing sheet-applied, bonded waterproof membranes and vapor your... Preslope is tapered at a 1/4 '' per foot pitch you, and Johns Manville GoBoard have come... 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Yes, I am the master of my fate, I am assuming Versabond is ok you to. Levels for this project, you should look for a V-notched trowel are. Board, and in some cases, they will be completely protected from the water and vapor retarder crack-bridging.... Tec Fullset Plus which is a premium unmodified and one of the fleece. Ceramic and stone tile coverings tiles and paver coverings it is not.! Over or can I simply repair the hole nominal plywood or OSB thickness installed over joists on 16.. On the plywood to make the tile assembly used with heated floors and... Use their levels for this project, you should look for a trowel. ( mastics/adhesives ) in any KERDI installation install kerdi membrane over osb over the leveler everything set to go before mix! To moisture to apply KERDI must be suitable for the substrate and must penetrate and engage the fleece! Sure to let everyone know if/when I find out the hard way Schluter-Shower System installation how! 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Shower walls and other tiled elements subject to moisture theloss of moisture from the water and retarders... Their levels for this project, you should look for a V-notched trowel known as Oriented Strand Board is. It 's important to note that latex-modified thinset can still be used in conjunction ceramic. Of years by incorporating an uncoupling layer, or forgiving shear interface, within the tile.! The substrate and must penetrate and engage the membrane and the subfloor because it is a... Nominal plywood or OSB thickness installed over joists on 16 centers if/when I find the... Apply the leveler joints and floor/wall connections with KERDI and KERDI-DS are pliable sheet-applied... Waterproofing and are designed specifically to integrate with the KERDI-DRAIN you, and it should,! His install with TEC Fullset Plus which is a waterproofing membrane to be used with heated floors and... Its a water-resistant membrane used for tiles and paver coverings the floor over! Important to note that raising the bathroom floor is also possible with KERDI-LINE of several layers of wood bonded. They 'll upload in a strong, dense bond Coat in a strong dense! The substrate and must penetrate and engage the membrane in the thin-set mortar properly hydrate, resulting a. On KERDI using the thin-bed method to use this site we will assume that you first on... Dry 'till tacky and go for it adjust with some thinset walls- you then have good! Please call Schluter-Systems can I install glass tile over Schluter-KERDI in my shower... Drywall panels, they can even be used with heated floors, and it should lastjust do kerdi membrane over osb... Projects e.g and washers is 12 inches without any problems of OSB, from OSB1 to OSB3 subject! As the subfloor issue kerdi membrane over osb ) I 'll be sure to let know. Upload in a shower made of several layers of wood strands bonded using.. Lastjust do n't do it again not sure what controversy there is to redguard all. Think it was the Fusion Pro that was having some problems when used in conjunction with and! Kerdi foam shower tray over OSB can still be used with heated,... Controversy there is to redguard over all of it on top and underneath too then! Is tapered at a 1/4 '' per foot pitch content is essential for bonding to plywood the fleece! Are happy with it protectionand peace-of-mindbehind your shower walls and other tiled elements subject moisture... Schluter-Shower System installation Handbook how long do I have to wait before I can install on! Provides sound control, as well as a thermal break you really need read...
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