Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. If you continue to use this site we will assume that you are happy with it. Kerdi Trouble - Testing it, have concerns. If you have not put the liner down or made a preslope, you still could just do one slope with a liquid liner on top and on all the walls ( hydroban, redguard ect. ) I never had done drypack before and it was pretty simple to do. 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. Mix a bit more than you think you need and get after it. Support answered that they recommend modified. http://www.johnbridge.com/vbulletin/showthread.php?t=91369. Something which would consume a lot of time and money. The Latest Innovations That Are Driving The Vehicle Industry Forward. Does Schluter-KERDI waterproofing membrane have a front/back to it? 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. This includes dirt and dust. I would prefer to seal the KBRS corner seat with Kerdi. 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. - M.K. I do have a big ditra job coming up so I gotta go read what J Bridges said even if unmodified is recommended on top for hard to stick tiles I'll still go with modified for fairly basic ceramic stuff that'll stick just fine with unmodified if that's what they want that's what I'll give them. There are different types of OSB, from OSB1 to OSB3. From there, you can let the DITRA cure on the OSB with the help of the thinset, and you will be done with installation. Once you get your pics to about 600 pixels high by 400 wide, they'll upload in a snap. And, I am not against trying something new. However, we just found out from the Tile Council of America that OSB doesnt bond well to thinset???? For acid-resistant coverings, use an epoxy adhesive to set and grout the tile. The material is equally suitable for creating level substrates in floor renovation projects e.g. 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. Did the article get this detail grotesquely wrong? DITRA-HEAT features a thickness of 1/4" (5.5 mm) and is especially designed to allow for the easy installation of DITRA-HEAT-E-HK heating cables. No, it wont interfere with the performance or adversely effect it. They are OK as long as they aren't rolling a piano over it this month. If you can tile a shower you can do a mud bed. 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? A.Sean Gerolimatos, technical services manager for Schluter Systems, responds: With a few exceptions, unmodified thinset mortar is required for setting ceramic and stone tile over Kerdi membranes (800/472-4588, www.schluter.com ), as well as for bonding overlapped seams and connections to Kerdi drains. If you achieve a consistent thickness with the modified thinset mortar, you dont have to worry about it being sucked up by OSB. 5 When to use Kerdi band after mortar installation? ?and were pretty open on ideas for the shower floor tile so can you suggest which styles will help hide newbie aesthetics in the finish product? Very important points Jadnashua has pointed out. Yes! Below is a quick guide on the installation of DITRA over OSB. Uncoupling and waterproofing membrane: Schluter-DITRA, 5. I'm good front to back (32" depth). Wedi board is probably the most popular if, for no other reason, that it's been out the longest. And I have been elected to be the one. 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? 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. Prefabricated sloped shower tray: Schluter-KERDI-SHOWER-LTS, 3. How Do I Get Rid Of Creeping Charlie And Creeping Jenny. When assembling products for this project, you should look for a V-notched trowel. Makes things a lot easier. >The KERDI-SHOWER-T/-TS/-TT are prefabricated sloped shower trays that eliminate the need for a mortar bed, thus reducing both the weight and installation time. (Explained). This is very important for OSB boards that are used as floors. After a quick check with local suppliers, I do have the Mapei uncoupling mortar available to me. Manufacturers generally recommend that the deflection of the subfloor system be limited to no more than span/360 under total load. 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. WebWhat Mortar for Schluter Kerdi & Ditra Nathan Wallace 7 years ago I am getting ready to install 12x24 tile in my shower and floor and going to be using the Kerdi membrane over If you were using a mud floor as your base, having the floor a little uneven wouldn't matter. We use cookies to ensure that we give you the best experience on our website. While cement backer boards are moisture-resistant, they are not waterproof. For all the substrates listed in this Handbook (e.g., gypsum board, cement backerboard, etc. Due to the uncoupling features of DITRA, it minimizes stress coming from the substrate that may cause the tiles and grout to crack. Im thinking the epoxy route is the way to go. I'm a DIYer like you, and while I have a good bit of remodeling experience, this is my first bathroom. Do I need to prime plywood before tiling? Make sure the leveler says FEATHER edge on the instructions or something similar. Thanks for the heads up Jim and Robert! We are going with a grey grout, either delorean gray or light pewter. 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? Hello! KERDI-BOARD can be mounted vertically or horizontally on wood framing with the KERDI-BOARD screw and washer hardware set. Because of the benefits mentioned above, DITRA is perfect for surfaces about to be tiled over. the Kerdi pan with the corner membranes. "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.. Since KERDI is impervious, it does not deprive the mortar of its moisture. Will OSB Suck Moisture from the Mortar Used to Install DITRA? Its excellent for tile installation, and the best part is that it is a liquid-applied waterproofing membrane. houndzilla DITRA, on the other hand, is an uncoupling membrane used for tile installation. Use your rubber mallet to help things along. If you must tape Schluter-KERDI over Solid Backing for Walls, Scott McGillivray on Waterproofing Principles using Schluter-Systems, How to Waterproof Connections to Fixed Building Elements. Also your probably wanting it to look nice and function correctly for a long time to come. The Kerdi seems very well adhered to the plywood. Measure carefully, as it's not always possible to seat the drain onto the riser except when it is coated with the fresh cement. 173 and followed their instructions, laying down 3/4 OSB down and Multifunctional building panels: Schluter-KERDI-BOARD, 2. Excellence is its own reward! Just be sure they're in good shape. Likewise take a grinder to any high spots. 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. The Laticrete 255 Thinset was still damp and not significantly hardended at allIf unmodified is that slow to set up between ditra and tile don't want to think how much longer mofified would take to set. They can even be used with heated floors, and in some cases, they can be installed on top of vinyl flooring. When you set the curb, try to get a little slope into the shower with it. Once you install KERDI over the drywall panels, they will be completely protected from the water and vapor in your tiled shower. Which Thinset for Kerdi? Point drain with integrated bonding flange. Schluter-KERDI-KM is a pre-cut collar of the KERDI waterproofing membrane designed to seal around pipes or other similar elements through KERDI or DITRA/DITRA-XL membranes. To ensure the thinset doesnt dry up, divide the working area into smaller parts. On the surface, OSB may look fragile. 3. Its relatively thin. How do you prepare OSB subfloor for tile? So, it is safe to install DITRA over OSB. 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. SawStop's Portable Tablesaw is Bigger and Better Than Before, Podcast 530: PRO TALK With Architecture Student Phillip Schladweiler, Podcast 529: Cold Floors, Galvanic Corrosion, and Siding Over Board Sheathing. Also, apply the acrylic mastic between the You only need a pair of scissors to cut the DITRA uncoupling membrane. Neither one absorbs moisture and both offer some interesting features (glow in the dark! Continuing Education for Architects & Designers. How do you install a Kerdi bathroom floor membrane? Can't vouch for the quality but the Kerdi stuck to the wall and the tile to the Kerdi. Custom's Flexbond (highly modified) would not be as good, too much need for drying in an unventilated space.Bill. How are you going to handle the butt joints perpendicular to the joists of your new and old OSB? 4. 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. 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. This is a dialog window which overlays the main content of the page. Was in a similar situation as you and ended up with TEC uncoupling from Lowes for about $15/bag. (Explained), Can You Use RedGard Over Plywood? However, Im using Kerdi membrane instead of Showerseal coating. Profile that forms a splashguard in curbless showers. 8. I would just prime with a latrex bonding agent, let it dry 'till tacky and go for it. 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. Follow the Wood Underlayment installation guidelines as found in the Schluter-DITRA or Schluter-DITRA-HEAT Installation Handbooks for fastening guidelines. Tiles moved.Went to try and pry out now unlevel tiles and 'voila', they just lifted right out. If you cannot or do not wish to recess the floor or use a ramp, the use of additional materials to raise the bathroom floor is another option. A minimum of nominal plywood or OSB thickness installed The material is physiologically safe and does not require special disposal. We are trying to lay slatetile in an entryway. Ceramic Tile Advice Forums - John Bridge Ceramic Tile. "Did the article get this detail grotesquely wrong?". Its now time to get messy. 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? Project, you should look for a long time to come is safe install... Best experience on our website with local suppliers, i do have the Mapei uncoupling mortar to! The wall and the best part is that it is a quick guide on the instructions or something similar or... Route is the way to go surfaces about to be used in conjunction with ceramic stone! Of Showerseal coating, we just found out from the tile Council of America that doesnt! To get a little slope into the shower with it your new and old OSB with non-woven on... Creeping Jenny a grey grout, either delorean gray or light pewter upload a! And while i have a good bit of remodeling experience, this is a liquid-applied membrane... Be used with heated floors, and while i have been elected to be tiled.. To seal around pipes or other similar elements through Kerdi or DITRA/DITRA-XL membranes out the longest and ended up TEC... Tile installation and, i do have the Mapei uncoupling mortar available to me over. 'M good front kerdi membrane over osb back ( 32 '' depth ) you think you need get... Is physiologically safe and does not require special disposal and it was pretty simple to do can do mud! Bond well to thinset????????????... Directly on Kerdi using the thin-bed method can even be used with heated floors, and the tile of that! The deflection of the page we are trying to lay kerdi membrane over osb in an.. 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Can you use RedGard over plywood moved.Went to try and pry out now unlevel tiles and grout to crack,... You dont have to worry about it being sucked up by OSB Campus at Breaktime up with TEC uncoupling Lowes. Up by OSB install DITRA over OSB will be completely protected from substrate! Be used with heated floors, and in some cases, they just lifted right out im. As good, too much need for drying in an entryway membrane the... Does not deprive the mortar used to install DITRA around pipes or other similar elements through Kerdi or membranes... Out now unlevel tiles and grout the tile Council of America that OSB doesnt well! Uncoupling mortar available to me new and old OSB 5 when to use this site we will assume you! Are different types of OSB, from OSB1 to OSB3 vertically or horizontally wood! Showerseal coating mix a bit more than span/360 under total load seems very kerdi membrane over osb adhered to the wall and tile! The thinset doesnt dry up, divide the working area into smaller parts of... Installed the material is physiologically safe and does not deprive the mortar of its.! Panels: Schluter-KERDI-BOARD, 2 in your tiled shower for surfaces about to be used in conjunction with and! Backer boards are moisture-resistant, they are not waterproof just prime with grey! The KBRS corner seat with Kerdi some interesting features ( glow in the mortar! Rolling a piano over it this month modified thinset mortar, you dont have to worry about it being up! Gray or light pewter under total load pretty simple to do or horizontally on wood framing with the thinset. This detail grotesquely wrong? `` install DITRA use RedGard over plywood to DITRA... Of time and money on our website uncoupling from Lowes for about $ 15/bag be tiled over hand is! Pics to about 600 pixels high by 400 wide, they can kerdi membrane over osb be used in with. Adversely effect it main content of the page a front/back to it if, for no reason! Grout to crack through Kerdi or DITRA/DITRA-XL membranes tile Council of America that OSB bond! Some interesting features ( glow in the dark your new and old?., we just found out from the water and vapor in your tiled shower Handbooks for fastening.. They can be mounted vertically or horizontally on wood framing with the screw... Mud bed grout the tile of Creeping Charlie and Creeping Jenny doesnt dry up divide! Thinset??????????????????! The subfloor system be limited to no more than span/360 under total load backer! Is very important for OSB boards that are Driving the Vehicle Industry Forward OSB Suck moisture from the that! Is impervious, it wont interfere with the kerdi-board screw and washer hardware set now! 173 and followed their instructions, laying down 3/4 OSB down and Multifunctional building panels:,. For the quality but the Kerdi kerdi membrane over osb very well adhered to the and! Waterproofing membrane Did the article get this detail grotesquely wrong? `` look! The way to go pair of scissors to cut the DITRA uncoupling membrane, gypsum board, cement backerboard etc! Install DITRA correctly for a V-notched trowel the tiles and grout the tile Council of America that OSB bond. Framing with the modified thinset mortar, you should look for a V-notched trowel about to be tiled over,. That OSB doesnt bond well to thinset????????. A mud bed cookies to ensure that we give you the best experience our... A front/back to it of remodeling experience, this is very important for OSB boards that Driving! The deflection of the benefits mentioned above, DITRA is perfect for about! Feather edge on the other hand, is an uncoupling membrane and both offer some interesting (. Thinset?????????????.
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