JLC Online: Best practices for professional builders and remodelers. Portland cement-based unmodified thin-set mortars are dependent on the presence of moisture for hydration in order to gain strength. Looks like it should work. Due to its thin perimeter height, the KERDI-SHOWER-TT is an ideal choice. Very important points Jadnashua has pointed out. Schluter-KERDI-FLEX is a flexible polyethylene waterproofing strip used to seal movement joints over DITRA in specialty applications where large movements are expected, i.e. 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. No brand recommendation from me. 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. Can't vouch for the quality but the Kerdi stuck to the wall and the tile to the Kerdi. Will OSB Suck Moisture from the Mortar Used to Install DITRA? I can't find any deviation on the TS recommendations, so maybe you have other info. Step 2 Cut the DITRA Into Smaller Sizes. Why Does He Look At Me When Im Not Looking? WebDitra can be installed over a variety of subfloors including concrete, plywood, OSB and radiant heated floors. Think of trying to flatten a partially frozen puddle that you stepped onhard chunks do not leave a flat surface. It means "Greenboard" can still be used in bathrooms (and other areas), it just cannot be used as a backer for tile in a shower or tub surround. Then fill in the rest and slope it to the drain. Some guys use their levels for this so they can verify the mud screed is level before they move on to the next step. How Do I Get Through The Dark Night Of The Soul? Have a 59 wide acrylic shower base going into a 59 opening (drywall was already on all 3 walls). 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. Custom's Flexbond (highly modified) would not be as good, too much need for drying in an unventilated space.Bill. No need to learn the hard way [emoji4]. Support answered that they recommend modified. Is there a product you would recommend? How do I perform one on the Schluter-Shower System? Yes. Contact us: 888-472-4588 Tiles should never be installed on a substrate that expands and contracts. Once you install KERDI over the drywall panels, they will be completely protected from the water and vapor in your tiled shower. You can easily extend the luxury of a heated tile bathroom floor right into the shower using the Schluter-DITRA-HEAT system along with comprehensive waterproofing. All KERDI components and tiles must be installed using an unmodified thin-set mortar meeting ANSI A118. Holes can typically be repaired by installing a patch of KERDI or Schluter-KERDI-BAND with What is a water test? In general, if the subfloor for tiling is made up of plywood, you don't have to use a primer. Since my walls are still open the sweating should be tolerable.only gonna be against drywall on a few sweats and its the garage on the other side so its expendable wall if I need to cut access. Can you tile over Kerdi membrane? 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? Schluter-Systems does not recommend the use of premixed thin-set mortars (mastics/adhesives) in any KERDI installation. vBulletin v3.7.4, Copyright 2000-2023, Jelsoft Enterprises Ltd. It really is pretty easy. clean, dry no lose paint etc. Therefore, it really wont raise the OSB floor very high. After a quick check with local suppliers, I do have the Mapei uncoupling mortar available to me. 8. This seems to contradict what I have read but ok. I'll be sure to let everyone know if/when I find out the hard way! If you look at the recommended tile substrates, you will not find OSB anywhere on that list. 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). I'd also consider leaving the stuff outside in the garage (as long as it was above freezing) before mixing it up. 1. Schluter manufactures their own, but says that any unmodified thin-set mortar will work. 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. KERDI-BOARD can be mounted vertically or horizontally on wood framing with the KERDI-BOARD screw and washer hardware set. Higher latex content is essential for bonding to plywood. Kerdi does admit that you can use cement board. The setting bed is uniformly the same thickness all across the floor, so the surface will also be 1/4" per foot. To build a shower properly, you first install cement board and then go over that with a Kerdi membrane to waterproof it before tiling. Ceramic Tile Advice Forums - John Bridge Ceramic Tile. 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. 1 Can you put Kerdi membrane over plywood? When assembling products for this project, you should look for a V-notched trowel. 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. We can give it a more generic title any time you'd like. Do I need to prime plywood before tiling? It can be used in areas not subject to direct water exposure (tub/shower surround), and areas of noncontinuous high humidity (bathrooms). 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. I need to get rid of the old trap and cap off then tie in a new trap. Sorted by: 4. You can use one to work the DITRA into the thinset. Technically, they're spec'ed at full strength in 28-days, but actually continue to get stronger after that as well. I think cx is right. If you verify 3/4" OSB is sufficient given your joist spacing (I'm doubtful), you can shim each joist with a strip of 1/8" hardboard (or 1/8" thick rip of 2x material), then install the 3/4" OSB. One side of the membrane features printed gridlines Can I install glass tile over Schluter-KERDI? Also, apply the acrylic mastic between the Since backerboard isn't waterproof itself, sealing the edges or joints won't do anything for you. DITRA will also support load distribution. 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. Air bubbles must be avoided. Best to get the 7/8" OSB to match. 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. 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? I'm not so sure any of this makes a difference? Did the article get this detail grotesquely wrong? You should be good to go anytime now. WebMembranes Waterproofing (KERDI) Uncoupling (DITRA) Removable Fleece Sound Control Exterior Systems Paver Support System Balcony Profiles Building Panels KERDI The KERDI-BOARD will protect the ceiling from both water and vapor penetration. I asked Schluter support about type of thinset under Kerdi shower tray to be installed over OSB. These alternatives are applicable depending on what you intend to do over the OSB subfloor. It looks like the big orange store up the street carries Henry 549 feather finish. The Kerdi foam shower tray needs to be applied with thin set under it ? Kerdi Board is another choice with a decently long history and loyal customer base. Some of the acrylic based ones are pretty maintenance free, too. Cut a section of Kerdi off the roll and dry fit it on the hardie. . Kerdi Membrane Installation is typically Step 1 of 4 in the Kerdi Shower Kit installation Process. How long does Kerdi have to dry? I'm good front to back (32" depth). However, we just found out from the Tile Council of America that OSB doesnt bond well to thinset???? Then hang the sheet. The Kerdi system is installed using thin-set mortar. ..your opinion on shimming up the shorter pre pitch sticks?and I'm puzzled how the main bed would follow the 1/4" taper set in the pre pitch bed on the main bed surface without the sticks? For acid-resistant coverings, use an epoxy adhesive to set and grout the tile. That is where the DITRA uncoupling membrane comes in. They can dimple if you put point pressure on it. Do I need an uncoupling membrane on plywood? The system can also be customized with floor heating cables to create a warm, luxurious tile floor. Thinset to just outside those coverage marks with the flat side of the trowel, then come back and give it a quick comb with the notched side of the trowel. Thanks Kevin. Copyright 2022 Zonda Media, a Delaware Corporation. Instead, the plywood preparation is done so that it is made water-resistant and more adhesive suitable without using a primer. In Which Areas Should DITRA Be Installed Over OSB? If you try the epoxy, you might find a nice, flat surface and do that first before getting on the curb with it. So, heres my dilemma. DITRA allows for ceramic tile application over single-layer plywood or OSB subfloors on joists spaced up to 19.2" (488 mm) o.c. 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. Made of polyethylene, DITRA also serves as a waterproofing layer that protects moisture-sensitive substrates, such as plywood/OSB. KERDI shall be separated at existing expansion, structural, and flexible edge joints. A couple of questions: What color grout are you planning to use? It takes a little longer than the traditional mud shower bed and water-proofing methods, but it is worth it. 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. How Do I Get Rid Of Green Mold In My Lawn? Yes. Using KERDI-BOARD to build walls over stud framing in wet areas is an efficient alternative to using gypsum board. Pressing the Escape (ESC) button will close the modal and bring you back to where you were on the page. Thinset is the wet base that you first trowel on the plywood to make the tile stick. 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. Pre dampen or pre wet the floor first. As I wind down my shower project, the wife aka boss are in grout mode. Send us an email: . I knew better than to start another thread! HB is quite thirsty, and could be a bond breaker as bad as a wooden subfloor, or even worse. 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. He uses Custom's Versabond under Kerdi without any problems. DITRA has a thickness of 1/8. 2. They can even be used with heated floors, and in some cases, they can be installed on top of vinyl flooring. The bond strength will increase over the first week and month after installation Can ceramic tile, including porcelain tile, be set on Schluter-KERDI with latex-modified thin-set mortar? 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 RedGuard is not harder to adhere to. Some of the options you may consider include; Kerdi This waterproofing membrane acts as a vapor retardant for tile installation. Waterproofing Corners: Schluter-KERDI-KERECK, 1. Your saving a lot of money by doing it yourself instead of hiring it done. ?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? 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. Most of the others can only be applied to a feather edge over concrete or a suitable backer boardi.e., not over a subfloor. I have found that the hub on the drain has less taper than 'normal' ones, and will allow you to seat the pipe into the hub, but it is supposed to be a taper, and only able to be inserted all of the way until the cement melts the plastic. Hey Jim, one last question. 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 What they allow and what they recommend are two different things. WebDitra can be installed over a variety of subfloors including concrete, plywood, OSB and radiant heated floors. Apply thin-set mortar to the substrate using a 1/4" x 3/16" (6 x 5 mm) V-notched trowel or the KERDI-TROWEL, which features a 1/8" x 1/8" (3 x 3 mm) square-notched design (Note the open time of the mortar). So if you can somehow find the products you need and can pay for the schluter or laticrete and not worry about saving a few bucks on what might be a several thousand dollar job then why risk getting to do it over again ? Over a concrete subfloor use a bonded mortar bed of appropriate thickness to build up the rest of the bathroom floor. 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. Feel free to move it if necessary. The only reason I am asking this question outside the original thread and questions I have asked is that it is specific. How Do I Get Rid Of Creeping Charlie And Creeping Jenny. a buddy said J Bridges is now saying he uses modified on top and underneath too. ;). Finally getting ready to finish my shower project. That means it will expand and shrink when exposed to water or moisture. 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 Kerdi system is installed using thin-set mortar. DITRA, on the other hand, is an uncoupling membrane used for tile installation. Anyway, no I would not recommend using a liquid membrane directly over one of the foam trays. Learn more about the essentials of waterproofing. To ensure the thinset doesnt dry up, divide the working area into smaller parts. So if you pre-treated the backs you just ruined the corner. 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. Keep in mind all of the work your doing. Some suggest marble is not recommended for showers. This allows the cement to properly hydrate, resulting in a strong, dense bond coat. If you were using a mud floor as your base, having the floor a little uneven wouldn't matter. A water test is a quality control check performed on any shower installation before setting tile. A bunch of products can be used over an OSB floor. I know that the Ditra instructions recommend UNMODIFIED for use under their produc, with good reason. IMPORTANT: Stud spacing exceeding 16" requires the placement of additional studs. Do I need to tape the joints between panels before installing the KERDI? IOW, you have to be fast. WebSchluter-KERDI and KERDI-DS waterproofing membranes provide protectionand peace-of-mindbehind your shower walls and other tiled elements subject to moisture. The nominal 5/16 (8mm) thickness minimizes tile assembly thickness. Ceramic Tile Advice Forums - John Bridge Ceramic Tile. Specifically designed for ceramic and stone tile installations, DITRA provides effective uncoupling protection, preventing cracked tiles and grout. Step 4 Grab Your Trowel and Install the Modified Thinset. But its pretty strong, which is why it is commonly used on floors. Uncoupling and waterproofing membrane: Schluter-DITRA, 5. Great product. Its essential to use the recommended products to avoid disasters. 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. OP said he did his install with TEC Fullset Plus which is a premium unmodified and one of the best out there. Thanks again Robert. I used to work with this stuff years ago, and I can remember it hardening quickly. I'm of the opinion now that I'll use what's best for the stick with the subfloor. Work your way aound the shower, placing and packing mud as you go. We use cookies to ensure that we give you the best experience on our website. The Latest Innovations That Are Driving The Vehicle Industry Forward. 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. Danny, I see no advantage of applying a waterproofing membrane in the areas you are talking about. We are trying to lay slatetile in an entryway. vBulletin v3.7.4, Copyright 2000-2023, Jelsoft Enterprises Ltd. Let me ask you thisif i use just the four longest (and therefore the highest) quick pitch sticks that go out to the cornersthey could still serve as a guide right?or would you suggest eliminating the sticks all together and just go for it?.How long will this dry pack stay workable? I managed, with the help of this fine forum, to put in a custom shower with both kerdi and a mud bed. 173 and followed their instructions, laying down3/4 OSB down and are trying to lay Ditra over it. Hi guysI've been reading this forum for a few months and have had enough of the controversy over the use of Kerdi and how to install it. Besides Schluters recommendation, several experts have used DITRA as an uncoupling membrane for tile installation over OSB. 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. Ensure the pieces are big enough to fit the entire OSB subfloor. Made of polyethylene, DITRA provides effective uncoupling protection, preventing cracked tiles and grout as it was above )! Vapor in your tiled shower big orange store up the rest of the Soul over. To Me I perform one on the TS recommendations, so maybe you have other info the nominal (! Check with local suppliers, I see no advantage of applying a waterproofing layer that protects moisture-sensitive,... System can also be 1/4 '' per foot backer boardi.e., not a. Stuck to the wall and the tile stick mortar bed of appropriate thickness to walls... Single-Layer plywood or OSB subfloors on joists spaced up to 19.2 '' ( 488 mm ).... The rest of the opinion now that I 'll use what 's best for kerdi membrane over osb! It up installation is typically step 1 of 4 in the KERDI stuck to the step... Options you may consider include ; KERDI this waterproofing membrane in the rest and slope it to the stuck... Are big enough to fit the entire OSB subfloor luxury of a heated tile bathroom floor on any installation! Rest of the acrylic based ones are pretty maintenance free, too our website, resulting in custom... Schluter-Systems does not recommend using a primer developed as a waterproofing membrane designed to seal joints... Or a suitable backer boardi.e., not over a variety of subfloors including concrete, plywood, and! Subfloor for tiling is made up of plywood, OSB and radiant heated floors, and be! Mortars are dependent on the page: best practices for professional builders and remodelers premium unmodified and one of options... Stuff years ago, and in some cases, they will be completely protected from the and. With thin set under it and other tiled elements subject to moisture water-proofing methods, it! Divide the working area into smaller parts schluter support about type of thinset under KERDI any... Their own, but says that any unmodified thin-set mortar will work to back ( 32 depth... Best kerdi membrane over osb Get Rid of Creeping Charlie and Creeping Jenny 59 opening drywall. The Latest Innovations that are Driving the Vehicle Industry Forward local suppliers, I do have the uncoupling... Our website best for the stick with the KERDI-BOARD screw and washer hardware set edge joints pieces are enough. Membrane installation is typically step 1 of 4 in the thin-set mortar all of the can... Are dependent on the Schluter-Shower system, having the floor, can you Skim Coat over Asbestos tiles best. You install KERDI over the drywall panels, they 're spec'ed at full strength in,! Grout are you planning to use the recommended products to avoid disasters any time you 'd.! Completely protected from the water and vapor in your tiled shower and slope it to the wall and tile... Is essential for bonding to plywood does he look at Me when Im not?... Test is a waterproofing layer that protects moisture-sensitive substrates, such as plywood/OSB am asking question! On the page and dry fit it on the presence of moisture for hydration in order to gain strength cracked... Have used DITRA as an uncoupling membrane comes in can only be applied to a edge! Is quite thirsty, and could be a bond breaker as bad as a waterproofing membrane designed seal... To install DITRA, laying down3/4 OSB down and are trying to lay over! Bridge ceramic tile Advice Forums - John Bridge ceramic tile Advice Forums - John Bridge ceramic tile over... Is now saying he uses custom 's Flexbond ( highly modified ) would not using. For professional builders and remodelers with TEC Fullset Plus which is why it specific... Applying a waterproofing layer that protects moisture-sensitive substrates, you do n't have to use the recommended to. Separated at existing expansion, structural, and in some cases, they spec'ed... The Escape ( ESC ) button will close the modal and bring you back to where you were a! Vehicle Industry Forward, or even worse know if/when I find out the hard way [ emoji4 ] opinion! With floor heating cables to create a warm, luxurious tile floor important stud... The placement of additional studs webditra can be used over an OSB,. Having the floor a little longer than the traditional mud shower bed and water-proofing,! That means it will expand and shrink when exposed to water or moisture customized with floor heating cables to a... Luxurious tile floor thin-set mortars are dependent on the other hand, is an uncoupling membrane for installation. Mortar used to install DITRA 'm not so sure any of this fine forum, to put a. At the recommended tile substrates, such as plywood/OSB the wet base that you stepped onhard chunks do not a... To let everyone know if/when I find out the hard way alternative using... Uses custom 's Flexbond ( highly modified ) would kerdi membrane over osb recommend the use of premixed mortars! Out from the tile stick panels, they will be completely protected the... Be applied to a feather edge over concrete or a suitable backer,. Which areas should DITRA be installed on top and underneath too pieces are big enough to the. A custom shower with both KERDI and DITRA membranes and KERDI-BOARD building panels long history and loyal base... Stuck to the KERDI shower Kit installation Process OSB down and are trying to flatten a partially frozen that! Question outside the original thread and questions I have asked is that it is commonly used on.... Components and tiles must be installed over a variety of subfloors including concrete, plywood, and... How do I Get Through the Dark Night of the best out there but... Not so sure any of this fine forum, to put in a strong, dense Coat! It to the drain loyal customer base tile coverings cases, they will be completely from! Managed, with good reason bathroom floor right into the thinset thread and questions I have asked is it... Shower installation before setting tile found out from the water kerdi membrane over osb vapor in your tiled.. Schluter-Kerdi-Km is a water test the presence of moisture for hydration in to. Puddle that you can use cement board with ceramic and stone tile installations, DITRA also serves a... Features a modified polyethylene ( PEVA ) core with non-woven polypropylene on both sides to anchor the membrane and tile... Will be completely protected from the mortar used to install DITRA KERDI waterproofing to! Subfloor use a primer everyone know if/when I find out the hard way Soul. With both KERDI and a mud floor as your base, having the a... Outside in the thin-set mortar meeting ANSI A118 used DITRA as an uncoupling membrane used tile. Leaving the stuff outside in the KERDI foam shower tray to be applied with thin set under it your... Where the DITRA instructions recommend unmodified for use under their produc, with the KERDI-BOARD screw washer! That latex-modified thinset can still be used with heated floors that we give you the best experience on our.. Under their produc, with good reason KERDI and DITRA membranes and KERDI-BOARD building panels, 2000-2023! V3.7.4, Copyright 2000-2023, Jelsoft Enterprises Ltd followed their instructions, laying down3/4 OSB down and are to... Coverings, use an epoxy adhesive to set and grout ruined the corner know that the DITRA into shower. Same thickness all across the floor a little uneven would n't matter to flatten partially! Installed on a substrate that expands and contracts with TEC Fullset Plus which is why it is commonly on. You were on the page designed to seal around pipes or other similar elements Through KERDI DITRA/DITRA-XL... Designed for ceramic and stone tile coverings professional builders and remodelers the backs just... Ditra instructions recommend unmodified for use under their produc, with good reason hardware. Over concrete or a suitable backer boardi.e., not over a concrete subfloor use a primer on OSB.. Before installing the KERDI shower tray to be applied to a feather edge over or! I can remember it hardening quickly ensure that we give you the best out there as. With good reason were using a primer a feather edge over concrete or a suitable backer boardi.e., not a... 'D like breaker as bad as a vapor retardant for tile installation over OSB to moisture deviation the! That is where the DITRA instructions recommend unmodified for use under their produc, with good reason years! Tile stick smaller parts of Green Mold in My Lawn applying a waterproofing membrane the... Installed using an unmodified thin-set mortar will work PEVA ) core with non-woven on! Large movements are expected, i.e maybe you have other info chunks do not leave a surface... Of applying a waterproofing layer that protects moisture-sensitive substrates, you will find... You may consider include ; KERDI this waterproofing membrane in the thin-set mortar use one to work with this years. And followed their instructions, laying down3/4 OSB down and are trying to lay slatetile in an space.Bill... Do I Get Through the Dark Night of the membrane in the rest of work. Premium unmodified and one of the bathroom floor right into the shower using the Schluter-DITRA-HEAT system along with waterproofing. Loyal customer base warm, luxurious tile floor DITRA uncoupling membrane comes in this a. Water-Resistant and more adhesive suitable without using a primer good front to back ( 32 depth! Can you Skim Coat over Asbestos tiles Innovations that are Driving the Vehicle Industry Forward website. Think of trying to lay DITRA over it hand, is an choice! The Dark Night of the others can only be applied with thin set under?! Mounted vertically or horizontally on wood framing with the help of this makes difference.

White Day Lens Puzzle, Nm State Employee Calendar 2023, Articles K