kerdi membrane over osbkerdi membrane over osb

How long does Kerdi have to dry? I know that the Ditra instructions recommend UNMODIFIED for use under their produc, with good reason. Prefabricated sloped shower trays designed for KERDI-LINE linear drain. Its crucial to pre-cut before installation as that will make your work easier. There are different types of OSB, from OSB1 to OSB3. Took my old shower down to the studs and completely rebuilt it with DuraRock and then the Schluter Kerdi Shower Kit and 12x16" tiles. PVA white glue, Acryl 60, weldwood, the list goes on and one.Any tile supplier will have something. Therefore, do not be surprised when you find this material used as the subfloor of your home. The time between liquid and starting to set can be quite abrupt. The article says they used Latex modified mortar between the OSB and Ditra. For floor/wall connections, use KERDI-BAND. Can you install Kerdi board directly on studs? Mark the coverage of the Kerdi on the hardieboard. RedGard For those who are worried about DITRA raising the floor height, RedGard is an ideal alternative. - M.K. How long do I have to wait before I can install tile on the Schluter-KERDI membrane? Invictus, by Henley. If you can tile a shower you can do a mud bed. Since you're using a tray, I think you better get the 7/8". These alternatives are applicable depending on what you intend to do over the OSB subfloor. DITRA should be used over OSB floors in areas where you wish to tile. But the good news is that it will only suck a little amount which wont affect the adhesion of DITRA or the OSB itself. As a waterproof underlayment, DITRA has an open rib structure that neutralizes movement in a load-bearing substrate such as an OSB floor. Provides uncoupling, waterproofing, vapor management and heavy load distribution. 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. Also, apply the acrylic mastic between the We just read the article in Fine Homebuilding No. Ditra allows modified thinset to lay the Ditra down, but requires unmodified TS when setting the tile on the Ditra. Continuing Education for Architects & Designers. ?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? Custom's Flexbond (highly modified) would not be as good, too much need for drying in an unventilated space.Bill. Can you use green board for shower walls? 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. OP said he did his install with TEC Fullset Plus which is a premium unmodified and one of the best out there. This is a dialog window which overlays the main content of the page. We are trying to lay slatetile in an entryway. The Laticrete 255 They can easily be cut to size with a utility knife, or may be extended with dry-pack mortar. A modified needs to dry as well as cure to achieve full strength, but achieves a lot of that in the first day. ?I assume you mean do the top bed the traditional method with the calculated chalk line level worked uniformly down to the drain?? 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. 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. clean, dry no lose paint etc. Acrylic is one of the most durable materials used in the shower construction industry, and for good reason. Either will work to anchor the foam pan. "I have learned so much thanks to the searchable articles on the FHB website. Profile that forms a splashguard in curbless showers. For those who worry about water issues in the home, the Kerdi Board is the better overall choice. If so, you haven't done anything wrong. Now that you know DITRA can be used over OSB, its time to learn how to do it. Acrylic is the best system to use for shower walls because it is the safest, least high maintenance, and easy to install, meaning your shower could be done in as little as one day. An Insight into Coupons and a Secret Bonus, Organic Hacks to Tweak Audio Recording for Videos Production, Bring Back Life to Your Graphic Images- Used Best Graphic Design Software, New Google Update and Future of Interstitial Ads. The thinset will help bond the DITRA to the OSB. OSB, known as Oriented Strand Board, is made of several layers of wood strands bonded using adhesives. Using KERDI-BOARD to build walls over stud framing in wet areas is an efficient alternative to using gypsum board. That means it will expand and shrink when exposed to water or moisture. 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? Came in day after laying tile to find kids had 'walked in' the bathrom despite the levels crisscrossing the entry way. A water test is a quality control check performed on any shower installation before setting tile. However if installed on drywall it is only protecting one side. Higher latex content is essential for bonding to plywood. Danny if youre worried about sweating the fittings. look into pex and compression rings if codes permit in your local. 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? If that is the case, I am assuming Versabond is ok? DITRA offers a shortcut for installing tiles on substrates that are not considered suitable. Henry products in general are usually fine. Since backerboard isn't waterproof itself, sealing the edges or joints won't do anything for you. Before you start, you should know that if you are working on OSB, you should use modified thinset mortar. 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. The classically-inspired KERDI-DRAIN is offered in a variety of grate finishes and accommodates a wide range of tile thicknesses. As I wind down my shower project, the wife aka boss are in grout mode. No need to learn the hard way [emoji4]. bags at Lowe's that you can get for less than the cost of a 50lb bag. Our local menards has Tec, but not sure they carry that. Feel free to move it if necessary. A quick answer to the above question is that DITRA can be installed over the OSB floor. 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. From there, you can let the DITRA cure on the OSB with the help of the thinset, and you will be done with installation. Multifunctional building panels: Schluter-KERDI-BOARD, 4. Sure, grey might be "OK," but why chance it for less than 20 bucks? Both (actually, all three) methods will produce a workable shower, if done properly. We can give it a more generic title any time you'd like. DITRA performs all these functions while still providing adequate support/load distribution for the tile covering. 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? Step 2 Cut the DITRA Into Smaller Sizes. Waterproofing corners Schluter-KERDI-KERECK. For instance, you may be wondering will DITRA raise theheightof the OSB floor? And, I am not against trying something new. Some of the options you may consider include; Kerdi This waterproofing membrane acts as a vapor retardant for tile installation. I can't find any deviation on the TS recommendations, so maybe you have other info. 3. I've used both modified and un haven't noticed any difference. Uncoupling and waterproofing membrane: Schluter-DITRA, 4. 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. Your saving a lot of money by doing it yourself instead of hiring it done. When you stop and think about it, using OSB as exterior sheathing is as stupid as tiling over drywall in a shower. Therefore, it really wont raise the OSB floor very high. I will look into 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. Anyway, no I would not recommend using a liquid membrane directly over one of the foam trays. A fully waterproof assembly is easily achieved by sealing seams and fastener penetrations with KERDI-BAND. Made of polyethylene, DITRA also serves as a waterproofing layer that protects moisture-sensitive substrates, such as plywood/OSB. 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. A rubber float can make your work much easier. 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. How Do I Get Rid Of Creeping Charlie And Creeping Jenny. Well, im fearful but interested. Thanks BobI had seen the problem with the shorter pre pitch sticks solved by shimming them up with mud until level with the long outside oneswas gonna do that any suggestion on another method?maybe I'll shim em up with extra lath now that I know need that in there? This means: A minimum of 5/8 nominal plywood or OSB thickness installed over joists on 16 centers. Get complete site access to expert advice, how-to videos, Code Check, and more, plus the print magazine. Its excellent for tile installation, and the best part is that it is a liquid-applied waterproofing membrane. When you set the curb, try to get a little slope into the shower with it. Thanks for the reply, I appreciate it. We are going with a grey grout, either delorean gray or light pewter. Bonded waterproofing and vapor-retardant membrane, Waterproofing strip for use above movement joints, Waterproofing strip seals abutting joints of membranes and building panels, Preformed waterproofing corners for curbless shower applications. Tiles are designed to adhere best to concrete or cement boards which are the most popular options these days. We are very concerned about any moisture at all getting into the OSB. I accidentally poked a hole through the Schluter-KERDI while installing the membrane. 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. JLC Online: Best practices for professional builders and remodelers. I'm of the opinion now that I'll use what's best for the stick with the subfloor. I asked Schluter support about type of thinset under Kerdi shower tray to be installed over OSB. Ceramic tiling can be installed onto 23/32 OSB subflooring panels where the panels are supported by 16 o.c. Its a water-resistant membrane used for tiles and paver coverings. No gypsum levelers ! DITRA has a nominal 1/8" (3 mm)-thickness which minimizes tile assembly thickness. Schluter manufactures their own, but says that any unmodified thin-set mortar will work. 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. The anchoring fleece is embedded in thin-set mortar to provide a mechanical bond to the substrate. KERDI is ideal for use in tiled showers, bathtub surrounds, residential steam showers, and other tile applications in wet areas. Please note that the JLC forums are now displayed read-only. They are OK as long as they aren't rolling a piano over it this month. I will be using Ditraset to install the kerdi on the walls and to set the tiles. Uncoupling and waterproofing membrane: Schluter-DITRA, 5. 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. The KERDI-SHOWER-TS features an off-center drain :). "I am the master of my fate, I am the captain of my soul." Leveler I would be tempted to use as s is. California Specification 01350 is referenced by various green building standards and rating systems. While cement backer boards are moisture-resistant, they are not waterproof. That is where the DITRA uncoupling membrane comes in. How do I know if the thin-set mortar is modified or unmodified? A-holes. How do you install a Kerdi bathroom floor membrane? Free-space on the underside of the matting provides a route for excess moisture and vapor to prevent damage to the tile layer above. Wedi board is probably the most popular if, for no other reason, that it's been out the longest. It's important to note that latex-modified thinset can still be used between the membrane and the subfloor because it is not impervious. Schluter-KERDI is a pliable, sheet-applied, bonded waterproof membrane and vapor retarder with limited crack-bridging capabilities. Sorted by: 4. So what does all this mean? Kerdi Board is another choice with a decently long history and loyal customer base. Okpoint of no return looms on this shower bed Danny, I don't like the 1/4" HB in your shower floor. Point drain with integrated bonding flange. Please call Schluter-Systems Can I install Schluter-KERDI over drywall in my tiled shower? 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. ) Thanks Kevin. The material is physiologically safe and does not require special disposal. What material is used behind shower walls? More recently, Laticrete Hydroban Board, and Johns Manville GoBoard have all come on the market. And if you have some low spots after you are done you can always adjust with some thinset. :). Its a lot easier to do it right the first time and cheaper also. Makes things a lot easier. Good idea to dampen the OSB before you apply the leveler. Used unmodified as called for between ditra and tile. I need to run to lowes today anyways. . The modal window is a 'site map' of the most critical areas of the site. Air bubbles must be avoided. KERDI-BOARD building panels are quick and easy to install and allow you to achieve substrates that are flat, level, plumb, and square. 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. I did pretty much the same size enclosure with the same Schluter system, but used large format tiles for half of the enclosure and the one short dimension wall was 1/2 height. The Kerdi system is installed using thin-set mortar. Different options and thicknesses of DITRA membrane are available to best suit the needs of your project. Thinset is the wet base that you first trowel on the plywood to make the tile stick. Send us an email: , Using a Prefabricated Shower Tray and Ramp, 1. Is there a likelihood this would change over time (i.e. Seems like a decent choice when no other is readily available. Makes it real simple to install and when done right good for 50 years. 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. 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? I ask because I can get either from the same supplier and I've never used TEC. vBulletin v3.7.4, Copyright 2000-2023, Jelsoft Enterprises Ltd. I will explain why you should use the V-notched trowel. Seams can ooze the stuff, though, so be sure to knock it down when it comes out. The only reason I am asking this question outside the original thread and questions I have asked is that it is specific. Some guys use their levels for this so they can verify the mud screed is level before they move on to the next step. Building mud screeds along that line is fairly simple, just pile a row of mud against the wall so it covers the line by about an inch, then using a straight board, press the mud down until you can just see the line again. Can't vouch for the quality but the Kerdi stuck to the wall and the tile to the Kerdi. I'd also consider leaving the stuff outside in the garage (as long as it was above freezing) before mixing it up. The KERDI-SHOWER-TS features an off-center drain placement and is 1-1/2" (38 mm) high. That will eliminate/slow down theloss of moisture from the mortar. No, the KERDI membrane does not have a front/back to it. residential bathroom installations designed for foot traffic. The latter is ideal for structural and load-bearing applications such as floors. In a perfect job, it will waterproof. A DITRA uncoupling membrane will provide the following benefits to an OSB floor; Using its uncoupling features, DITRA will prevent the movement of stress from the OSB as it expands or contracts which can cause tile and grout to crack. We use cookies to ensure that we give you the best experience on our website. About 1/4" off with a 6 ft. Level. houndzilla This allows the cement to properly hydrate, resulting in All KERDI components and tiles must be installed using an unmodified thin-set mortar meeting ANSI A118. or OSB Joists, I-joists, or trusses Ceramic or porcelain tile Unmodified thin-set mortar DITRA-HEAT or DITRA-HEAT-TB uncoupling membrane and heating cables Latex p.c. Made of polyethylene, DITRA and DITRA-XL serve as a waterproofing layer that protects moisture-sensitive substrates, such as plywood/OSB. The combination of these four essential functions allows for the successful installation of tile over a wide range of substrates, including plywood/ OSB, concrete, gypsum, heated floors, etc. This way any moisture that makes it past the grout can't cause any damage. For all the substrates listed in this Handbook (e.g., gypsum board, cement backerboard, etc. HB is quite thirsty, and could be a bond breaker as bad as a wooden subfloor, or even worse. KERDI-BOARD is one of my favorite waterproofing boards because it's light, easy to cut and has lines on it for aligning the screws. Its important to note that when working with a concrete subfloor, a bonded mortar bed of appropriate thickness must be used to build up the rest of the bathroom floor. DITRA has a thickness of 1/8. Only use Schluter screws and washers to attach KERDI-BOARD to the studs. They can even be used with heated floors, and in some cases, they can be installed on top of vinyl flooring. Do I need to start over or can I simply repair the hole? 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. Latex-modified mortars must dry for the polymers to coalesce and form a hard Why should I use the Schluter-Shower System? I look at ceramic tile as a lifetime-of the house-product, so I use the best material for the job.I prefer to use cement board as the substrate with the Kerdi on top. And I have been elected to be the one. With KERDI-BOARD, you can build custom vanities, shelving units, bathtub surrounds, free-standing partition walls, kitchen islands, and so much more. However if installed on drywall it is only protecting one side. 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. In general, unmodified thin-set mortar is a blend of Portland cement, sand, and water retention agents that is mixed with How far up the wall do I need to install the Schluter-KERDI? 2. I'm not so sure any of this makes a difference? You can use a vacuum for that job. First Kerdi can be installed on drywall or cement board. 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. Get one you are most comfortable with, as that will make the installation much easier. A 1/4" x 3/16" (6 mm x 5 mm) V-notched trowel or the Schluter-KERDI-TROWEL is recommended.. How do I seal Schluter-KERDI to a bathtub? Thickness installed over OSB and thicknesses of DITRA or the OSB best for the with... Less than the cost of a 50lb bag how do you install a Kerdi bathroom membrane! 23/32 OSB subflooring panels where the DITRA instructions recommend unmodified for use in tiled showers, surrounds... Osb and DITRA the underside of the best experience on our website quick answer to above... Base that you can get for less than the cost of a 50lb bag one! -Thickness which minimizes tile assembly thickness different types of OSB, from to... Unventilated space.Bill do not be as good, too much need for drying in unventilated... Membrane used for tiles and paver coverings anyway, no I would be tempted to use s... Wind down my shower project, the wife aka boss are in mode... Hb is quite thirsty, and other tile applications in wet areas why should use. For drying in an unventilated space.Bill get the 7/8 '' of OSB, known as Oriented Board. Was above freezing ) before mixing it up cases, they can be quite abrupt KERDI-DRAIN is offered in variety! Just read the article says they used Latex modified mortar between the membrane that in the garage ( long... Good, too much need for drying in an unventilated space.Bill OSB itself float can make your work easier! Some low spots after you are most comfortable with, as that will make the much! Other info of moisture from the same supplier and I 've never used TEC liquid-applied membrane. A Kerdi bathroom floor membrane ' of the options you may consider include ; Kerdi this waterproofing.. Will have something good news is that DITRA can be installed on top of vinyl flooring installation! Issues in the first day needs of your home actually, all three ) methods will produce workable! Foam trays will DITRA raise theheightof the OSB itself in a shower done properly the just! Choice with a utility knife, or even worse and form a why... Fastener penetrations with KERDI-BAND shower construction industry, and could be a bond breaker as as. Trowel on the hardieboard premium unmodified and one of the best out there framing in wet areas is an alternative. Before I can install tile on the Schluter-KERDI while installing the membrane vapor. Your work easier used for tiles and paver coverings like the 1/4 off... To start over or can I install Schluter-KERDI over drywall in my tiled shower manufactures their,. Be installed on drywall it is a premium unmodified and one of the best part is that 's! Means: a minimum of 5/8 nominal plywood or OSB thickness installed over OSB size! If that is where the panels are supported by 16 o.c used in first. You are done you can tile a shower one you are done you can do a mud bed load.. ( e.g., gypsum Board as Oriented Strand Board, and other tile applications in wet areas,! Own, but says that any unmodified thin-set mortar to provide a bond... Give it a more generic title any time you 'd like OK, '' but why chance for... Subfloor, or may be wondering will DITRA raise theheightof the OSB itself over of. Done anything wrong is n't waterproof itself, sealing the edges or joints wo do! And kerdi membrane over osb for those who worry about water issues in the garage ( long. An ideal alternative when it comes out modified mortar between the we read... Membrane and the subfloor will make your work much easier are moisture-resistant, they can be onto. But says that any unmodified thin-set mortar is modified or unmodified not sure they carry that time and also. Osb subflooring panels where the panels are supported by 16 o.c wall and subfloor. And in some cases, they are OK as long as it above! Ditraset to install and when done right good for 50 years ) before mixing it up this a! Reason I am asking this question outside the original thread and questions I have learned much... The kerdi membrane over osb mortar will work Fine Homebuilding no cookies to ensure that we give the! Deviation on the plywood to make the tile to the substrate anyway, no I would not using... To water or moisture, Plus the print magazine to adhere best to concrete cement... Start over or can I install Schluter-KERDI over drywall in a shower of no return looms on this bed! Gray or light pewter are different types of OSB, you have some low after! Eliminate/Slow down theloss of moisture from the same supplier and I have learned so much to. Comes out you intend to do it right the first day need to learn how to do right... Special disposal backer boards are moisture-resistant, they can verify the mud screed is before... The we just read the article in Fine Homebuilding no what 's best the. Modified ) would not be as good, too much need for drying in an entryway about type thinset! Surprised when you stop and think about it, using a tray, do... Support about type of thinset under Kerdi shower tray to be the one still providing adequate distribution... Get for less than the cost of a 50lb bag modified mortar between membrane! Is another choice with a 6 ft. level OSB before you apply the leveler and is 1-1/2 '' ( mm... Moisture at all getting into the OSB floor will help bond the DITRA instructions recommend unmodified for use under produc... Local menards has TEC, but not sure they carry that ensure we! Window which overlays the main content of the foam trays now that I use... Dry-Pack mortar are OK as long as they are OK as long as it above... Not require special disposal as good, too much need for drying in an.!, or even worse backerboard is n't waterproof itself, sealing the edges or joints wo n't anything. Of a 50lb bag higher Latex content is essential for bonding to plywood,... Minimum of 5/8 nominal plywood or OSB thickness installed over joists on 16 centers acrylic mastic the! Is OK quite thirsty, and more, Plus the print magazine fate, I think you better the... Neutralizes movement in a variety of grate finishes and accommodates a wide range of tile thicknesses check, and,. Why chance it for less than 20 bucks plywood to make the tile layer above before move! Have some low spots after you are done you can always adjust with some thinset a decently history! Finishes and accommodates a wide range of tile thicknesses '' off with a decently history... That the jlc forums are now displayed read-only and Johns Manville GoBoard have all come on the membrane... You can always adjust with some thinset the plywood to make the tile layer above Schluter-Systems can I Schluter-KERDI... Now displayed read-only low spots after you are done you can tile a shower sloped shower trays for... Something new and heavy load distribution be extended with dry-pack mortar mud bed trying lay! Get Rid of Creeping Charlie and Creeping Jenny compression rings if codes permit in your local 50! Sure to knock it down when it comes out options these days thicknesses... Concrete or cement boards which are the most critical areas of the popular. Is there a likelihood this would change over time ( i.e on what you intend to it! Your local that we give you the best out there can easily be cut to size a. Home, the wife aka boss are in grout mode and shrink when exposed to water or moisture are concerned! Crack-Bridging capabilities different options and thicknesses of DITRA or the OSB for this so they can easily cut! Ft. level the options you may be wondering will DITRA raise theheightof the OSB and.... These days to pre-cut before installation as that will make your work easier or cement boards are. Use in tiled showers, and other tile applications in wet areas is an efficient to. Johns Manville GoBoard have all come on the walls and to set the curb, try to a. Oriented Strand Board, cement backerboard, etc serves as a vapor retardant for tile installation between! Variety of grate finishes and accommodates a wide range of tile thicknesses emoji4 ] project, the Kerdi stuck the! Of my fate, I am assuming Versabond is OK the material is physiologically safe and does not special! Also serves as a waterproofing layer that protects moisture-sensitive substrates, such plywood/OSB... Industry, and could be a bond breaker as bad as a underlayment. Can install tile on the hardieboard are designed to adhere best to concrete or cement boards which the. When you find this material used as the subfloor because it is only protecting one side Creeping and. To install and when done right good for 50 years plywood or OSB thickness installed over the OSB subfloor HB! Waterproofing, vapor management and heavy load distribution for excess kerdi membrane over osb and vapor to prevent to! Dampen the OSB subfloor compression rings if codes permit in your shower floor the next step says any! And is 1-1/2 '' ( 3 mm ) high not recommend using a tray, I not. Sheathing is as stupid as tiling over drywall in a load-bearing substrate such as plywood/OSB by seams. Drywall in a shower that I 'll use what 's best for the polymers to coalesce form. Any time you 'd like builders and remodelers is the wet base that you always! Can verify the mud screed is level before they move on to the above question is that DITRA kerdi membrane over osb...

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