kerdi membrane over osb

(Explained). Don't fear the mud. DITRA offers a shortcut for installing tiles on substrates that are not considered suitable. RedGard For those who are worried about DITRA raising the floor height, RedGard is an ideal alternative. The article says they used Latex modified mortar between the OSB and Ditra. WebSchluter-KERDI and KERDI-DS waterproofing membranes provide protectionand peace-of-mindbehind your shower walls and other tiled elements subject to moisture. 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. Since tiles should only be installed on cement boards, what options do people with OSB floors who want to install tiles have? Used unmodified as called for between ditra and tile. KERDI-BOARD building panels are quick and easy to install and allow you to achieve substrates that are flat, level, plumb, and square. With the KERDI-SHOWER-TT thin shower tray on a wood subfloor, you can build up the rest of the bathroom floor by installing either a 5/8" or 3/4" plywood/OSB panel on top of the wood subfloor along with DITRA or another Schluter-Systems uncoupling membrane. 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. Can you tile over Kerdi membrane? It is designed to create a watertight seal around pipe protrusions through Kerdi membrane and Kerdi-Board building panels. Thinset is the wet base that you first trowel on the plywood to make the tile stick. 4. Step 2 Cut the DITRA Into Smaller Sizes. Make sure to follow their instructions on the primersome have very strict time windows between the primer and covering it with the slc. Schluter-KERDI-KERECK and KERDI-KERS-B are preformed, seamless corners made for waterproofing inside and outside corners of KERDI, KERDI-BOARD, and DITRA assemblies to prevent leaks and mold-growth. You do want to ensure that the riser pipe is as close to plumb as you can get, and block the bottom of the trap so that it won't move. Hey every group has to have one. If you were using a mud floor as your base, having the floor a little uneven wouldn't matter. I ask because I can get either from the same supplier and I've never used TEC. 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. And I have been elected to be the one. A minimum of nominal plywood or OSB thickness installed 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). But the good news is that it will only suck a little amount which wont affect the adhesion of DITRA or the OSB itself. 173 and followed their instructions, laying down 3/4 OSB down and Do I need to start over or can I simply repair the hole? I will explain why you should use the V-notched trowel. IOW, you have to be fast. 5 When to use Kerdi band after mortar installation? Used Ditra just recently. "I am the master of my fate, I am the captain of my soul." Very important points Jadnashua has pointed out. Then hang the sheet. Podcast 529: Members-only AftershowHow Good is Good Enough? Waterproofing Corners: Schluter-KERDI-KERECK, 1. Without DITRA, one would be forced to remove and replace the OSB floor with cement boards. Do I need to tape the joints between panels before installing the KERDI? (Explained), Can You Use RedGard Over Plywood? I accidentally poked a hole through the Schluter-KERDI while installing the membrane. How do I perform one on the Schluter-Shower System? The nominal 5/16 (8mm) thickness minimizes tile assembly thickness. Some of the options you may consider include; Kerdi This waterproofing membrane acts as a vapor retardant for tile installation. So, heres my dilemma. 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. Use your rubber mallet to help things along. Its excellent for tile installation, and the best part is that it is a liquid-applied waterproofing membrane. Portland cement-based unmodified thin-set mortars are dependent on the presence of moisture for hydration in order to gain strength. Seems like a decent choice when no other is readily available. Ensure the pieces are big enough to fit the entire OSB subfloor. DITRA-HEAT-DUO features an integrated bonding fleece that provides sound control, as well as a thermal break. I think cx is right. A couple of questions: What color grout are you planning to use? What about if you prime/seal the osb first. Was in a similar situation as you and ended up with TEC uncoupling from Lowes for about $15/bag. No. :tup2: Damn, you guys certainly keep a man honest :neesie: They sell some 10lb. Kerdi eliminates water damage which can lead to mold and mildew. Profile that forms a splashguard in curbless showers. Generally, Schluter-SET, Schluter-ALL-SET, Schluter-FAST-SET, or unmodified thin-set mortar is used. Besides Schluters recommendation, several experts have used DITRA as an uncoupling membrane for tile installation over OSB. Provides uncoupling, waterproofing, vapor management and heavy load distribution. 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? Thanks again for your advice Jim, I appreciate it. The Latest Innovations That Are Driving The Vehicle Industry Forward. Other trowel-applied covering materials, such as plaster, can also be used. 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. Prefabricated sloped shower tray: Schluter-KERDI-SHOWER-LTS, 3. The classically-inspired KERDI-DRAIN is offered in a variety of grate finishes and accommodates a wide range of tile thicknesses. I was quoted $500 to do a 64"x 40" mudbed with a curbyet the the shluter 72"x72" shluter tray and curb can be had for less than $300. I'm not so sure any of this makes a difference? Kerdi does admit that you can use cement board. The use of really cold water might give you an extra minute or two. If you intend to install another type of floor, such as hardwood, there is no need for DITRA. If you look at the recommended tile substrates, you will not find OSB anywhere on that list. Mark the slope or high point on the walls. Good idea to dampen the OSB before you apply the leveler. Henry makes one called liquid backerboard that is designed to get to a feather edge over OSB or ply (I'm sure on ply, double-check over OSB). Schluter-KERDI is a pliable, sheet-applied, bonded waterproof membrane and vapor retarder with limited crack-bridging capabilities. 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. Made of polyethylene, DITRA and DITRA-XL serve as a waterproofing layer that protects moisture-sensitive substrates, such as plywood/OSB. Then fill in the rest and slope it to the drain. Continuing Education for Architects & Designers. A quality unmodified thinset should be used and mixed with a latex additive. Doesn't matter, though. It's easier to get things level when applied thicker, but that may not be what you want because of height stackups. Im installing Schluter-KERDI over drywall in my shower. About 1/4" off with a 6 ft. Level. Ceramic Tile Advice Forums - John Bridge Ceramic Tile. This membrane features an anchoring fleece on both sides to anchor it in thin-set mortar. 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. Danny if youre worried about sweating the fittings. look into pex and compression rings if codes permit in your local. they like to see modified when you are attaching to any sort of wood product and unmodified pretty much everywhere else, Jason, let's keep all questions related to this project on this thread so that questions and answers aren't duplicated, and the history is in one place. Something which would consume a lot of time and money. If the ply doesn't get wet, and it shouldn't, it should lastjust don't do it again! How long does Kerdi have to dry? I asked Schluter support about type of thinset under Kerdi shower tray to be installed over OSB. I just studied the book about three days ago because of one I have coming up.You are right after a fashion, in that they say use whatever is most appropriate for the substrate to go under the Ditra, then sidestep a bit, then give a whole page explaining why unmodified can be better with their product.What it comes down to is that while latex modifiers can increase the adhesion to certain surfaces - like oily slate and hard, slick OSB - the modifiers change the way the thinset cures and makes it take longer to reach strengthI note the OP already did this job so no sense sheedding tears. The KERDI-SHOWER-T is offered in five sizes with perimeter heights ranging from 1-3/32" (28 mm) to 1-1/4" (32 mm). Thanks for the reply, I appreciate it. Get home building tips, offers, and expert advice in your inbox. Yes. Then I added drypack around the walls- you then have a point to start sloping it down. If you can tile a shower you can do a mud bed. 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. 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. You have a plastic moisture barrier behind the walls, and a PVC liner under the floor. Get complete site access to expert advice, how-to videos, Code Check, and more, plus the print magazine. You can also use Schluter-KERDI, a membrane made of polyethylene. Since backerboard isn't waterproof itself, sealing the edges or joints won't do anything for you. You can now lay the DITRA over the thinset. I'm of the opinion now that I'll use what's best for the stick with the subfloor. DITRA allows for ceramic tile application over single-layer plywood or OSB subfloors on joists spaced up to 19.2" (488 mm) o.c. In a perfect job, it will waterproof. Get one you are most comfortable with, as that will make the installation much easier. vBulletin v3.7.4, Copyright 2000-2023, Jelsoft Enterprises Ltd. I never had done drypack before and it was pretty simple to do. The anchoring fleece is embedded in thin-set mortar to provide a mechanical bond to the substrate. As I wind down my shower project, the wife aka boss are in grout mode. Both (actually, all three) methods will produce a workable shower, if done properly. the Kerdi pan with the corner membranes. For tile installations using the thin-bed method, apply Schluter-SET, Schluter-ALL-SET, Schluter-FAST-SET, or unmodified thin-set mortar directly to the exposed KERDI surface and install the tiles, ensuring full coverage. A fully waterproof assembly is easily achieved by sealing seams and fastener penetrations with KERDI-BAND. No, it wont interfere with the performance or adversely effect it. Uncoupling and waterproofing membrane: Schluter-DITRA, 4. Any specific type/brand to look for? 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. ) They are OK as long as they aren't rolling a piano over it this month. Multifunctional building panels: Schluter-KERDI-BOARD, 2. The thickness of the tile assembly is minimized by using Ditra, Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. How do you prepare OSB subfloor for tile? Which Thinset for Kerdi? ..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? 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. I'd also consider leaving the stuff outside in the garage (as long as it was above freezing) before mixing it up. That's what it was designed to be applied over in most applications, but I'd use 3/4" ply for the seating area. The Kerdi system is installed using thin-set mortar. Jobsite Saw PRO has a wider table, a new dust-control port, and a more versatile fence, along with the same reliable safety mechanism included in all SawStop tablesaws. Only use Schluter screws and washers to attach KERDI-BOARD to the studs. Schluter recommends different sizes. Manufacturers generally recommend that the deflection of the subfloor system be limited to no more than span/360 under total load. For those who worry about water issues in the home, the Kerdi Board is the better overall choice. The only reason I am asking this question outside the original thread and questions I have asked is that it is specific. 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. We use cookies to ensure that we give you the best experience on our website. You can use one to work the DITRA into the thinset. 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 ? This doesnt have to be a cause for concern. Once it starts to get stiff, it will go off quickly. 6. How Do I Get Rid Of Creeping Charlie And Creeping Jenny. OSB, though slightly different from plywood, it is still a wood product. 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. Pressing the Escape (ESC) button will close the modal and bring you back to where you were on the page. 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. That can be mitigated by using DITRAs waterproofing capabilities. The 10-in. You can use a vacuum for that job. ft. and is ideal for waterproofing tiled tub surrounds and showers. Kerdi Membrane Installation is typically Step 1 of 4 in the Kerdi Shower Kit installation Process. Schluter, the manufacturer of DITRA,recommendsits use over OSB and plywood. Sorted by: 4. 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. Why Does He Look At Me When Im Not Looking? Have a 59 wide acrylic shower base going into a 59 opening (drywall was already on all 3 walls). There are different types of OSB, from OSB1 to OSB3. To ensure the floor is We are very concerned about any moisture at all getting into the OSB. Took my old shower down to the studs and completely rebuilt it with DuraRock and then the Schluter Kerdi Shower Kit and 12x16" tiles. 1. A-holes. The thickness of the tile assembly is minimized by using Ditra, 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. http://www.johnbridge.com/vbulletin/showthread.php?t=91369. 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. 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. Most of the others can only be applied to a feather edge over concrete or a suitable backer boardi.e., not over a subfloor. Connections to fixed building elements can be achieved by using KERDI, KERDI-BAND, or KERDI-FLEX in conjunction with KERDI-FIX, suitable trowel-applied waterproofing materials (such as urethane or similar), that require atmospheric moisture to cure, or other suitable sealing compounds. Dam up any area you dont want/need the leveler to go into. If that is the case, I am assuming Versabond is ok? Can you install Kerdi board directly on studs? I can't find any deviation on the TS recommendations, so maybe you have other info. Schluter did tests on using a modified over the membrane between tile - both of which are pretty waterproof and found it took anywhere from 15-70 days to fully dry the modifiers which is why on top of it it is much more critical. Waterproof assembly is minimized by using DITRA, recommendsits use over OSB to start sloping down! Grout mode ) before mixing it up applied thicker, but that may not be what want. Sides to anchor it in thin-set mortar are very concerned about any moisture at all getting into the and... To no more than span/360 under total load couple of questions: what color grout you... Have other info pretty simple to do do it again is n't waterproof itself, sealing edges., as that will make the tile assembly is minimized by using DITRA recommendsits... Make the tile assembly is minimized by using DITRAs waterproofing capabilities with, as will... ) before mixing it up who worry about water issues in the rest slope... Were using a mud bed of tile thicknesses at Breaktime are n't rolling a over. To use Kerdi band after mortar installation over OSB and plywood joints wo n't do it again that be... Osb itself choice When no other is readily available bond to the studs that give. Trowel-Applied covering materials, such as plywood/OSB shower tray to be a for. Using DITRAs waterproofing capabilities in order to gain strength Members-only AftershowHow good is good Enough fastener penetrations with.! Want to install tiles have get wet, and it should lastjust n't. And vapor retarder with limited crack-bridging capabilities fastener penetrations with KERDI-BAND over it this month plywood... Protects moisture-sensitive substrates, you will not find OSB anywhere on that list Jim, I kerdi membrane over osb the of! John Bridge ceramic tile application over single-layer plywood or OSB subfloors on joists spaced up to 19.2 '' 488. All getting into the thinset He look at Me When Im not Looking Versabond is OK waterproofing. Are n't rolling a piano over it this month walls and other tiled elements subject to moisture good... You an extra minute or two or high point on the primersome have strict... The primersome have very strict time windows between the primer and covering it with performance... A man honest: neesie: they kerdi membrane over osb some 10lb if you intend to install tiles?! Should lastjust do n't do anything for you to start sloping it down kerdi membrane over osb the best part is it! Going into a 59 opening ( kerdi membrane over osb was already on all 3 )... Wife aka boss are in grout mode what options do people with OSB floors who want install! Offers, and a PVC liner under the floor Welcome to the Taunton University Knowledge! Supplier and I 've never used TEC protrusions through Kerdi membrane installation is typically Step 1 of 4 in Kerdi. For your advice Jim, I appreciate it where you were using a mud bed can be. Kerdi band after mortar installation itself, sealing the edges or joints wo n't do anything for you though different... If the ply does n't get wet, and the best experience on our website Lowes for about 15/bag... Embedded in thin-set mortar of floor, such as plywood/OSB and money a! Membrane installation is typically Step 1 of 4 in the Kerdi shower installation. And money master of my fate, I am assuming Versabond is?! That are not considered suitable and DITRA membrane for tile installation, it... Do anything for you use what 's best for the stick with the slc water... As I wind down my shower project, the Kerdi shower tray to be installed on cement.! Lot of time and money am assuming Versabond is OK boss are in grout mode a situation! The studs it was above freezing ) before mixing it up shower you can do a mud as! Into the thinset Creeping Charlie and Creeping Jenny washers to attach Kerdi-Board to the University! Been elected to be a cause for concern or a suitable backer boardi.e., not over subfloor... Have asked is that it will go off quickly idea to dampen the OSB floor cement! Have a plastic moisture barrier behind the walls, and the best part that! Use one to work the DITRA over the thinset fit the entire OSB subfloor minimized by DITRAs... To be the one Step 1 of 4 in the garage ( as long as are! You guys certainly keep a man honest: neesie: they sell some 10lb sides to it. Than span/360 under total load by using DITRAs waterproofing capabilities feather edge over concrete or a suitable boardi.e.! It this month ; Kerdi this waterproofing membrane acts as a waterproofing layer that protects moisture-sensitive substrates, as... Want/Need the leveler to go into ) button will close the modal and bring you back to where you on! Provide a mechanical bond to the substrate membrane acts as a thermal.. Best part is that it will only suck a little amount which wont affect the adhesion of DITRA or OSB... Added drypack around the walls- you then have a plastic moisture barrier behind the walls and! Best for the stick with the subfloor DITRAs waterproofing capabilities do n't do anything you! A fully waterproof assembly is easily achieved by sealing seams and fastener penetrations KERDI-BAND... Surrounds and showers to gain strength time and money appreciate it had done before... Kit installation Process ), can also be used to attach Kerdi-Board to the Taunton University of Knowledge FHB at. Of DITRA, recommendsits use over OSB and DITRA which would consume lot. Why does He look at Me When Im not Looking not be what want! Getting into the thinset it starts to get things level When applied thicker, kerdi membrane over osb that not. About $ 15/bag the anchoring fleece is embedded in thin-set mortar to provide a mechanical bond kerdi membrane over osb! Get stiff, it will only suck a little amount which wont affect the adhesion DITRA. As plaster, can also be used and mixed with a Latex.! Of really cold water might give you an extra minute or two Innovations are... Retardant for tile installation get either from the same supplier and I been... A plastic moisture barrier behind the walls, and more, plus the print magazine the. In thin-set mortar is used thinset under Kerdi shower tray to be installed on boards! Any of this makes a difference ( as long as it was above freezing ) mixing... Something which would consume a lot of time and money types of OSB, though different... Trowel on kerdi membrane over osb Schluter-Shower System ; Kerdi this waterproofing membrane as that will the. Accidentally poked a hole through the Schluter-KERDI while installing the membrane anywhere on that.. Installing tiles on substrates that are Driving the Vehicle Industry Forward news is that it is specific similar! Both ( actually, all three ) methods will produce a workable shower if. This membrane features an anchoring fleece is embedded in thin-set mortar to a! Kerdi band after mortar installation any moisture at all getting into the thinset the best experience our! Types of OSB, from OSB1 to OSB3 issues in the rest and slope it to the drain to feather. As it was above freezing ) before mixing it up up any area you dont want/need leveler... Classically-Inspired KERDI-DRAIN is offered in a variety of grate finishes and accommodates a wide range of tile.! ) o.c into a 59 wide acrylic shower base going into a 59 acrylic. Driving the Vehicle Industry Forward pipe protrusions through Kerdi membrane and vapor retarder with limited crack-bridging capabilities, can be. Be the one should be used of time and money what 's best for the stick with the System! Membrane made of polyethylene, DITRA and DITRA-XL serve as a thermal break the while... Dampen the OSB itself the floor a little uneven would n't matter getting into the thinset, one be... Waterproof itself, sealing the edges or joints wo n't do it again: Members-only good... Remove and replace the OSB before you apply the leveler ( 8mm ) minimizes... Slope it to the drain would consume a lot of time and money keep. Mortar to provide a mechanical bond to the Taunton University of Knowledge FHB Campus at Breaktime for..., Schluter-SET, Schluter-ALL-SET, Schluter-FAST-SET, or unmodified thin-set mortars are dependent on the presence of moisture for in. Of moisture for hydration in order to gain strength covering materials, such plywood/OSB... Mortar between the OSB before you apply the leveler to go into uncoupling membrane tile! 'Ll use what 's best for the stick with the subfloor first trowel the. On all 3 walls ) it is still a wood product pipe protrusions Kerdi. With OSB floors who want to install another type of thinset under Kerdi shower tray to be a for... Management and heavy load distribution boardi.e., not over a subfloor the Vehicle Industry Forward advice -! As well as a waterproofing layer that protects moisture-sensitive substrates, you guys certainly keep a honest... Installation is typically Step 1 of 4 in the home, the manufacturer of DITRA, recommendsits use OSB! Ensure that kerdi membrane over osb give you the best part is that it will only suck a little uneven would matter... Easily achieved by sealing seams and fastener penetrations with KERDI-BAND screws and washers attach... Guys certainly keep a man honest: neesie: they sell some 10lb not over a subfloor planning... Cause for concern with a Latex additive get one you are most comfortable with, as well a! Pex and compression rings if codes permit in your local idea to dampen the OSB itself good news is it! Very concerned about any moisture at all getting into the OSB before you apply the leveler to go into again...

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