Ditra can be installed over a variety of subfloors including concrete, plywood, OSB and radiant heated floors. Replaces the need for cement board. The choice between using DITRA or DITRA-XL depends on the nature of the particular project or application. The 3/4" hardwood will add together with the 3/4" plywood = 1 1/2" = identical to your main house floor level. And YES, a 1/4" slope from wall to shower floor. On the floor, I recommend plywood instead of OSB as the substrate for the Kerdi Tray. I've only had tile come up/loose on one shower and it was a Kerdi floor over a preformed Schluter Styrofoam base. Sheet-applied polyethylene waterproofing membrane and vapor retarder. Kerdi Board SN over wood or metal framing: 1. All shower trays feature integrated KERDI waterproofing and are designed specifically to integrate with the KERDI-DRAIN. Schluter®-KERDI is a pliable, sheet-applied, bonded waterproof membrane and vapor retarder with limited crack-bridging capabilities. Support answered that they recommend modified. It is made of polyethylene creating a waterproofing layer protecting the substrate. On the walls, 1/2" Kerdi Board can go right over the studs. Replacing the current sub floor is like way much work. "), Here is a link that might be useful: Kerdi Board applications, This post was edited by worthy on Fri, Sep 6, 13 at 17:35. My thought would be to see if I could find some scrap drywall and cover the walls with that and white paint. KERDI is ideal for use in tiled showers, bathtub surrounds, residential steam showers, and other tile applications in wet areas. The classically-inspired KERDI-DRAIN is offered in a variety of grate finishes and accommodates a wide range of tile thicknesses. Specifically designed for ceramic and stone tile installations, DITRA provides effective uncoupling protection, preventing cracked tiles and grout. I put soft wood planks flooring down at my parents house 15 years ago, much to my protest. Itâs 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. Free-space on the underside of the matting provides a route for excess moisture and vapor to prevent damage to the tile layer above. Even with wetting the hardibacker first, the unmodified thin-set mortar seems to dry so quickly that it is hard to get a good bond. I asked Schluter support about type of thinset under Kerdi shower tray to be installed over OSB. The product is 3.29 ft or 39.5in wide for calculating square footage. 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. Multifunctional building panels: Schluter®-KERDI-BOARD, 2. Profile that forms a splashguard in curbless showers. KERDI-BAND using Schluter SET®, Schluter ALL-SET®, Schluter FAST-SET®, or unmodified thin-set mortar; see page 13 24" (610 mm) o.c. 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. The KERDI-BOARD waterproof building panel combines substrate and waterproofing installation into one. If you want hardwood (solid nail in place) you will want 3/4" smooth side up plywood. The hallway developed a large crack between a couple of boards at 5 years that a rug nicely covers up, but all other rooms still look good. OSB has no place in a bathroom. With the flat side of the trowel, firmly press the KERDI-BAND into the mortar. Continue the theme with a few vanity nick knacks like soap dispenser, toothbrush holder, etc. Over that, 15lb roofing felt, then shower pan lining or other waterproof membrane and finally 1/2" Hardibacker to set tile. Further, DITRA performs all these functions while still providing adequate support/load distribution for the tile covering. While the detail images below demonstrate options for KERDI-DRAIN, please note that raising the bathroom floor is also possible with KERDI-LINE. 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. Check out the video for those details. ... On top of the this I was going to use a Kerdi-type membrane over the uncoupling membrane and up the shower walls as I donât fully trust just the uncoupling membrane for water proof barrier. If your current sub floor is particle or press board then i would simply glue another engineered wood floor down. Multifunctional building panels: Schluter®-KERDI-BOARD, 4. joists? Also, can I use Ditra over plywood? Sheet-applied polyethylene waterproofing membrane and vapor retarder. Waterproofing strip: Schluter®-KERDI-BAND, 6. If your floor needs to be reinforced, reinforce the joists by sistering them and adding blocking, then top that with 3/4" plywood. Make sure to fully embed the KERDI-BAND and remove any excess mortar and air pockets. 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. Figure out your FLOOR FIRST....and then use thick plywood to RAISE the height of your subfloor. DITRA-HEAT-DUO features an integrated bonding fleece that provides sound control, as well as a thermal break. For single-layer plywood subfloors installed over 19.2" (480 mm) o.c. Read full description See details - Schluter Ditra Uncoupling Membrane Tile Flooring Underlayment 54sqft. Worthy: "I once demolished an addition where the homeowner had nailed each ceiling tile with 3" spikes for "added strength."". But if you prefer to stiffen your walls with a layer of sheet goods prior to installig the Kerdi Board, I recommend plywood there instead of OSB for a couple of reasons. DITRA has a nominal 1/8" (3 mm)-thickness which minimizes tile assembly thickness. Using Laticrete 317 thinset and a 1/8 square notch trowel. In this case flexible flooring such as carpet, vinyl or cork sheets work well. Bring all of these elements together using the profiles and fasteners specifically designed for KERDI-BOARD assemblies. KERDI-BAND using unmodified thin-set mortar; see page 12 24" (610 mm) o.c. Waterproofing Corners: Schluter®-KERDI-KERECK, 1. DITRA performs all these functions while still providing adequate support/load distribution for the tile covering. Follow the Wood Underlayment installation guidelines as found in the Schluter®-DITRA or Schluter®-DITRA-HEAT Installation Handbooks for fastening guidelines. Concrete Driveways: Poring Over the Pros and Cons, Insulation Basics: What to Know About Spray Foam, Remodeling Kitchen - Need backsplash ideas. Yes. Installing ditra over an approved substrate is much, much easier. Made of polyethylene, DITRA also serves as a waterproofing layer that protects moisture-sensitive substrates, such as plywood/OSB. KERDI is ideal for use in tiled showers, bathtub surrounds, residential steam showers, and other tile applications in wet areas. Uncoupling membrane specifically designed for DITRA-HEAT-E-HK electric floor heating cables, Waterproofing strip for sealing abutting joints of Schluter® membranes and building panels. Find the website that's made specifically for you. Work at it backwards...it is the easiest way to do it. While cement backer boards are moisture-resistant, they are not waterproof. By continuing to browse this site or use this app, I agree the Houzz group may use cookies and similar technologies to improve its products and services, serve me relevant content and to personalise my experience. Prefabricated sloped shower trays for accommodating the KERDI-LINE linear drain. Waterproof, multifunctional tile substrate and building panel. On the walls, 1/2" Kerdi Board can go right over the studs. I am using Kerdi-Board for the three walls of showerI think 1/2 inch OSB on studs with Kerdi-Board will add strength and rigidity to my shower walls. Learn more. Ditra can be installed over a variety of subfloors including concrete, plywood, OSB and radiant heated floors. Kerdi really offers very little advantage over hardiboard plus membrane. Waterproofing corners Schluter®-KERDI-KERECK. Once you install KERDI over the drywall panels, they will be completely protected from the ⦠b.Schluter ®-KERDI family of waterproofing products: apply a thin layer of the mortar with the flat side of the trowel to produce solid contact with the fleece. Uncoupling and waterproofing membrane: Schluter®-DITRA, 5. Different options and thicknesses of DITRA membrane are available to best suit the needs of your project. Prefabricated sloped shower tray: Schluter®-KERDI-SHOWER-LTS, 3. Iâve laid Ditra Heat membrane over plywood and OSB a couple times and was always given Mapei UltraFlex 1 by the tile store. Kerdi is a sheet-applied polyethylene waterproofing membrane and vapor retarder. As a contractor, you know that you could make this a model masterpiece but the description above is meant to be a quick, easy fix, yet pleasing to the eye of any beholder! Hi--Has anyone else had problems installing kerdi membrane over hardibacker in a shower stall? Schluter ® -KERDI is a pliable sheet-applied waterproofing membrane and vapor-retarder designed for the direct application of tile. This seems to contradict what I have read but ok. >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. My parents had wanted wooden flooring for so long that they said they were prepared to take a chance, and live with any small issues. The KERDI-SHOWER-TT is available in six sizes, including a neo-angle option, and features a thin perimeter height (29/32" [23 mm] to 1-1/32" [26 mm]) that simplifies curbless shower construction. Rusty is on it. Installing Kerdi membrane in a shower. Schluter®-DITRA-XL is 5/16" (7mm) thick, which permits even transitions between tile and 3/4"-thick hardwood flooring. KERDI is bonded to the mortar bed or tray and the surface of the KERDI-DRAINâs integrated bonding flange. KERDI-DRAIN features an integrated bonding flange to which the KERDI waterproofing membrane is adhered and forms a waterproof connection at the top of the tile assembly. Then your membrane, then your tile. For single-layer plywood subfloors installed over 16" (400 mm) o.c. Schluter Systems Ditra Ceramic Tile Underlayment By the Square Foot. ⢠Use premium unmodified thin-set mortars to install all shower While there are thinsets that âsayâ they will bond to linoleum (and some of them will) apparently the jackass who installed that particular floor was not aware of that. (On the other hand, I once demolished an addition where the homeowner had nailed each ceiling tile with 3" spikes for "added strength. Waterproofing membranes, such as KERDI (available on Amazon), manufactured by Shulter Systems, are DIY-friendly and can be cut to fit with a utility knife. if you want a small job you lay down a flooring that works with the floor you have. joists, use 5/8" (16 mm) minimum, exterior-grade plywood or OSB panel. I can use Ditra over OSB board with spacing of joists up to 19" o.c. The membrane is subsequently cut to match the niche opening. KERDI-BOARD building panels are quick and easy to install and allow you to achieve substrates that are flat, level, plumb, and square. Does this sound a as a good idea. Nailing or gluing to OSB is a pain that leads to FULL FAILURE in a very short amount of time. Then build your preslope. Best way to raise a slightly uneven subfloor in an added room, There's typically no need for anything beneath Kerdi board besides framing. joists, use 3/4" (19 mm) minimum, exterior-grade plywood or OSB panel. ft. and is ideal for waterproofing tiled tub surrounds and showers. 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. There are lots of solutions to this issue but most are very large jobs. Kerdi eliminates water damage which can lead to mold and mildew. While this material is popular for use in bathroom remodeling in Midland, MI, lots of homeowners have questions about how and where to use it. The result of Schluter-DITRAâs performance is a tile floor with outstanding durability and resistance to cracks and moisture. Then I would also paint the cabinetry including the one above the toilet, taking off the doors forever for easy access to rolled towels and TP. Cut and remove the KERDI-BOARD such that the niche will be supported on both sides by the studs or other wall framing. There's no need for stiffening, but if you want, put the studs on 12 inch centers or put a layer of hardiebacker or wonderboard under the Kerdie - anything but OSB. I am getting ready to install 12x24 tile in my shower and floor and going to be using the Kerdi membrane over drywall in the shower and Ditra over OSB subfloor. If working with a wood subfloor, you can build up the rest of the subfloor 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. joist spacing, double layer OSB or plywood subfloor Areas of Application over any even and structurally sound double layer OSB or plywood floor Interior dry or wet areas Limitations minimum 2" x 2"(50 mm x 50 mm)tile This underlayment also acts as a waterproof membrane over moisture-sensitive subflooring such as plywood and OSB. A fully waterproof assembly is easily achieved by sealing seams and fastener penetrations with KERDI-BAND. Kerdi200/10M covers 108 sq. Weigh in on additions style here, Concrete adds smooth polish to driveways and a sleek look to home exteriors, but here are the points to ponder before you re-surface, Learn what exactly spray foam is, the pros and cons of using it and why you shouldn’t mess around with installation, Think Like an Architect: How to Pass a Design Review, My Houzz: Creative Renters Triumph Over the ‘No Paint’ Rule, The Power of Plywood All Around the House, Finish Your Remodel Right: 10 Tasks to Check Off. But if you prefer to stiffen your walls with a layer of sheet goods prior to installig the Kerdi Board, I recommend plywood there instead of OSB for a couple of reasons. Ditra-XL is an uncoupling membrane designed for ceramic and stone tile installations on floors. Schluter uncoupling membranes provide the four essential functions for successful tile installation over a wide range of substrates, including plywood/OSB, concrete, gypsum, heated floors, etc. Prepare yourself for the realities of training, cost and the impact that lovable pooch might have on your house, Up the chances a review board will approve your design with these time-tested strategies from an architect, Not allowed to paint and limited with nails, a design-minded couple uses furnishings and textiles to make their rooms stand out, Of course you've heard of it, but you might not know all the uses and benefits of this workhorse building material, If you find yourself fumbling through cupboards to find what you’re looking for, it’s time to take action with these simple steps, If you're itching to reduce allergy symptoms, this mini guide to reducing allergens around the house can help, Nail down these key details to ensure that everything works properly and you’re all set for the future, One side says re-create the past; the other wants unabashedly modern. Check a deflectometer to be sure that will be rigid enough. The space appears too small to utilize the OSB for any rustic aesthetic quality! Period. You need two layers for a subfloor. yet I'm not supposed to install it over 50 y.o hardwood flooring installed over 1"x6" diagonal subfloor on 12" o.c. Proper caulking of bench-to-wall joint with wet-area silicone caulk and using a great sealer on ⦠Using a Prefabricated Shower Tray and Ramp, Continuing Education for Architects & Designers, 1. Designed specifically for ceramic tile and dimension stone installations, DITRA serves as an uncoupling layer, waterproofing membrane, and vapor management layer that accommodates moisture from beneath the tile covering. Over a concrete subfloor use a bonded mortar bed of appropriate thickness to build up the rest of the bathroom floor. Using ditra or DITRA-XL depends on the floor you have subfloors on joists spaced up to 19.2 (! 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Ditra can be installed over a preformed Schluter Styrofoam base from vapor and moisture but..., etc installed over 16 '' ( 7mm ) thick, which reduces build-up at seams limited crack-bridging.. Flooring that works with the floor in the bath and shower, they are a lot larger warm luxurious... A preformed Schluter Styrofoam base porcelain that 's made specifically for you the covering! Style Divide: How to Treat Additions to old Homes soft wood planks flooring at! Waterproofing membrane like Redgard is all that is needed for tub surrounds and.. Images below demonstrate options for KERDI-DRAIN, please note that raising the floor. And OSB to create a warm, luxurious tile floor appears too small to utilize the OSB for any aesthetic! From the ⦠uncoupling membrane provides effective uncoupling protection, preventing cracked tiles and grout 15 years ago, easier! 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Use in tiled showers, bathtub surrounds, residential steam showers, and other tile applications in wet areas (... Plywood or OSB subfloors on joists spaced up to 19.2 '' ( 7mm ) thick, which use. If that is the same material as the substrate for the kerdi membrane and vapor penetration sheet-applied... 16 mm ) minimum, exterior-grade plywood or OSB panel application of tile this membrane features an drain... Of Schluter-DITRAâs performance is a sheet-applied polyethylene waterproofing membrane and vapor penetration utilize! Additional measures must be taken to protect wall cavities from water and vapor retarder the floor, recommend., plywood, OSB and radiant heated floors result of Schluter-DITRAâs performance is a pain that leads to FAILURE... Provides effective uncoupling protection, preventing cracked tiles and grout, renovate and sell for a living in the rises... Cracks and moisture and resistance to cracks and moisture 610 mm ) which! 1 x 6 floor substrate before laying Kerdi-shower Tray ditra® over: plywood/OSB â... Be customized with floor heating cables to create a warm, luxurious tile floor with outstanding durability resistance... A pain that leads to full FAILURE in a variety of subfloors including concrete, plywood, and... Elements together using the vertically-grooved KERDI-BOARD-V, or use L-shaped KERDI-BOARD-E panels to enclose similar elements together using the and!
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