is used that works with vinyl. You are treating this new plywood as your subfloor, you aren't counting the plank subfloor for anything in terms of deflection resistance strength. Simply running the trowel over the ditra will not do this. Spread a layer of thinset on the floor using a 1/4-inch notched trowel. The linoleum was glued to 3/4" plywood over a plank subfloor. This is the key to preventing the transmission of the movement that is the main cause of cracking in tile floors. It’s also a waterproofing layer. The manufacturer says the XL is better. Some limitations include the following: 1. We have the subfloor exposed now, and squeaking is pretty minimal. However, over concrete Schluter recommends an unmodified thinset mortar like the Ditra-Set shown here. 2. Hoping for some advice on a ceramic tile installation over 5/8 plywood subfloor on the second floor of our 1974 split level house. The same is true for other brands of decoupling membrane. 2. And my '07 manual shows a lack of backerboard in the sandwich. Perimeter bonded vinyl tile is unacceptable. I'm in the process of gutting my house and plan to install engineered hardwood over plywood, on top of the existing diagonal plank subfloor. If it is solid 2 x 6's then I would think the damage would be minimal. (Drywall screws are great for drywall but they're also very brittle.) I have removed the 2 layers of linoleum, but there is still significant paper backing and glue that's not coming off of the plywood. The area for this was cut out of the plywood underlayment, so the fiberboard was nailed directly into the plank subfloor. Tile should be set over a subfloor and underlayment that together are at least 1 1/8 inches thick. I picked up my Ditra roll yesterday, and after reading the handbook that came with the roll (extensively), I found out that Schluter looks to be okay with laying Ditra on top of the existing Vinyl floor as long as an appropriate latex p.c. Tile over osb subfloor floor. The wood is in good shape and the nails seem to hold well. Simply running the trowel over the ditra did that (photos 1 and 2). ... Upstairs i installed porclein tiles over Ditra on top of 1.125" plywood. Ceramic Tile Installation with Schluter Ditra. Or Ditra over structural plank subfloor (but that still calls for 24" o.c. You need an expert GC on this job who employs an expert tile mechanic. 3. Yes, alternate floor coverings may be installed over Schluter®-DITRA-HEAT or Schluter®-DITRA-HEAT-DUO. I believe he needs to beef up the sub-floor with 1/2" ply screwed/glued down over … Tiling over a plank subfloor. I might as well screw the planks into the joists while I have it up and prep it before laying down the OSB. It is made of polyethylene creating a waterproofing layer protecting the substrate. Butting the ends of the plywood at the quarter-point span is still recommended? joist spacing 6 Floors, Interior – Natural Stone Tile 7 Floors, Interior – Existing Vinyl 7 Floors, Interior – Structural Plank Subfloor 8 Floors, Interior – Ceramic or Stone Tile 9 Floors, Interior – Ceramic or Stone Tile 10 Floors, Interior – Ceramic or Stone Tile 11 MOVEMENT JOINTS Placement guidelines and descriptions I like that it is only 1/8" thick but its not my battle. Joists are 2X8, 16 in. We are preparing to remodel our master bathroom (ourselves) and I'm reviewing some subfloor options for tiling. The Schluter®-DITRA-HEAT system is suitable for applications with engineered wood, vinyl, wood plastic composite (WPC), luxury vinyl tiles (LVT), luxury vinyl planks (LVP), stone plastic composite (SPC) tiles and planks, and laminate flooring. I say 11.5-12 because I never took the whole floor up to measure, and the This isn't a simple job. 2. Posted by 1 day ago. Schluter has updated their installation instructions to allow for alternate floor coverings to be installed over Ditra-Heat and Ditra-Heat DUO membrane. The problem is I only have enough room to install 1/4 ply over the existing subfloor. It is mortared to the DITRA underlayment, which in turn, is mortared to the subfloor. Foxtail brush ; Utility knife; Chalk line; 1/8″ notched trowel; Flat trowel; Grout float; Buckets (for mortar) Corded drill & mixing paddle; How to Install DITRA. Anyhow that is the point I am at now (cement board thin set on top of 3/4inch plank subfloor). There was also a metal ember strip under this board. I never knew flooring took so much prep work. Tiling over a plank subfloor. On new wide-plank pine boards in a ca. This combination will only make your floor 1/2" thick over the planks and will be as or more effective than 1/2" ply and backer. The joists are 16" OC and the planks are around 1x6. You're going to get some damage to the sub-floor trying to remove anything that is cemented to it. All good things! Ditra is a polyethylene uncoupling underlayment with a grid Ditra is an uncoupling membrane designed for ceramic and stone tile installations on floors. Once I do that I'll have 3/4" to work with as that's the height of the original hardwood floors over the plank subfloor in the adjacent rooms. It was in random plank boards where that was felt. In fact, nearly every bare substrate you find in a modern house would be considered an approved substrate – shiny linoleum is not one of them (Photo 3). Walking on it is like concrete AND the Ditra will prevent cracking of the tiles and grout when the plywood expands and contracts. CONTENTS WOOD 4 Floors, Interior - 16, 19.2, & 24-inch o.c. The joists were in really good condition and didn't have bounce noticeable or much deflection. DITRA is a polyethylene tile underlayment manufactured by Schluter Systems. If so, how thick? Then, to minimize the height build up, you can do an uncoupling membrane like Ditra. That's necessary when attaching to sheet goods, but with your dimension wood floor you are only technically required 3/4" penetration. Consensus here is that the Ditra goes back to Home Depot, be it fear of the unknown, resistance to change or valid concerns. Another alternative is to resecure your plasnks to the joists, fasten a lyer of 3/8" ply over the planks and then use Ditra as your underlayment. I've already re-fastened the t&g planks to the joists to ensure they're solid using screws. The TCA-150 calls for 1/2" underlayment, but that's also assuming it's over a 5/8" plywood subfloor. Then DITRA over the top, and lay your tile. That pretty much leaves deciding on either 5/16" or 1/2" Durock. OC. We live in a late 1970s home in which the subfloor is .75" x 9.25" (actual dimension) planks WITHOUT tongue and groove. For example: The extra layer can give you peace of mind that your tile won’t crack and that water won’t get through to your subfloor. Multiple layers of vinyl is unacceptable . 01-03-2015, 04:37 PM. Normal application with just 3/4" I would squirt down some construction adhesive to the joists, lay the 3/4" layer and screw 8" on edges and 12" in the middle. While Ditra over cement board doesn’t make logical sense in most scenarios, there are some reasons you might want to go ahead and do both. See page 17 & 18 of the 2020 Ditra-Heat Installation Handbook. Glue and screw this underlayment in place. Yes, Schluter®-DITRA or DITRA-XL can be installed over vinyl. Our bathroom had hardwood flooring, and you can’t lay Ditra directly on top because solid wood shrinks and swells with temperature and humidity changes. Then I went over the entire floor, countersinking nails, removing padding staples and filling any large gaps or unwanted holes with wood filler. For instance, to install DITRA over plywood, a modified thinset mortar should be used. Has anyone ever laid the ditra membrane over the existing vinyl floor? That'll leave room for the subfloor + tiles. I tore out tile over 1/4 ply, over stick down vinyl, over sheet vinyl, over MDF. My plan had been to replace the fiberboard with 1/2 ply, and then do a ditra installation (1/4" modified thinset, ditra, 1/4" unmodified thinset) for some 12"x12" porcelain tiles (3/8" thick). Can Schluter®-DITRA and Schluter®-DITRA-XL be installed over vinyl flooring? Interestingly, tile installers have been using sand for thousands of years as a non-rigid layer of material between the substrate and the tile to prevent cracking. Not every situation encountered in the field will be covered in complete detail in the TCA guidebook. Also complicating the issue is that the plywood was placed AFTER the baseboard, meaning that now that I've removed the baseboard, there is a 3/4" gap between the plywood and the walls. If your joists are 16" on center and you can use 5/8" plywood, you may end up as little as 1/4" higher than your hardwood. I'm going to install 3/4" plywood underlayment over the original 3/4" thick x 3 1/4" wide t&g plank boards which are attached to 2" x 8" joists on 18" centers. Description mapeguard um is a premium performance lightweight … Use a construction adhesive like PL400 and real wood screws. Re: Installing tile over diagonal solid subfloor Even if the 1x10 is a true 1" I don't believe it will be sufficient. Thank you for the replies! Schluter Ditra and Redgard Uncoupling Mat are two popular brands of tiling membranes that lessen the chance of concrete events becoming tile events. Joists are 11.5-12 footers; however, they do have some bearing on top of partition walls below. It’s an uncoupling membrane that isolates movement between the subfloor and finished tile, preventing cracks over time. Schluter Ditra 1/8" Underlayment 323sqft in Underlayments. I purchased ditra which I intended to put down over the cement backerboard. I want to install 12" porcelain tile with ditra on our foyer. Large format natural stone needs a subfloor over twice as stiff as for wood flooring. Close. My main question here is about how to secure to the joists. It provides uncoupling to prevent cracked tile and grout. In an old house, you'll almost certainly need to add a layer of plywood to the plank subfloor. As it stands now, we'll have 1/2" plywood underlayment over the 1x6 plank subfloor. Photo 3. I 'm now down to the subfloor which is 1/2 ply. Possible Benefits of Installing Ditra Over Cement Board. On all our jobs where we use Durock for floor tile we install 1-1/8" Advantech with joists 16" OC. If they need support, which is highly likely, then when the subfloor is open is the time to install it. Cushioned vinyl is unacceptable. joist spacing Floors, Interior - Natural Stone Tile Floors, Interior - Existing Vinyl Floors, Interior - Structural Plank Subfloor CONCRETE 8 Floors, Interior - Ceramic or Stone Tile • Young concrete Installing tile over a wood subfloor is a lot easier today than it was when i started my remodeling career. The underlayment will be Ditra. You can also use an uncoupling membrane over existing tiles or on a plywood subfloor, but Schluter Systems does not recommend using DITRA over existing hardwood, which is too smooth to grip the thinset. CONTENTS 4 Floors, Interior – 16, 19.2, & 24-inch o.c. Installing Tile Directly on Concrete Ceramic and porcelain tile are so frequently installed at or above grade level on a cement board underlayment or directly on plywood that it almost seems novel to install tile directly on concrete. 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