Unmodified vs modified. The type of thin-set mortar used to install DITRA depends on the substrate material. Backerboard does not shrink or expand when it comes into contact with water (mortar and grout both contain water). The type of thin-set mortar used to install DITRA depends on the substrate material. The type of thin-set mortar (modified vs. unmodified) used to install DITRA depends on the substrate. Modified thinset is much stronger and flexible than regular thinset but it … This is a requirement. I want this to last so money is no object when coming to preperation. – to this two-layer plywood base and you will have one of the best substates available for thinset ceramic tile. Does the thinset move out of the mechanical slots. Ready-to-use … or plywood sub floors. 19.2 inch on-center joist spacing with single layer … For example, to set DITRA over plywood or OSB, a modified thin-set mortar meeting the requirements of ANSI A118.11 is used. … For this project, the DITRA is being installed over radiant-heating element embedded in self-leveling mortar. Since thinset tile mortar has … Backerboard can double the thickness of an installation, which can be troublesome in some locations. Ditra is now the leader in monetary sales, which reached $54 million in the United States in 2007. Again, I've tiled over Ditra with modified thinsets, but I'd not recommend doing that with large format. I moistened the plywood, put down Thin set with a 1/4 by 3/8 trowel. or Plywood substrate. So if you use modified thinset between Ditra and your tile, it can't dry properly. Thinset mortar selection. Layout DITRA. 5in. Premium Mortar. Made of polyethylene, DITRA and DITRA-XL serve as a waterproofing layer that protects moisture-sensitive substrates, such as plywood/OSB. The modified thinset mortar is used to attach the Ditra Mat to the Shed floor O.S.B. IME. Traditional versions are cement-based powders that are mixed with water prior to application. Shop Schluter Systems All-Set 50 Pound(s) White Powder Thinset mortarundefined at Lowe's.com. Most tiles are approved for installation over solid plywood floors, but before you can spread the thinset and lay the tiles, you have to prepare the plywood to make sure it is compatible with the adhesive. Please consult the Schluter-DITRA Installation Handbook before beginning your tile project to confirm the proper materials selection. Instead, use Laticrete 317 or 272 (even better) with full strength 333 latex (expensive but worth it) to bond the Ditra to the plywood. Photos 3 and 4 had an unapproved substrate and, apparently, incorrect thinset (and a shitty tile job, but that’s a whole other post). I looking for opinions on what is the best brand and type thin set for this application. To set DITRA over concrete or gypsum, Schluter-Systems recommends an unmodified thin-set mortar meeting the requirements of ANSI A118.1. For instance, to install DITRA over plywood, a modified thinset mortar should be used. Bucket. So in your case, use modified under the Ditra to bond it to the subfloor, and use unmodified on top of the Ditra … You can get it at home depot. To set DITRA over concrete or gypsum, Schluter-Systems recommends an unmodified thin-set mortar meeting the requirements of ANSI A118.1. I am asking if I can lay 2nd layer of plywood over Planipatch so I can get a clean, plywood only install for DITRA-HEAT mat install. One thing you’ll need to pay attention to is using the proper type of thinset mortar: For installing the Ditra membrane: over plywood or OSB – use MODIFIED Thinset mortar. For example, to set DITRA over plywood or OSB, a modified thin-set mortar meeting the requirements of ANSI A118.11 is used. Designed by myThem.es. As I mentioned before it works just fine. It should meet ANSI 118.15 as a minimum. To set DITRA over concrete or gypsum, Schluter-Systems recommends an unmodified thin-set mortar meeting the requirements of ANSI A118.1. I am using the Ditra uncoupling membrane for the first time for a small (100 square foot) tile job. Jim and Rich unrolled sections of DITRA, cutting it to length with a utility knife. Ceramic Wood Look Floor Tiles With wood look tile, you can now get the look of a traditional wood floor with the durability of tile. This thinset removal bit was very fast at removing the thinset from a plywood subfloor without damaging the plywood. The anchoring fleece on the underside of Schluter-DITRA-XL is thin-set mortar DITRA or DITRA-XL interior dry or wet areas uncoupling membrane Schluter ALL-SET®, Schluter FAST-SET®, or modified thin-set mortar Single layer of plywood or OSB Joists, I-joists, or trusses 16" (406 mm) o.c. Correspondingly, can you mix modified and unmodified thinset? Ready-To-Use Mortars. For example, to set DITRA over plywood or OSB, a modified thin-set mortar meeting the requirements of ANSI A118.11 is used. Schluter ®-DITRA and DITRA-XL are specifically designed for ceramic and stone tile installations.DITRA and DITRA-XL provide uncoupling to prevent cracked tile and grout. DITRA or DITRA-XL interior dry or wet areas uncoupling membrane Schluter ALL-SET®, Schluter FAST-SET®, or modified thin-set mortar Single layer of plywood or OSB Joists, I … And if you use a thinset approved for that substrate, there are no problems at all. 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