They show demo's on trying to separate this stuff during the class and there is just nothing to worry about. The type of thin-set mortar used to install DITRA depends on the substrate material. Is one better … Is one better … i think most tile guys would use modified but either one would work. Thinset Decoded: Which is the best thinset to use for Ditra, Kerdi, porcelain tile, floors, large tile, wood look tile, and showers. However, the unmodified thinset needs to be used between the membrane and the tile Schluter has said that if you use a modified thinset to set the tile that you can have to wait as long as 7- 10 days JUST TO GROUT. Ardex and Schluter work together as a team in Europe and now should be fine, ditra mats require modified mortar under the mats when going over wood subfloor with a 1/4 x 1/4 inch trowel, unmodified on top. Over prim-grip you want a modified thinset to bond ditra, not unmodified. I have Un-modified for the Tile to Ditra, but I may need special for the large Porcelain tiles? It can be installed over a variety of Ditra-set is priced right. Not sure if enough force was used to get a solid layer of thinset into the Ditra Heat mat so there was not any voids/air spaces under the tile. What type of thin-set mortar should I use when setting tile over Schluter, Using a Prefabricated Shower Tray and Ramp, Continuing Education for Architects & Designers. The only time I use modified thinset is when applying over plywood and with the higher quality Ditra set available now, I don't bother. All portland based cementious products will allow water to pass through. Is it ok to use a polymer modified thinset over ditra. One tilesetter friend of mine says modified thinset works What cars have the most expensive catalytic converters? Can you use modified thin-set over top of Kerdi and Ditra. thinset (or modified); on top of Ditra & under tiles, use unmodified. In general, we don't recommend the use of modified thin-set mortar to set tile over the membranes because these mortars must air dry to cure properly. The type of thin-set mortar (modified vs. unmodified) used to install DITRA depends on the substrate. Both products currently cost about $15. VersaBond, a lightly modified mortar, is made by Custom Building Products. White modified thin-set mortar Meets ANSI A118.4T, ANSI A118.11 and ANSI A118.15T Engineered for use under and over all Ditra and Kerdi products Sag-resistant, smooth and creamy Easy to handle and spread Suitable for use The answer might surprise you. Once you use a modified you have left any of Schuter's printed recommendations so any modified thin-set is a deal breaker. Since DITRA is impervious, it does not deprive the mortar of its moisture. When sandwiched between two impervious layers such as DITRA and porcelain tile, drying takes place very slowly through the open grout joints. The latex also allows a bit more flex in the tile and substrate. Obviously, modified thinset is the better option, and all this debate is useless. joist spacing, single layer OSB or plywood subfloor Areas of Application over any even and structurally sound OSB or Not so fast! You need to use the flat side of your trowel and spread thinset in every direction over the ditra to ensure that all the little waffles are full. Asked By: Miroslaw Gschwendtberger | Last Updated: 28th February, 2020, All portland based cementious products will allow water to pass through. Therefore, extended cure times would be required before grouting if using modified thin-set mortars between DITRA and ceramic tile, including porcelain tile. I am a new home owner and I have been waiting forever to be able to just do whatever I want in my own home. Only make enough thinset that you can use within 20-30 minutes. Check out the video for those details. The Schluter website says it is fine to use MODIFIED thinset to adhere the Ditra to the plywood subfloor, however they specify UNMODIFIED thinset to adhere the tiles to the Ditra. Should I use modified or unmodified thinset? For example, to set DITRA over plywood or OSB, a modified thin-set mortar meeting the requirements of ANSI A118.11 is used. The latex modified is more resistant due to the latex that is mixed in with the adhesive but that doesn;t make it "waterproof". Since DITRA is impervious, it does not deprive the mortar of its moisture. What's the difference between Koolaburra by UGG and UGG?