Large format tile (LFT) is 15" (38 cm) or greater on any side as well as heavier natural … It is also good for shower floor tiling. Large-format natural stone tile is in demand for a variety of reasons. Some modified thin sets will dry properly between Ditra and porcelain tile, but not all will. Polymer modified mortar Many of these lasted for several years although I have to add the asterisk that they were built with smaller ceramic tiles- not large format porcelain. Non slump formula allows for easier medium bed installation (up to 3/4-in thick) of large floor tiles. For use on floors only. Will your tiles fall off of the walls? Large format tile is considered to be square or rectangular tiles larger than 12x12, including popular wood look porcelain planks in sizes like 6x24 and 6x36. Unmodified thin-set mortar is recommended to set ceramic and stone tile, including large format tiles, over the KERDI membrane. A lot of showers built in the 80’s and 90’s were built right over gypsum wall board with mastic. The History of Thinset. This is used with large, heavy or thick tiles. AVAILABLE AT SELECT RETAIL LOCATIONS ONLY Large Format Tile Mortars Select one of CUSTOM’s dry-set modified mortars for large and heavy tile (also called medium bed mortar) to support large format tile installations. Portland cement-based unmodified thin-set mortars are dependent on the presence of moisture for hydration in order to gain strength. Europe has been designing with these extra-large format surfaces for a few years. Since KERDI is impervious, it does not deprive the mortar of its moisture. Back in the days of the early 1900s, tile installers used a procedure known as the “full bed method.” Good adhesion for ceramic, porcelain and natural stone tiles with one or more sides greater than 15-in. To better understand this modified vs. unmodified thinset talk, you might want to know the “behind the scenes” of this mortar blend and how modified thinset came to life. Thinset Decoded: Which is the best thinset to use for Ditra, Kerdi, porcelain tile, floors, large tile, wood look tile, and showers. ALL-SET, in turn, is the modified thin-set. Designers like the aesthetically pleasing, open look it gives floors and walls in residential and commercial applications. Large format porcelain slabs increase the scale and style of porcelain tile on par with natural stone slab. To make things easier for you: SET is the unmodified thin-set and it should be used when dealing with shower or bathroom walls. There’s also a medium bed thin set mortar which is a variation that’s used for slightly larger applications. Then there’s yet another variation of thin set … Here is the problem, Ditra is a waterproof membrane. But large-format tile also has its installation challenges. Not likely. This is opening up a whole new world. Consumers like the natural beauty of a large stone expanse and appreciate the easier maintenance resulting from fewer grouted joints. Polymer-Enriched Thin-Set Mortar Porcelain Tile Mortar is a regular-setting, polymer-enriched (“modified”) mortar for installing a wide range of tile and stone over a diverse range of substrates in thin-set applications. It is best suited for large ceramic, porcelain or stone tiles, to name a few. Thinset also provides structural support so that very minor adjustments in height can be made. Now they have hit the American market and are making a huge impact. Unmodified vs modified. Schluter has tested their modified thin set to make sure it works properly and will dry within a reasonable amount of time. 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