What type of mortar do I use for Ditra?

For example, to set DITRA over plywood or OSB, a modified thin-set mortar meeting the requirements of ANSI A118. 11 is used. To set DITRA over concrete or gypsum, Schluter-Systems recommends an unmodified thin-set mortar meeting the requirements of ANSI A118.Click to see full answer. Regarding this, what mortar do you use for Schluter?Unmodified thin-set mortar is recommended to set ceramic and stone tile, including large format tiles, over the KERDI membrane. Portland cement-based unmodified thin-set mortars are dependent on the presence of moisture for hydration in order to gain strength.Also Know, what is unmodified mortar? In general, unmodified thin-set mortar is a blend of Portland cement, sand, and water retention agents that is mixed with water by the user. The appropriate product standard for unmodified thin-set mortars is ANSI A118. Look for this standard on the packaging (e.g., product meets ANSI A118. One may also ask, can you use modified mortar on Ditra? Since DITRA is impervious, it does not deprive the mortar of its moisture. 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.Can you use Ditra over cement board?Primarily because cement board is heavy, adds height to your tile installation, and needs to be waterproofed. DITRA has been out for a long time and most professionals use it because it will prevent tile from cracking, it will be easier to install, and it will lessen the height between your tile adjacent flooring.

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