Can I use other manufacturers’ modified thin-set mortars to install tile over Schluter boards and membranes?

No. Our position on the use of other manufacturers’ thin-set mortars within our systems in general has not changed. We have no control over the formulation of other manufacturers’ products and therefore cannot guarantee consistent, positive results with their modified thin-set mortars when installing tile to Schluter® boards and membranes. We continue to warranty other manufacturers’ modified thin-set mortars to bond DITRA to approved substrates.