I'm looking to install porcelain tile over Ditra heat mat in our kitchen. From what I read you need to use a modified thinset for under the ditra mat(over plywood subfloor), and unmodified for over the ditra and under the porcelain tiles. I went to the local Lowe's and wasn't sure what to buy.

I'm not entirely sure what is what. I ended up buying Kerabond T - Medium-Bed and Thinset Tile Mortar and a jug of Keralastic.

Would this work if I added the Keralastic for under the ditra and don't add it for on top of ditra?

enter image description here



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. schluter is making there own mortar now btw, it allows you to use modified thru out.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.