Don t install tile the same day over the ditra heat mat schluter says this is ok.
Ditra mat on concrete slab.
The schluter ditra uncoupling membrane is specifically designed to allow the installation of ceramic and stone tile over any even and load bearing substrate.
Ditra is 1 8 3 mm thick which minimizes tile assembly thickness and reduces transitions to lower surface coverings e g carpet engineered wood and vinyl.
Its primary function is to help neutralize stresses in movement between the substrate in my case the subfloor but it can also work with osb or plywood and the tile.
Megabond from lowes or kerabond are good un modified thin sets.
Ditra is good for new concrete.
Ditra heat tb has additional insulation for going over concrete floors.
Un modified under and over the ditra.
A seasoned floor that never sees moisture you could skip the ditra.
Ditra is essentially a molded plastic sheet with fleece backing.
This will reduce heat loss to the concrete substrate and improve the floor warming response time.
The ditra heat duo offers the same functions as the schluter ditra heat membrane but also features an integrated thermal break in the form of a thicker bonding fleece.