I have a concrete basement floor with some small cracks and some Latex paint "splatters".
I plan to use the concrete floor as my passive cooling source for the wine cellar I am building.
I plan to install DITRA over the concrete to prevent water penetration and cracking of the Travertine finish tiles.
Do I need to do any special preparation to the existing concrete floor to get the unfortified thinset to adhere to both the DITRA and concrete? I have already sc****d and power washed the floor(I am concerned about the paint splatters)