I will be tiling the kitchen floor over electric radiant heat, There is a black adhesive under the vinyl tiles that I am taking up. Can I use a floor leveler over the radiant heat mats and pour it directly over the black adhesive and then tile?

What kind of tile vct,wood?

Hi Idaho,

Yes you can. BTW, that black tar glue is known as cutback. LATICRETE® 816 LatiPatch™ mixed with LATICRETE® Admix and Primer. Read how here. http://www.laticrete.com/contractors/products/self_leveling_patching_mortars/productid/5.aspx

Jaz

what kind of tile vct,wood?

I will be using 18" porcelain tiles over 3/4" plywood sub floor.

Are you saying the old vinyl tiles were installed direct over the subfloor? If so, that is wrong. Check if there is a 1/4" underlayment over the subfloor. In any case you will not be installing ceramic tiles over just a single layer plywood subfloor.

Let us know what you find and tell us what specific materials you're planning to use. Start with that for now.

Jaz

The vinyl tiles were glued with black adhesive directly over 3/4" plywood
No other underlayment over sub floor. Vinyl floor is 30 years old. It is next to impossible to remove the black cutback adhesive so I want to use a floor leveler and embed my electric radiant heating mats within it. Then Tile with versabond and my tiles.
sjidaho

No, it's not going to work. You need either a membrane such as Ditra or a concrete backer board.

Jaz