Les Posted May 9, 2019 Report Share Posted May 9, 2019 had several hundred foot of ceramic tile installed on an uninsulated concrete slab here in Michigan. five zones of floor heating electric film under tile. none of them work. i had contractor remove several tiles that were over mat/film and he had installed them with a latex mod mortar, notched 3/8" directly on top of mat. there is no electrical issues (all new and triple checked for continuity). best gain I can get after 10days of operation is plus five degrees .l any ideas? Quote Link to comment Share on other sites More sharing options...
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