I am planning to place 3/8 in. thick ceramic tile on my 80 sq ft kitchen
floor over an electric heating element.. I would like some feedback on the
proper underlayment support for this project while keeping the additional
floor height to a minimum. The joists are 2x8s placed 16 in on center. Next
comes sheets of 5/8 in. plywood with an additional 1/4 in. of plywood on
top. The tile store recommended taking up the 1/4 in. plywood and laying
down 1/2 in. cement board. Then install the Flexterm heating elements to the
cement board and spread the thin set adhesive to accept the tile. Is anyone
familiar with this process?
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