On Jun 24, 9:28 am, franz fripplfrappl wrote:
I would like to install ceramic tile over radiant floor tubing.

Can I do this with acceptable results?

1. Install PEX on top of existing subfloor and use furring strips of
appropriate thickness between loops.

2. Install 1/2" concrete backer board on top of furring strips.

Heat transfer plates and thermal mass not an issue at this point. I am
more concerned about structural integrity, i.e., will back board be
strong enough to support tile without flexing or cracks in either tile or
mortar.

No. The backerboard must be fully supported, and preferably adhered
to the subfloor.

R