Thanks DEnd,
I'm very familiar with radiant heated homes with good and not-so-good enclosures.
This new house will be my 4th radiant system design & install. Cold to very cold climates.
I just sold my 1st install that I lived in for 15 years. When it was 0*F outside, the floors were 76*F = about 12 BTU/H/FT^2 with room temperature of 70*F, had to wear house slippers.
Your diagram is a 2 surface solution.
How durable is your 3/8" cement board across the top of the foam gap?
I like the granite, but I'm unsure.
I would like to find a 1 piece solution.
Last edited by buffalobillpatrick; 03-20-17 at 11:25 AM..
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