What alternatives are there to Gyp-Crete on a wood truss and sub-floor? Carpet, tile and hardwood floor will go on it.

We design and spec our RHT floor panel system, Surface mount 3/4 thick, 1/2 pex.
Runs about $3.00 sq foot pipe, manifold, heat transfer plates, turns and site purchased 3/4 ply ripped to 6 inch for infill.
Glad to help should you need it.
Dan

Looks like an interesting product. How about another type of poured floor?

Posted By ICFconstruction on 16 Mar 2011 02:49 PM
Looks like an interesting product. How about another type of poured floor?

We just used small agg. regular concrete but we had designed the floor load for this. It will crack more than gyp. If I may ask what are your reasons for not using gyp?

What I don't like about Gyp-Crete is the lack of tolerance to water. Why did you use concrete?

This is purely speculative but I'd look into using fairly thin plain concrete with PVA fibers or thin concrete covered by hardibacker (or similar) to make the surface crack free.
http://www.concretedecor.net/Abstracts/CD907-Technology.cfm

Alternate to gyp crete is what is called light weight concrete, though it weighs about 17 lbs per sq foot 1 1/2.
I have used this many times.
Mix is 7 1/2 sack portland cement, pea gravel, sand and fibermesh. pours wet, and will crack.
we get that product placed (labor & material) for about $1.50 square foot.
Place plastic on your platform before you place tubing to minimize cracking.
works well and a 2 inch line pump can handle the concrete.
Dan

Posted By ICFconstruction on 17 Mar 2011 07:15 AM
What I don't like about Gyp-Crete is the lack of tolerance to water. Why did you use concrete?

I would agree with the water issue however not all gyp. products have that problem. It does depend on the mix and $$$. I used concrete because I overlay it with a stamped floor which has to much tensile strength for gyp. It will pull up a small layer of the gyp. Bob