Happy Holidays everyone. I am installing radiant heat in the garage and trying to calculate the PSI of the foam required to be installed under the slab. The xps is rated at 25, 40, 60 & 100psi. Recommendations have run from 25 psi to 60 psi. Price as you can guess increases at approx 50% more for the 60 psi over the 25. Availability is also a factor.
Has anyone installed foam under their slab and if so, what was the psi rating and was it sufficient.
Concrete will be 4500 psi with wire mesh, probably fiberglass fibers as well, poured to 6 inches.
Any and all assistance is greatly appreciated. Thanks. Gregg
Has anyone installed foam under their slab and if so, what was the psi rating and was it sufficient.
Concrete will be 4500 psi with wire mesh, probably fiberglass fibers as well, poured to 6 inches.
Any and all assistance is greatly appreciated. Thanks. Gregg