Radiant sub-floor – how to make an air space with foam?
Hi – Speaking with the manufacturer of Thermal Fin C plates and it was mentioned best to leave a inch or two air space below plate attached to sub-floor. I have floor trusses that are spaced 12, 14, 16 inches wide so I was going to simply spray foam for an R-30 to unconditioned full basement below. Talking 70 bays to figure this out for. How would you create an air space if you were in this stituation or would you simply foam locking it all in? Thanks
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