Degradation of closed-cell spray foam when applied in cold climates
I have a 3rd floor cantilevered overhang that has a conditioned space above. Underneath that cantilever I plan to do 9″ of closed cell spray foam to maximize the insulation so I don’t run into comfort issues with the floor space above it.
The floor assembly is:
3/4″ plywood subfloor
9.5″ cantilevered joists and beams with 9″ spray foam in between.
I ended up buying the home Depot caniaters of closed cell spray foam so I could do it on my own time rather than waiting for the spray foam crew to show up.
The instructions on it say the min ambient temperature to apply is +16C (about 61F). It doesn’t look like that weather is coming anytime soon, woth next week looking steady at +4C (39 F) so may be forced to do it no near the min application temp.
Does any building science nerds on here have any info on degradation of R value of foam based on such parameters?