Can I use spray foam on a ceiling that also serves as the roof under a deck?
I am replacing an exterior deck over a sunroom.due to leaks in some old EPDM material under a deck.
The sunroom ceiling joists support the flat roof above it, and the deck is suspended above the flat, EPDM covered roof. Can I spray the sunroom ceiling jousts with foam before installing the sunroom headboard ceiling? Would this produce condensation into the sunroom ceiling? The deck above is outside and exposed to summer heat and winter snow.
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