Low profile cans /speakers below closed cell in a flash and batt roof.
I have a retrofit (zone 4, Humid SE) where we’re doing an unvented roof with 4″ closed cell SPF and an R-13 unfaced batt.
Contractor and client have been asking to use low profile speakers and can lights below the SPF layer. Generally I have been hesitant to do that as I’m unsure to what extent those penetrations in the G.W.B. will pose issues thermally and hygroscopically But if the foam is very solidly our air/moisture barrier, do I need to worry about those penetrations?
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