Follow-up question about the roof
I just posted a question about the wall cavity. I should have asked about the roof which consists of 2×12’s 24″ O.C. with 11-1/4″ blown-in cellulose R-40+ then 1/2″ CDX and over that 5-1/2″ SIPS R-32.
Over the SIPS I’m going to 1″ strapping vertically and than 1/2″ CDX to create a cold roof. I’ll have over a R-70.
My concern is with insulation in the framing cavity I might be letting the dew point move closer to the heated side of the house.
I live in Southwestern NH.
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