Black metal roof — bad idea?
My better half loves the look of black standing seam metal roofing.
I am concerned with the heat gain, both into the living space and its effect on any sealants (roof penetrations, edge trim pieces). I’m not sure if spray foam is effected by these kinds of temperatures, but its going to be hot up there in the baking August sun. Obviously it doesn’t get much hotter than black. I suppose in the winter we will welcome the heat.
We are in zone 5b (central Oregon — very sunny and temps in the 90’s for weeks).
The roof will have synthetic underlayment, as well as snow and ice barrier. Then 3/4″ plywood, under which will be 3.5″ of closed cell spray foam, and then the remainder of the 11 7/8″ I-beam will be filled with blown-in-blanket fiberglass insulation. (R-49 total, with very good air sealing). The roof will be unvented.
Should I push for a more ‘modest’ color? (charcoal, bronze were both options).
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