Vented metal roof and underlayment
We’re planning on installing a metal standing seam metal roof over an existing vented cathedral ceiling. In zone 5, the existing conditions to remain are gyp. board ceiling and fiberglass batt insulation between the rafters.
After removing the existing cedar roof and skip sheathing the contractor installed plywood and an impermeable (less than .02) high temperature self-adhered membrane over the whole roof.
Will the impermeable membrane create a situation where the plywood can’t dry out?
Please confirm we should still vent the assembly at the soffit and ridge.
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