I used to be skeptical of Bill Hulstrunk's assert that AccuVent baffles could stand up to being dense-packed within an enclosed cavity.You might be describing a cathedral ceiling that incorporates all attainable mistakes. There was no attention to air sealing. The worst attainable insulation was applied (fiberglass). Along with the roof assembly is

I might increase to Martin's listing of supplies for rafter vent channnels, fiberboard sheathing. I exploit I joists for vented cathedral ceilings and staple 1/2" fiberboard to the bottom of the best wire with the I joists. It may be ripped with a table saw and installs swiftly, fiberboard does Use a large perm rating and could allow smaller amount

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