Venting a dense-packed cathedral ceiling
I would like to dense-pack a cathedral ceiling with rock wool insulation. Rafters are 2×10. Do I need to install ProperVents along with soffit & ridge vents, or can I just close in the area and pack it in?
I do not have any ceiling penetrations to leak air in and rock wool is hydrophobic. Does this have any effect on vapor finding its way in (or is condensation occurring on the backside of the roof sheathing a totally different issue)?
The roof decking has been fitted with a Ice & Water Shield (rubber membrane) from the eaves to the ridge, and then finished with architectural fiberglass shingles.
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