Venting at Intersection With Uninsulated Cathedral Roof
* How can I prevent soffit-less rafter bays from drawing conditioned air out from the house? (current thought: EPS/XPS blocking between the rafters, sealed in with canned spray foam, and then sealed against the drywall using acoustic sealant. Making that up myself, so it’s likely wrong).
* Is a vapor-impermeable ventilation channel (such as foam baffle or EPS foam + foil) more risk than benefit? That is, as a condensation surface next to sheathing in a leaky house/roof assembly, will that make moisture problems worse?
* Where there is no soffit for a soffit vent, should I install an off-ridge vent down low instead? (from other answers, it sounds like the small cross-ventilation is probably not enough)
* If you were me, would you just close it all back up “like it was”, without ventilation channels or ridge vent, and hope that if it (mostly) worked for the past 40 years it’ll keep on working?
Renovating a 1960’s cabin which was extended a couple of times. Zone 4, PNW
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