Climate zone 4 cathedral timber frame insulation
I am designing and building a timber frame cottage in Victoria, BC. so climate zone 4, and I’m in the woods, so even damper than average for the area.
I am trying to stay away from foam products, and use mineral wool as much as possible.
The ceiling of the cottage will be 2×6 T&G fir over the rafters, with a “blackout layer” above that (possibly roofing felt unless this causes vapor movement issues).
It will be a standing seam metal roof, using a cold roof system.
I’m thinking that all insulation on the outside of the wateproof membrane is the way to go, but how to achieve that without foam panels seems to be the challenge.
Any advice pointing me down the road is appreciated
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