Using Spray Foam on the Eaves of a Low-Sloped Hip Roof
Have an existing house in zone 7a, built 1960 with a hip roof (sloped on 4 sides) that looks like 4/12 slope. Existing ceiling construction is gypsum/plaster, then wax kraft paper, then 4″ wood shavings then 6″ blown insul.
We have had frost/condensation issues in the roof that this past spring has caused dripping within the home.
One solution and likely the best to solve air leakage issue is to remove all the insulation and spray 2″ of closed cell foam and then fill with blown to R50.
We have had one contractor say that due to the low slope and hip roof that the only way to properly spray the top plates of the exterior walls is to remove a 4ft strip of the roof sheathing & shingles so the plates can be properly sprayed.
Im hoping i could get peoples thoughts on this regarding removing the strip of roof sheathing? is that really necessary?
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