Cost-effective option for improving cathedral roof insulation?
Hello all, Hello Martin.
I’ve read a number of GBA articles and posts regarding how to insulate cathedral ceilings, but I’m hoping for suggestions on the best way to improve our specific existing condition.
I’m in coastal Maine, zone 6a. Windy spot near a coastal river, not much shelter.
The 25 x 25 main wing of my 14 year-old house has a scissor-truss roof, with basic asphalt shingles in relatively good repair.
I have soffit vents and a ridge vent, but no soffit baffles. I have two layers of unfaced fiberglass R19. The insulation is not installed against the sheathing, but was instead installed as a blanket, in contact with the back side of the finished ceiling.
To make matters more challenging, the finished ceiling is T&G, applied directly to the trusses — with no base layer to reduce air infiltration.
We’ve now been through two winters here. As you can imagine, the wind blows through the soffit vents, through the fiberglass, through the T&G, etc. The comfort is pretty poor and our minisplit is working a lot harder than it should. I’m ready to spend some money to make at least an incremental improvement.
Any suggestions for the most cost-effective way to upgrade this package? Removing all the T&G isn’t viable at this point. I can get access to the space by deconstructing two skylight wells. The soffit is 12″ wide and can be easily removed.
I’ll attempt to attach a photo taken from the deconstructed skylight well, showing the blanket, truss system, and underside of the roof sheathing.
Thanks for any ideas.
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