Baffles in shed roof addition
Prior to buying our house, the owner had an addition added to the back of the home. It is a 1 story shed roof that butts into the original back of the house. I recently had a roof put on the entire home about 1-2 years ago and knew very little about this community/FHB. The contractor added open soffits and a Cora-vent strip near the top of the shed roof to allow for ventilation on the shed roof. This proves for a very leaky house since the cold or hot air can basically come directly into the soffit.
I was thinking on cutting poly-iso baffles and running them all the way up the truss to guide the air from the soffits channeling to the ventilation strip. I was going to attach the baffle to the truss with spray foam to help air seal as well. After the baffles are run, I would install rockwool or some sort of typical insulation in the joists.
Is this a worthwhile project that will keep the roof vented but help tighten up the house? I feel its the best chance I have at venting the shed roof and stopping it from channeling up the stud bays on the 2nd floor where the addition roof butts into the original house or falling down into the conditioned space.
Any help is appreciated!
GBA Detail Library
A collection of one thousand construction details organized by climate and house part