If you suspect that air is leaking up and out of a party wall made of concrete blocks hire a contractor to seal the blocks.
Gap between roof and wall in attic.
If you meant an eave gap under an entirely new roof between the top of the wall and the underside of the roof that might well be especially if between the rafters or truss rafter tails your eave ventilation gap which for a ventilated unheated unair conditioned attic provides ventilation air to control heat and moisure buildup.
Insulation is technically a solid with a lot of air in it therefore it is not an air gap.
If air can get in odds are moisture can as.
There should be gable vents at the ends of the roof or roof vents for the exhaust air.
There is a low wall which has 2 hatches built into the wall.
Air gaps larger than this work well too they promote ventilation on the foil and help keep the air dry and the air temps lower.
Attic walls are typically found above full gable walls forming a gable or closing the top portion of a side wall beneath a shed roof.
Seal air leaks where bearing or partition walls meet the ceiling in holes made for electrical wiring and where your attic floor meets the outside walls.
When the program detects an open space between a wall and the roof plane above it it automatically creates an attic wall on the floor above that wall to fill in the gap.
Any opening into the attic should be blocked by.
But where the wall sheathing meets the roof sheathing there is a gap of approximately 1 8 of an inch.
I found fixing wire mesh externally to any small gaps at the top of the walls keeps unwelcome types of animal out.
There is often a gap between the party wall i e.
You could instead apply this internally.
Ensure that this gap is well sealed.
Now wait a minute.
Typically we suggest you have an air gap between 1 2 and 3 4 for the radiant barrier to work.
The gap you mention is probably for incoming ventilation air.
Building regulation requirements attic conversion insulation between the roof rafters we have had our attic converted into a bedroom and ensuite.
The royal society for the protection of birds encourage builders to make provision so that critters can enter your roof to nest.
And i was advised that that gap should be protected by a home inspector.
Along the edge of shared walls.