Air sealing at base of dormer (behind roof apron)

TheodoreTheodoreNovember 28, 2012

I've a cape cod house (in New York) with a shed dormer on the upper floor, very similar to the attached diagram. I know that the roof's steeper pitched areas need to be vented from the soffit on the 1st floor to the ridge vent.

But... my question is what should I do for insulation in the remaining roof below the dormer, identified as the "apron" on this diagram (highlighted with red arrows)? I've exposed from the inside and can see there is only fiberglass bat insulation pushed up against the roof deck and even into the soffit. There are no soffit vents in this section, yet it certainly does leak air (soffit and facia are 1"x6" nailed together and you can see daylight between the cracks). Should I air seal the soffit and fascia in this area, isolate it from the vented portion of the roof, and hope for the best? It's on the north side of the house, so I'm not really worried about heat gain.

All comments greatly appreciated!!

Thank you for reporting this comment. Undo

For a small area like that, spray foam with no ventilation..

    Bookmark   December 6, 2012 at 2:26PM
Sign Up to comment
More Discussions
Plaster stamped like tile?
My house was built in 1915. I am tearing out some 60s...
New windows in kitchen for 1926 house
We are planning a kitchen and bathroom remodel in our...
Need color help with exterior paint on 1902 Victorian with bad siding
We have a 1902 victorian in a small town in Iowa. Unfortunately,...
Jennifer Weinman
Should we try to reuse old windows?
I am not sure how old the windows in our second floor...
prairiemoon2 z6 MA
How to fix 1" gaps in drywall seams?
We recently bought our home (build in 1938). One of...
Sponsored Products
Clavius Small Wall Sconce
Adeco Black Barstool Upholstery Chairs (Set of 2)
Best Quality Lighting Path & Landscape Lights LV75L-AB Landscape Lighting Spot
$97.20 | Home Depot
Liberty Furniture Keaton 7 Piece Trestle Table Set in Charcoal Finish
Beyond Stores
Philips 14W Dimmable BR40 Reflector LED Bulb - E26 Medium Base, 120V
LBC Lighting
Burnished Bronze One-Light Foyer Pendant
$139.90 | Bellacor
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™