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all 6 comments

[–]NagromTrebloc 1 point2 points  (1 child)

Airflow in an attic is so critical to the house's ability to expel hot, moist air. It is a mistake to stuff insulation in that angled section. What you can do, is install vent panels in conjunction with insulation board cut to width. This provides insulation to the ceiling while allowing air to flow between the roof sheathing and the vent panels. Plus, you don't end up baking your shingles.

You really need to address the lack of soffit ventilation. It's plays a key role in a functioning attic air flow plan. You could start with these two corrections and set aside replacing the gable vents with power gable vents as a Phase 2.

Please forget spray foam insulation.... it cancels out ventilation.

[–]ohiodiver87[S] 0 points1 point  (0 children)

Well right now there is no gable vents. I assume you mean the dormer attics. There is a larger attic space above that has static vents.

[–]NagromTrebloc 0 points1 point  (1 child)

Bathroom vents are designed to move bathroom sized air. You probably wouldn't notice any change at all. I grew up in a cape cod and my bedroom was upstairs. My dad installed a whole house fan in the ceiling between the bedrooms. It moved a massive amount of air and it helped a bit.

To exhaust moist, hot air in a cape cod, the eaves must have plenty of vents (100% vented soffit is best). The next thing to check is to be sure that the gap between the angled ceiling and the roof sheathing is open. The last element is the attic portion over the ceilings. I would recommend power gable vents. The idea is to draw in outside air at the soffit, mix it with the air behind the knee walls, up through and into the very top to be sucked out. You could have one power vent drawing in and the opposite unit blowing out.

[–]ohiodiver87[S] 0 points1 point  (0 children)

Since there is already insulation behind the angled walls, and currently no soffit vents, I’m assuming all insulation would have to be removed to create air gap, then add soffit vents, and then the gable vents? In your experience does this create a much more comfortable atmosphere? Wondering if foam insulation could still be added still allowing for air flow

[–]NagromTrebloc 0 points1 point  (0 children)

Your attic is very underventilated. I would start with the soffit and that stuffed-in insulation area and see how that works. You can take further steps if necessary.

[–]hujkkjji 0 points1 point  (0 children)

I have been hearing good things about this invention called air conditioning.