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Old 10-14-2011, 06:20 PM   #1
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Proper Vents to Soffits


Had someone in today to look at my roof, and he said the proper vents should extend all the way down to the soffit bay, that way they are guaranteed to get the airflow from the soffit. (This is in a cape, in the kneewall area, or crawlspace).

That just seems odd to me...how would warm air get out, if the only channel left to get out, is now all the way down in the soffit bays?

Appreciate any insight.
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Old 10-15-2011, 09:46 AM   #2
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Proper Vents to Soffits


What's the size of the rafters (2 X 4, 2 X 6, 2 X 8, etc...)
How thick is the insulation?
Look into "baffles".
Got any soffit/roof vents?

rossfingal

Last edited by rossfingal; 10-15-2011 at 09:48 AM.
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Old 10-15-2011, 02:01 PM   #3
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Proper Vents to Soffits


Depends on if there are any HVAC ducts there, which way to go- page #3: http://www.habitat.org/env/pdf/ceiling_and_attic.pdf

Air seal the attic, either way: http://www.finehomebuilding.com/PDF/Free/021105092.pdf

Gary
__________________
Clothes taking longer to dry?
Clean the dryer screen in HOT water if using fabric softener sheets.
They leave a residue that impedes air-flow, costing you money.
Clean the ducting in the last six months? 17,000 dryer fires annually!
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Old 10-17-2011, 06:47 PM   #4
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Proper Vents to Soffits


The rafters are 2X6, the insulation looks to be R30, though there is no vapor barrier so hard to tell. It's jammed in pretty thick against the proper vents.
Roof has soffits and gable vents. Front is standard steep cape roof, back is pretty flat dormered cape.
No HVAC ducts up there!
I just thought if heat gets into the attic, it would rise, where it would be trapped since the only opening to get out would be via the proper vents, which would now be all the way down in the soffit bays....
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