A question on the right way to ventilate
I am the president of a condo association and I would like to have a ridge vent installed in the attics, here are the specifics:
The building is 50 years old, it is stick framed with 2 main floors, basements/crawlspaces underneath and attics above. The attics are typical, like a normal house except the gable ends are cinderblock firewalls instead of exterior walls. The attics have ventilation in the soffits and a couple of passive vents in the roof. The passive vents only have a 6" X 6" hole cut in the plywood, it is very small and I can't imagine that much air flows thru them. They are only halfway up the roof so the hot air probably puddles up above them.
The attics get extremely hot, they feel hotter than most of the other attics I have been in (I'm an electrician, I spend a lot of time in people's attics). We had a new roof put on about 4 years ago, but I wasn't on the board of directors yet so I didn't get a chance to recommend a ridge vent be installed at that time. During certain times of the day I can see the roofing shingles sort of lift up a bit and become wavy. I also don't like having so much heat build up in the attic because I believe it is making the second floor units hotter in the Summer, even with the insulation in the floor.
I would like to have a ridge vent installed across the entire roof now. I was wondering if I should have the existing passive vents sealed off, I don't want them to negatively effect the flow from the soffit vents to the new ridge vent.
What do you think? Is there anything else I should be worried about?
Your right ridge vents would work best.
Are you 100% sure those other vents are not connected to bathroom fans or something else? Just look and see if anything connected to them.
Get rid of them if there just air vents, there in the wrong area if there real air vents.
You also need vented soffits of the ridge will not be very effective.
If there is what looks like vent soffits make 100% sure not just for looks and really are open to the attic.
Also make sure there not covered up with insulation.
Speaking of which has the attic ever been air sealed, and how much is up there?
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