![]() So if you can have a soffit vent and a ridge vent, that’s the best situation. By having the gable vent, you get some sort of turbulence up there that interrupts that flow. ![]() Now, your question is: what about the gable vent? And the answer is you should block it off, because it does interrupt that flow of air from the soffit, under the sheathing and out the ridge. And then, so, the positive pressure at the soffit goes under the sheathing, goes out at the ridge. The ridge is always in a depressurized area of the house, because the wind hits that and sort of bounces off the roof and goes in a circular motion, which causes a draw at the ridge. The best way to do that is with a combination of ridge and soffit vents, because they work together.Īnd how they work together is that the wind blows and it presses up into the soffit vent, rides up under the roof sheathing and then exits at the ridge. But remember, the purpose of that ventilation is to dry out the insulation that’s in the attic space. TOM: The best ventilation system that you could have – and I wouldn’t count much on the ventilation through the balloon framing, because that’s presuming that the home is going to be pretty drafty.
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