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Old 11-07-2017, 12:58 PM   #1
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Provent for soffit


I'm altering a room in my home into a 2nd bathroom. The room sticks out from the side of the house. It used to be a sun porch, so it has 3 exterior walls and a 3 sided hip roof. the roof has a very low pitch, about 15 degrees. I was told by the inspector that I need to put pro-vents between the roof rafters so the insulation doesn't block the soffit openings for venting. No problem. the vent products I've seen typically come in 4 foot lengths. My question is, do I need to use the entire 4 foot length in each pocket, or can I cut them in half and use 2 feet per pocket. 2 feet is more than enough to get from the soffit area to above where the insulation would block it. In fact, some of the rafter pockets near the roof corners are quite short, and would require it to be cut. I'm just curious if an inspector would have an issue with me cutting it in pockets that are long enough to fit the entire 4 foot piece.

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Old 11-07-2017, 01:16 PM   #2
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Re: Provent for soffit

If I could answer what inspectors will accept I would be a very busy man. But, IMO, the baffle only needs to extend up to where it prevents the insulation from contacting the bottom of the roof. In fact, using longer than needed reduces the air flow.

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