pot vents plus ridge vent

scrierJune 22, 2007

I have a hip roof with less than 10 ft of ridge so I have pot vents. Would adding a ridge vent help or would it just interfere with the pot vents working properly?

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daddo

The more venting the better, but I wouldn't spend too much on a ridge vent if it isn't really needed. What's a pot vent? Is that like a turbine type?

    Bookmark   June 23, 2007 at 12:52AM
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scrier

By pot vent I mean those cheap metal square things like the following. I have 10 of them on my roof (5 on each of two sections) and the home has about a 2400SF perimeter

http://www.lowes.com/lowes/lkn?action=productDetail&productId=17146-1498-450/RVUH50&lpage=none

    Bookmark   June 23, 2007 at 9:23AM
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marknmt

Sorry I didn't save the source, but when I was doing the roof on our hip I found an on-line formula that was very clear about how many square inches of unpowered vent would serve. I have only 14 feet of ridge, but used a vented shingle, plus I bought several good-sized "turtle" vents and kept the two little ones that the house originally had.

I also went to some trouble to improve the soffit venting. I think it's paid off in the living quality of the house, and it should help ensure that the asphalt roof lies flat for a long time. (We bought pretty good architectural, long-warranty shingles, and figure there's no point in undermining their useful life span with poor installation. I told my wife it was my last roof, and I hope I'm right!)

Good luck,

M

    Bookmark   June 24, 2007 at 4:36PM
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