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Old 02-27-2011, 05:05 PM   #1
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roof ridge vent

How long have they been out. How good are they?


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Old 02-27-2011, 05:30 PM   #2
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out where?


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Old 02-28-2011, 10:09 AM   #3
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We've been installing them since the 70's.
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Old 02-28-2011, 12:14 PM   #4
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Ridge Vents

They've been around for some time and when I built (two years ago) I did some research about pros & cons. I installed a roof ridge vent because it made sense to have venting the total length of the house rather than specific areas. The other vents will work, so the primarey consideration is to ensure that you have enough venting for the square footage of your building.
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Old 02-28-2011, 02:47 PM   #5
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Metal Exposed ridge vents were already around when I started roofing in 79, the cap over version didn't come out in my area until the late 80's early 90's and didn't become common place until the late 90's.

Some roof designs with very little ridge "hipped roof" normally require a combination of the two, ridge vents where possible and pot/turtle vents where there is not enough ridge.
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Old 03-02-2011, 03:33 PM   #6
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As stated, various forms of ridge vents have been around for decades.

The most important features that the actual ridge vent product should contain are an external wind deflecting baffle to prevent air entry into an exhaust vent product and an internal filter to prevent powdrery snow or excessive external humidity from gaining entry into the attic, catching it and then alowing the exhaust vent flowage to evaporate and expell it.

Further, for ANY Exhaust Ventilation product to operate as designed for maximum efficiency, there Must be the correct amount of net free square inches of Intake Ventilation as determined by each individual homes attic floor space calculations.

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Old 03-11-2011, 03:55 PM   #7
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I would only use a ridge vent if I had to do so because of the need to ventilate boxed in chanels like you commonly see in some cathedral style roofs. I really can't see any advantage for them in open attic spaces and they cost more than regular vents.


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