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Old 06-23-2012, 04:22 AM   #1
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Attic vent too near ridgeline?


All attic vent instructions say to postion the vent as high as possible but with the highest part of the vent structure below the roof apex. Why is that? I may need to fudge that and I want to know what to look out for.


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Old 06-23-2012, 07:34 AM   #2
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Attic vent too near ridgeline?


Why are you not using a ridge vent instead? A ridge vent will vent the whole roof not just a big circle.

You need to mount any roof mounted vent far enough below the roof cap in order to be able to properly seal around the entire vent, not just the sides and bottom.

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Old 06-23-2012, 12:02 PM   #3
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Attic vent too near ridgeline?


I should have been more clear. I'm installing a solar attic fan. I just set it up there now and the flashing doesn't come any where near the apex. (shallow pitched roof 3:12)
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Old 06-23-2012, 12:55 PM   #4
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Attic vent too near ridgeline?


Not a big fan of those.
There just never going to be able to pull enough air out and a lot of the hot moist air will still be stuck between the rafter bays.
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Old 06-25-2012, 05:26 PM   #5
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Attic vent too near ridgeline?


Power vents in attics are not always a good idea. Most of the time they are not a good idea, but it depends on your climate and the construction of your house.

See this for some information:

http://www.energyvanguard.com/blog-b...Are-a-Bad-Idea
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