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Old 11-11-2010, 04:26 PM   #1
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Soffit Question


Used to have a cedar shake roof, lower ventilation consisted of 1" holes cut into cedar planks where soffits go (what's the proper term?).

They sheeted the roof, installed asphalt shingles with a ridge vent and alum. soffits. Took a look under the soffits, they cut a strip (roughly 2-4" wide) on the outside edge of the cedar planking prior to putting the soffits up. They also stuck 4" pipe to run from the soffit intake, into the attic (sort of a baffle I guess).

Is that 2-4" strip enough to provide the ventilation if they only had 1" holes cut before?

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Old 11-15-2010, 04:57 PM   #2
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Soffit Question


Take a picture and post it here so we can see the soffit vent holes in the aluminum, please.

Gary

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Old 11-15-2010, 06:49 PM   #3
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Old 11-16-2010, 01:22 AM   #4
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Hard to tell without the brand name.... Maybe someone else is familiar with your brand? They range from 10-19 NFVA per lin.ft. The good thing is the elevated 3/4" which is better than only elevated 1/2". You will get full air to the slot they cut, ask them for the manufacturer's name, look at their website for the NFVA and do the math: http://www.airvent.com/homeowner/pro...it-specs.shtml
eg- http://www.siding-n-windows.com/soff...lum_soffit.htm

Gary
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