attic vent questions

1423 Views 3 Replies 4 Participants Last post by Chemist1961, Jun 13, 2009

Grimace

Discussion Starter · Jun 12, 2009

I have an approx 1500sf hip roof on a single story ranch and I'm about to install an electric attic vent in place of the middle of 3 current passive vents which are only about 50si each and have a few questions.

First, what is the best way to block off the other 2 passive vents so the fan does not suck air from them? I'm not reroofing soon so external appearance will probably remain the same. I do have a partial bundle of shingles though if its not too hard to patch. (I'm adding plenty off soffit vents so I'll have adequate intake)

Second, what kind of roofing nail should I use? There seems to be so many types and I'm not sure which to get?

Thanks!

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Gary in WA

· #3 · Jun 13, 2009

Use 1-1/4" hot dipped galvanized roofing nails. The nail point is required to come through the sheathing if 1/2" or 5/8". Use 3/4" sheathing, the nail is required to go 3/4" into it, no shorter. That is why you should see nails when 1/2" ply or 7/16"osb is used, if not , improper nail application.
Read the shingle wrapper. Be safe, G

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