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Old 10-07-2011, 09:16 AM   #1
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Venting of Roof/Attic


I am new and have read posts on venting of attic, but wanted to get some feedback on my roof. I was told yesterday by a roofer that I do not have enough ridge to properly vent the attic above the main house (left of garage) & would need to use an attic fan. However, the area over the garage can use a ridge vent. The attic over the garage and main house are connected, but the roofer said they would be vented differently. It would seem that there may be a conflict. I have attached pictures so you can see house & offer your advice on how to properly vent attic. Thanks, Patrick
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Old 10-07-2011, 07:53 PM   #2
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Venting of Roof/Attic


looks like you allready have a fan powered by electric????

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Old 10-08-2011, 04:59 AM   #3
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Venting of Roof/Attic


It is not working. We are looking at repairing or replacing our roof, so that is why this has come up. It also has a ridge vent in the same area where the attic fan is located. Please let me know how to properly vent this attic. Tks
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Old 10-08-2011, 07:08 AM   #4
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Venting of Roof/Attic


The peak over your house is higher that that over the garage so the garage venting will not contribute to the house side. I would just replace the power vent. Better to be over vented than under.
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Old 10-08-2011, 07:18 AM   #5
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Should the area over the garage have a ridge vent? of another attic fan over garage area? Tks for your help.
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Old 10-08-2011, 04:49 PM   #6
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Venting of Roof/Attic


Both attics should be vented if they are over conditioned space (which they are).

If you are re-roofing, I would opt for passive ventilation as a default. Where is the make up air coming from (i.e. soffits or gable vents)?

Soffit and Ridge venting is the preferred method of venting.

See the attachment for proper ventilation technique.
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Old 10-12-2011, 06:06 PM   #7
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Venting of Roof/Attic


Thanks for the info...very helpful. I have 20' of ridge over house. Roofer said that is enough to vent attic with ridge vent. We have soffits. Any additional feedback / advice would be appreciated.
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Old 10-13-2011, 11:12 AM   #8
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Originally Posted by ecoastpro View Post
Thanks for the info...very helpful. I have 20' of ridge over house. Roofer said that is enough to vent attic with ridge vent. We have soffits. Any additional feedback / advice would be appreciated.
Depending on the width of the ridge opening, that may be enough.

If you are going back with asphalt, keep in mind that ventilation will be a bit more important to allow for some convective air movement in the attic.

What are you putting back? I would hate to see asphalt back on in lieu of what was previously attractive shake.

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