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Old 08-21-2019, 05:49 PM   #1
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Venting for Patio Cover Roof


I have built a patio cover. Rafters are 2x10 16" o.c. spanning about 15 feet. I put blocking between each rafter, 3 blocks between each pair of rafters. Top is asphalt shingles. I'm planning to have a soffit and finish the under side of the rafters with tongue and groove. Do I need to include soffit vents and a vent at the top of each rafter against the house? If I do need venting do I need to put holes in the blocking to allow air flow? I was told because its outside venting isn't needed but I wanted to confirm.

Thanks,
Richard
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Old 08-21-2019, 06:07 PM   #2
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Re: Venting for Patio Cover Roof


You only needed one set of blocks in the middle 7 ft from wall and beam and they could have been 2x4s flush with the bottom.

Unvented it will hold the heat from the sun and transmit that down by late afternoon.

Any moisture that does get in there will not dry. I would want high and low venting.
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Old 08-21-2019, 07:02 PM   #3
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Re: Venting for Patio Cover Roof


Its in now so I'll just drill some larger holes in them to allow for air flow. I'm not too concerned about the heat as the cover is pretty high up and we don't get extreme heat.

Since the one end is connected to the house the roof is shed style, not gable. I'm seeing my options as basically putting soffit vents on the under side a the top and bottom of the roof. Would I be best off using a continuous vent, or should I drill through the rafters and put in individual soffit vents every few rafter bays?

Alternatively I could create a continuous soffit vent by drilling the top and bottom tongue and groove piece but I'm not sure if bugs and such would crawl up in there.
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Old 08-21-2019, 07:11 PM   #4
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Re: Venting for Patio Cover Roof


You can by some that are just strips that you can work in with the wood.

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Old 08-21-2019, 08:02 PM   #5
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Re: Venting for Patio Cover Roof


Thanks.
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