Decks, Patios, Porches and Docks - Air Vents for Patio Cover

My husband and I and in the process of building a patio cover. It's attached to the house so the only hardiplank that was removed was for the ledger board.

Here's where we disagree - I think we need air vents and my husband says we do not. He says since it's attached to the house and not part of the house it doesn't need any vents. And even if we did he says it won't move any air anyway. But how can you be sure there are no any small areas where the air from the cover can enter the house.

We live in Texas so it gets very hot here.

Thanks!

what kind of air vents are you talking about? roof ventilation? heating and air conditioning?

Not a/c or heat just the slotted vents on the sides of the cover to move air

Hi there...

By what I am reading I wonder if the patio cover is flat or gable end...

If flat, how high?

You mentioned that you removed hardi-plank so I am assuming that you have built this below your soffit...?

I would be interested in seeing a photo that I could assist in your decision to add or not add vents.

Yours, BJ

A picture or sketch would help, but since you said you removed the Hardi siding to attach the ledger, you must be putting up a flat cover (sloped away from the wall), and I'm assuming a solid roof on it.

You seem to be talking about installing vents in each of the side facias. If that's the case, I agree with your husband. They wouldn't do a thing to move any air.

It's a slanted roof patio cover. The back of our house is 2 stories high and we are attaching it between the 1st and 2nd floor. The ceiling will be flat at 8ft high. We will have shingles.

OK, that helps, and it changes everything.

A solid ceiling, solid roof sheathing, and the entire perimeter between the 2 will be enclosed.

I would add a "mushroom" vent or two (depending on the width of the structure) on the roof, near the wall, and a louvered vent or two (same number as on the roof) in the ceiling, at the outside end, just inside or just outside the beam.

Thanks for the help. Can you tell me what these vents do - what they prevent and what will happen if my husband doesn't listen and completes the project without vents?

Thanks!

These vents will reduce the temp. of the air between the ceiling and the roof sheathing. Comp. roofing is a great solar collector, and that space between the ceiling and the roof sheathing will be over 150 degrees at 4PM in July and August without them. (Probably only be 130 degrees with them.)

They will extend the life of the roofing and the ceiling.

I'd use a pair for every 10' of width of the cover. At 10' wide, 2 "mushrooms" and 2 louvered. At 20', 3 "mushrooms" and 3 louvered. At 30', 4 "mushrooms" and 4 louvered.

Thank you so much for your advice. I'll share all this info with my husband.