Roof Venting By Roof Sq Footage

So the ridge ventilation has exceeded the minimum requirement.

Roof venting by roof sq footage.

Of net free area of exhaust needed at or near the ridge. If this is not possible and the homeowner does not have any documentation on file listing attic square footage you could use the footprint of the house aerial view of the house or the number of shingle squares one. Our roof is 50 feet long so using a standard product we will get 900 square inches of ventilating space. Build your roof empowers you to select each layer and component that goes into your total protection roofing system so that you get the roof you want to protect your home.

For the 1 150 attic ventilation requirement simply double the amount of exhaust and intake calculated. Of net free area of intake needed at or near the soffit. Federal housing authority recommends a minimum of at least 1 square foot of attic ventilation evenly split between intake and exhaust for every 300 square feet of attic floor space. And this guideline you ll need a minimum of.

Nine hundred square inches equals 6 25 square feet. Our passive roof vents are ul certified and rated to withstand wind pressure in excess of 200 mph. For balanced ventilation an equal amount of intake vent area net free area should also be installed. Use avp s roof vent calculator to determine the number and size of exhaust vents you will need.

Ideally the attic square footage would be measured at the attic floor length x width regardless of roof pitch by the way. Ridge static attic vents 384 00 minimum sq.