Roof Venting By Roof Sq Footage

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.

Roof venting by roof sq footage.

Nine hundred square inches equals 6 25 square feet. Standard ridge vent produces 18 square inches of ventilating area per lineal foot. For balanced ventilation an equal amount of intake vent area net free area should also be installed. Of net free area of intake needed at or near the soffit.

Of net free area of exhaust needed at or near the ridge. So the ridge ventilation has exceeded the minimum requirement. Use avp s roof vent calculator to determine the number and size of exhaust vents you will need. Based on your 1100 sq.

Our roof is 50 feet long so using a standard product we will get 900 square inches of ventilating space. Proper attic ventilation consists of a balance between air intake at your eaves soffits or fascias and air exhaust at or near your roof ridge. 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. Ideally the attic square footage would be measured at the attic floor length x width regardless of roof pitch by the way.

Our passive roof vents are ul certified and rated to withstand wind pressure in excess of 200 mph. And this guideline you ll need a minimum of.