Roof Venting By Roof Sq Footage

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.

Roof venting by roof sq footage.

Of net free area of exhaust needed at or near the ridge. 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. For the 1 150 attic ventilation requirement simply double the amount of exhaust and intake calculated.

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. 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. Of net free area of intake needed at or near the soffit. Ridge static attic vents 384 00 minimum sq.

And this guideline you ll need a minimum of. 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. Standard ridge vent produces 18 square inches of ventilating area per lineal foot. Based on your 1100 sq.

So the ridge ventilation has exceeded the minimum requirement. Our roof is 50 feet long so using a standard product we will get 900 square inches of ventilating space.