How To Figure Roof Ventilation

Advantages of proper roofing ventilation.

How to figure roof ventilation.

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. Up to 6 12 roof pitch use the standard formula as explained in this article. In order to have a balanced ventilation system you need to have the right roof vent calculation. Improperly vented roofs can cook roofing materials.

7 12 to 10 12 roof pitches increase the amount of ventilation by 20 percent. Let owens corning roofing help you calculate exactly how much ventilation you will need for a healthy and balanced attic with our 4 step ventilation calculator. 11 12 roof pitch and higher increase the amount of ventilation by 30 percent. 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.

Although there are many different types of roof vents to choose from ensuring you have the right number of both intake and exhaust vents is a central part of roof design. 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. 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. For projects involving vents with motors the calculation formula is different.

Enter square footage calculate or enter the square footage of the attic or area to be vented. Roof decks can reach over 170 degrees f 76 7 c. Proper attic ventilation offers numerous advantages to the homeowner. Width or area.