How To Figure Roof Ventilation

Roof decks can reach over 170 degrees f 76 7 c.

How to figure roof ventilation.

11 12 roof pitch and higher increase the amount of ventilation by 30 percent. 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. Advantages of proper roofing ventilation. 7 12 to 10 12 roof pitches increase the amount of ventilation by 20 percent.

Improperly vented roofs can cook roofing materials. 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. Proper attic ventilation offers numerous advantages to the homeowner. In order to have a balanced ventilation system you need to have the right roof vent calculation.

Roof ventilation calculator enter your attic area or length and width to determine your ventilation needs. 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. Width or area. Up to 6 12 roof pitch use the standard formula as explained in this article.

Enter square footage calculate or enter the square footage of the attic or area to be vented. For projects involving vents with motors the calculation formula is different. 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.