Tips For Assessing Your Needs

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).

The U.S. 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.

Always have a balanced ventilation system. In no case should the amount of exhaust ventilation exceed the amount of intake ventilation.

 

How to Calculate

Use GAF’s Ventilation Calculator at GAF.com/en-us/for-professionals/tools/ventilation-calculator