How Roof Life Is Being Reduced Due To IMproper Attic Ventalation
Use this calculator to help determine the proper amount of attic ventilation based on U.S. FHA 1/300 guidelines.
- 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.