How Many Soffit Vents Does A Roof Need

Based on your 1100 sq.

How many soffit vents does a roof need.

8 perform similar calculations for the roof and ridge vents. Divide the soffit vent space needed by the square footage of each vent to calculate how many soffit vents you need. Near ridge of the roof. Today s homeowner serves cookies to analyze traffic and better serve you.

Haskell street appleton wi 54914. Copy to clipboard embed product catalog view the asc product catalog soffit calculator calculates exactly how much material you will need where to buy where you can find our products email protected 1905 w. Measure your attic the building requirements will probably tell you to place a certain number of soffit vents per square foot of ceiling space. 800 558 3414 2020 appleton supply co inc.

For example you might have to place one soffit vent and one other kind of vent for each 150 sq. 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. Read on to find out how to calculate the amount of vent area needed for your attic. Thus if your attic is 450 square feet you need roof vents equaling 3 square feet.

So if your attic is 450 square feet you will need 3 square feet of vent space evened out throughout the entire space and divided equally between inlet and outlet vents. Choosing round soffit vents for this home means that 8 square feet of required ventilation be divided by 0 196 for about 40 round vents. The net free area nfa rating indicates the amount of space each roof vent covers. As a general rule your roof needs 1 square foot of vent area for every 150 square feet of attic space.

An attic s intake vents are most commonly installed directly in the soffit either as individual vents spaced every few feet or as one continuous perforated soffit running the entire length of the. You will need to have 1 square foot of vent area for every 150 square feet of attic space. Using the previous example if you need 10 square feet of soffit vent space and each vent is 0 89 square feet you need 12 soffit vents.