Total Square Feet of Attic Space to be Ventilated
Total Square Feet of Attic Space to be Ventilated:
2937'
Required Method:
1/300
Calculation:
2937 ÷ 300 = 9.79 sq. ft. of Code Required Ventilation
Convert square feet of code-required ventilation to square inches
Square Feet of Code Required Ventilation:
9.79
Calculation:
9.79 x 144 = 1409.76 sq. in of Code Required Ventilation
Square Inches Provided:
(20 x 72) = 1440 sq. in
Square Inches Needed:
9.79 x 144 = 1409.76 sq. in
Where do I install vents graphic
Vent Placement
High / Exhaust Vents Needed:
10
Low / Intake Vents Needed:
10
Total Vents Needed:
20
Composition shingle
Low Profile (Tapered)
NET FREE VENTILATION AREA
Wire Mesh 72 sq. in
Figures based on independent evaluation reports.
Comp Roof Drawing
Questions?