Total Square Feet of Attic Space to be Ventilated
Total Square Feet of Attic Space to be Ventilated:
180.5'
Required Method:
1/150
Calculation:
180.5 ÷ 150 = 1.20 sq. ft. of Code Required Ventilation
Convert square feet of code-required ventilation to square inches
Square Feet of Code Required Ventilation:
1.20
Calculation:
1.20 x 144 = 172.80 sq. in of Code Required Ventilation
Square Inches Provided:
(4 x 72) = 288 sq. in
Square Inches Needed:
1.20 x 144 = 172.80 sq. in
Where do I install vents graphic
Vent Placement
High / Exhaust Vents Needed:
2
Low / Intake Vents Needed:
2
Total Vents Needed:
4
Composition shingle
Low Profile (Tapered)
NET FREE VENTILATION AREA
Wire Mesh 72 sq. in
Figures based on independent evaluation reports.
Comp Roof Drawing
Questions?