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Total Vents:
400
Where do I install vents graphic
Vent Placement Recommendations
High / Exhaust Vents Needed:
(Within 3' of Ridge Assembly)
200
Low / Intake Vents:
(Within Lower 1/3 of Attic)
200
Comp Roof Drawing
Total Square Feet of Attic Space to be Ventilated
Total Square Feet of Attic Space to be Ventilated:
27,000
Code Required Method:
1/150 (STANDARD)
Calculation:
27,000 ÷ 150 = 180 sq. ft. of Code Required Ventilation
Convert square feet of code-required ventilation to square inches
Square Feet of Code Required Ventilation:
180
Calculation:
180 x 144 = 25,920 sq. in. of Code Required Ventilation
Square Inches Provided:
(400 x 64.80) = 25,920 sq. in.
Composition shingle
Low Profile (Tapered)
NET FREE VENTILATION AREA
1/8" Noncombustible, Corrosion-Resistant Wire Mesh 64.80 sq. in.
Figures based on independent evaluation reports.
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