20812 - O'Hagin

Total Vents:

Vent Placement Recommendations

High / Exhaust Vents Needed:
(Within 3' of Ridge Assembly)

Low / Intake Vents:
(Within Lower 1/3 of Attic)

Total Square Feet of Attic Space to be Ventilated

Total Square Feet of Attic Space to be Ventilated:

1,260

Code Required Method:

1/150 (STANDARD)

Calculation:

1,260 ÷ 150 = 8.40 sq. ft. of Code Required Ventilation

Convert square feet of code-required ventilation to square inches

Square Feet of Code Required Ventilation:

8.40

Calculation:

8.40 x 144 = 1,209.60 sq. in. of Code Required Ventilation

Square Inches Provided:

(18 x 72) = 1,296 sq. in.

Composition shingle

Low Profile (Tapered)

NET FREE VENTILATION AREA
1/4" Noncombustible, Corrosion-Resistant Wire Mesh	72 sq. in.

Figures based on independent evaluation reports.