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Address:
118 Mapache Portola valley Ca
Total Square Feet of Attic Space to be Ventilated
Total Square Feet of Attic Space to be Ventilated:
4000'
Required Method:
1/150
Calculation:
4000 ÷ 150 = 26.67 sq. ft. of Code Required Ventilation
Convert square feet of code-required ventilation to square inches
Square Feet of Code Required Ventilation:
26.67
Calculation:
26.67 x 144 = 3840.48 sq. in of Code Required Ventilation
Square Inches Provided:
(28 x 98.75) = 2765 sq. in
Square Inches Needed:
26.67 x 144 = 3840.48 sq. in
Where do I install vents graphic
Vent Placement
High / Exhaust Vents Needed:
14
Low / Intake Vents Needed:
14
Total Vents Needed:
28
Composition shingle
Low Profile (Tapered)
NET FREE VENTILATION AREA
Wire Mesh 98.75 sq. in
Figures based on independent evaluation reports.
Comp Roof Drawing
Questions?