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Address:
4199 Mount Verde Dr, Norco, CA 92860
Total Vents (Exhaust & Intake):
14
“Where do I install the vents?”
Vent Placement Recommendations
High / Exhaust — Off-Ridge Vents:
(Install within 3' of Ridge Assembly)
(Min. 40% / Max. 50%)
7
Low / Intake — Off-Ridge Vents:
(Install within Lower 1/3 of Attic)
(Min. 50% / Max. 60%)
7
Comp Roof Drawing

Roofing Material Manufacturer Warranties Require the Compliance with Building Code Attic Ventilation Formulas

Total Square Feet of Attic Space to be Ventilated
Total Square Feet of Attic Space to be Ventilated:
1,828
Code Required Method:
1/300 (EXCEPTION)
Calculation:
1,828 ÷ 300 = 6.09 sq. ft. of Code Required Ventilation
Convert square feet of code-required ventilation to square inches
Square Feet of Code Required Ventilation:
6.09
Calculation:
6.09 x 144 = 876.96 sq. in. of Code Required Ventilation
Square Inches Provided:
Off-Ridge (14 x 72) = 1,008 sq. in.
Ventilation Solutions for All Roofs and Climate Conditions
Composition shingle Off‑Ridge Vents
Low Profile (Tapered)
NET FREE VENTILATION AREA (Figures based on independent evaluation reports)
Traditional 26 Gauge G90 Galvanized Steel; 1/4″ noncombustible corrosion‑resistant wire mesh.
WeatherMaster 26 Gauge G90 Galvanized Steel; 1/4″ noncombustible corrosion‑resistant wire mesh AND patented stainless steel fine/flexible wire filament.
Noncombustible, Corrosion‑Resistant Wire Mesh
Low Profile (Tapered) vent
Low Profile (Tapered)
High / Exhaust 50%
Low / Intake 50%
72 sq. in. per vent
*Brands and Trademarks may vary by region.
Questions?
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