Address:
9767 Dunbar Ln El Cajon, CA 92021
Total Square Feet of Attic Space to be Ventilated
Total Square Feet of Attic Space to be Ventilated:
1190'
Required Method:
1/300
Calculation:
1190 ÷ 300 = 3.97 sq. ft. of Code Required Ventilation
Convert square feet of code-required ventilation to square inches
Square Feet of Code Required Ventilation
3.97
Calculation:
3.97 x 144 = 571.68 sq. in of Code Required Ventilation
Select Material and Determine Vents Required
Material:
Composition shingle
Placement
Square Inches Provided:
(8 x 72) = 576 sq. in
Square Inches Needed:
3.97 x 144 = 571.68 sq. in
High / Exhaust Vents Needed:
4
Low / Intake Vents Needed:
4
Total Vents Needed:
8
Material:
Composition shingle
Product:
Low Profile - "Tapered"
Comp Roof Drawing
Benefits of Attic Ventilation
1. Extends the roof's life
2. Curb appeal
3. Balanced System
4. Fits with Solar Systems
5. Validate the Warranty
6. Enhances Above-Sheathing Ventilation (ASV)
7. Reduces Moisture/Removes Trapped Gases
8. Energy conservation