DWELLING AND DECK #1 DEHESA RD. EL CAJON, CA 92019
Total Square Feet of Attic Space to be Ventilated
Total Square Feet of Attic Space to be Ventilated:
2041'
Required Method:
1/300
Calculation:
2041 ÷ 300 = 6.80 sq. ft. of Code Required Ventilation
Convert square feet of code-required ventilation to square inches
Square Feet of Code Required Ventilation
6.80
Calculation:
6.80 x 144 = 979.20 sq. in of Code Required Ventilation
Select Material and Determine Vents Required
Material:
Composition shingle
Placement
Square Inches Provided:
(10 x 98.75) = 987.5 sq. in
Square Inches Needed:
6.80 x 144 = 979.20 sq. in
High / Exhaust Vents Needed:
5
Low / Intake Vents Needed:
5
Total Vents Needed:
10
Material:
Composition shingle
Product:
Low Profile - "Tapered"
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
