What is the standard attic ventilation requirement ratio specified in the California Residential Code for naturally ventilated attics?
Correct Answer
A) 1 square foot of vent area for every 150 square feet of attic floor
California Residential Code Section R806.2 requires 1 square foot of vent area for every 150 square feet of attic floor area (1:150 ratio). This can be reduced to 1:300 if a vapor barrier is installed and vents are balanced between intake and exhaust.
Why This Is the Correct Answer
California Residential Code Section R806.2 requires 1 square foot of vent area for every 150 square feet of attic floor area (1:150 ratio). This can be reduced to 1:300 if a vapor barrier is installed and vents are balanced between intake and exhaust.
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