You do not need to go back to school to understand the building science behind roof ventilation “The basic breakdown”
Home owners and professionals alike have questions and concerns about how to properly ventilate their roof. Which roof vents are best based on roof type, climate, and budget for example: We want to share those questions and answers with you.
Question: What are the building code requirements for ventilating a roof?
Answer: 1 square foot of ventilation for every 300 square feet of space for pitched roofs with vapor barriers 1 square foot of ventilation for every 150 square feet of space no vapor barrier and for some municipalities in hot climates
1,000 Divided by 300 = 3.33 Total Square Feet. 50% Intake 1.7 Sq. Ft. & 50% Exhaust 1.7 Sq. Ft 1,000 Divided by 150 = 6.66 Total Square Feet 50% Intake 3.3 Sq. Ft. & 50% Exhaust 3.3 Sq. Ft.