Roofing Ventilation Calculator
Available on Google Play
3.7(5)
1,000+ installsFreeBusiness
Updated Jun 3, 2026 · v2.1.20
Calculate the amount of products needed to properly ventilate an attic space.
The Ventilation Calculator from CertainTeed is the ideal tool for quickly determining the amount of ventilation products needed to outfit an attic space with proper balanced ventilation. Simply enter the length and width of the attic space or the overall square footage of the space and the Ventilation Calculator produces results based upon the NFA 1/300 rule.
10 years on Google Play
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