IRC Roof Ventilation Code: NFA, Baffle Requirements, and Powered Fan Mistakes
IRC roof ventilation requirements aren’t just about adding vents—they’re a critical system to prevent moisture, heat damage, and premature roof failure. This guide breaks down everything inspectors, contractors, and serious DIYers need to know about the 2021 IRC ventilation requirements (R806), what manufacturers expect, how to calculate Net Free Area (NFA), and what goes wrong … Read more