2015 > 2018 IRC Attic Ventilation
- Burgess Team
- Apr 28, 2020
- 1 min read
Updated: Dec 27, 2022
The minimum amount of attic ventilation essentially doubled between the 2015 and 2018 IRC, and the location for lower vents was changed. Here's a detailed video explainer and a simple math shortcut to get the ventilation right every time.