What are the requirements for egress windows?

The minimum net opening area in accordance with the 2021 IRC section R310.1 is 5.7 square feet. Minimum net opening height is 24 inches and the minimum net opening width is 20 inches. The bottom sill height shall be no more than 44 inches from the floor.  The minimum horizontal area of the window well shall be 9 square feet, with a minimum horizontal projection and width of 36 inches.  Ladder and steps are required when the depth is greater than 44 inches. To obtain more information please call (406) 455-8431.