Guide
Egress code for bedroom windows
Egress is the requirement that catches the most replacement projects, commercial and residential alike, and it catches them after the window is already installed.
Request a QuoteShort answer
A window serving a sleeping room must provide a minimum clear opening for escape and rescue. The measurement is taken on the new operable unit after installation, not on the old opening.
What is being measured
Egress is evaluated on the clear opening the window actually provides when it is fully open: the unobstructed width, the unobstructed height, the total clear area, and how high the sill sits above the finished floor. Frame, sash, and hardware all subtract from it.
That last part is why a like-for-like replacement can fail. Setting a new frame inside the existing frame — an insert or pocket replacement — shrinks the clear opening on all four sides. A window that was compliant for decades stops being compliant the day it is replaced.
Where it applies
Sleeping rooms are the primary trigger, in single-family homes and in multi-family buildings alike. Basement sleeping areas carry the requirement too, which is where window wells and their own dimensional rules come in.
Exact figures come from the code edition in force for your municipality and your project scope, so they are confirmed against the current adopted code for the specific job rather than quoted from memory.
How it gets solved
Where the clear opening will not work, the answer is usually a different operation type or a full-frame replacement rather than an insert. A casement, for example, swings the entire sash clear of the opening and produces far more clear area than a comparable double-hung at the same rough opening.
- Full-frame replacement
- Removes the old frame entirely and preserves the opening size.
- Change the operation
- Casement units usually recover clear opening that a slider loses.
- Confirm before ordering
- Egress is verified at measure, not discovered at inspection.
Ready to put numbers to it
The quote form branches by buyer type, so you only answer the questions that apply to your project.