What to Expect from an Egress Window Install
A step-by-step homeowner's guide to egress window installation β why it matters, what code requires, and what a quality install looks like.
Updated April 17, 2026
An egress window is two things at once: a building-code safety requirement and one of the best upgrades a basement can get. If you're finishing a basement, renting out a basement apartment, or just want the option of natural light and a safe exit, this is the right project.
Why egress matters
Building codes in Indiana require any basement bedroom to have an egress window β a window large enough for an adult (or firefighter in full gear) to exit through in an emergency. That's the floor. The real value goes further:
- Natural light transforms how a basement feels β no more cave.
- Property value β egress basements count as livable square footage on appraisals. Non-egress basements don't.
- Resale β buyers specifically look for finished egress basements; non-egress finishes often have to be disclosed as non-conforming.
- Water protection when done right: the drainage design keeps the well from becoming a water collection point.
The install sequence
A Cornerstone install runs roughly like this:
1. Excavation β dig the well to well below the window opening. Size follows the window manufacturer's spec.
2. Saw-cut through the foundation β measured, chalked, cut with a concrete saw. Clean opening, no sledgehammer work.
3. Window and well install β window seated and flashed, steel well anchored to the foundation, ladder installed to code.
4. Drainage tie-in β this is the difference between a good install and a bad one. Well floor gets gravel bed + drain line tied to the footing drain or a sump pit. Water never pools in the well.
5. Special-order caps β we usually special-order the well cap so it fits your well exactly. Drainage, visibility, and snow/leaf protection matter.
6. Interior finish β drywall crew follows up to close up the rough opening and paint to match.
What to ask your contractor
- Where does the water go when it rains?
- Is the well properly backfilled and graded away from the foundation?
- Is the ladder to code for your jurisdiction?
- What's the warranty on the install?
Cornerstone's approach
We do these all the time, and we do them the long way β proper drainage, proper flashing, proper caps. No surprises when it rains. Free estimates, fair pricing, written scope.
Call (812) 850-5320.
