A casement window is hinged on the side and opens outward with a crank. Because the sash presses against the weatherstripping like a door, casements seal exceptionally well — among the most airtight, energy-efficient window styles you can buy. They also catch side breezes and offer a clean, unobstructed view with no meeting rail across the middle. Casements are a favorite over kitchen sinks and in hard-to-reach spots where a crank is easier than lifting a sash.
Benefits of Casement Window Replacement
- Superior air-seal — the sash locks tight against the frame
- Full, unobstructed views and lots of natural light
- Easy crank operation, ideal over counters and sinks
- Catches and directs breezes for excellent ventilation
- Multi-point locking for added security
Our Installation Process
Every casement window replacement project follows the same proven, AAMA-standard process — the details that keep water out of your walls and your manufacturer warranty valid.
- Precise field measurement of every opening
- Careful removal of the old window (EPA Lead-Safe on older homes)
- Inspection and prep of the rough opening
- New unit set level, plumb, and square
- Low-expansion insulation and correct flashing
- Interior and exterior sealing, trim, and cleanup
See exactly how window installation works →
What Affects the Cost
Pricing is quoted per project after an in-home measurement. The main factors:
- Window size and quantity
- Frame material (vinyl, wood, fiberglass, aluminum)
- Glass package (Low-E, argon, dual vs. triple pane)
- Insert vs. full-frame installation
- Custom shapes, capping, and permits
Read the full window replacement cost guide →
Casement Window Replacement FAQs
Are casement windows more energy efficient than double-hung?
Generally yes. The sash compresses against the frame’s weatherstripping when closed, so casements typically have lower air-leakage ratings than sliding or hung styles.
Do casement windows work with screens?
Yes — the screen mounts on the interior side since the glass swings outward, so bugs stay out while the window is open.