Casement Windows: Built For Airflow, Sealed Against The Weather
A Different Way To Open A Window
Instead of sliding up or down, a casement window is hinged on one side and cranks open outward, like a small door. That single difference changes what the window is good for: casement windows catch side breezes that a sliding or double-hung window would miss entirely, and they close against the frame tightly enough to create one of the best seals available in any window style.
Green Country Windows installs casement replacement windows for homeowners throughout Tulsa and the surrounding area. We’re locally owned and family operated, and every estimate we give is the same one we’d want if we were the ones buying: transparent, in writing, and free of pressure to decide on the spot.
Where Casement Windows Earn Their Keep
The crank mechanism is what makes casement windows practical over a kitchen sink, a countertop, or anywhere else you can’t easily reach to push a sash open. Because the sash presses into the frame rather than sliding past it, casement windows also tend to leak less air than other operable styles, which shows up on your energy bill more than most people expect.
With our Oklahoma climate expertise, we typically recommend dual-pane, Low-E glass for casement windows facing west or south, where wind-driven rain and direct summer sun are the two things worth planning around.
What Goes Into Every Installation
We measure and square every casement window by hand, since a crank mechanism that’s even slightly out of alignment will bind or stick within a year. Multi-point locking hardware, a range of frame colors, and upgraded glass packages are all available, and we’ll walk you through which ones are actually worth paying for based on where the window sits and how you use the room.
Security is another reason homeowners choose casement windows: because the sash locks into the frame at multiple points when cranked shut, it’s a harder window to force open from the outside than a sliding or single-latch style. That’s a detail worth knowing if you’re replacing windows on a ground floor.
How We Handle The Installation
1. Free Estimate
A no-pressure, in-home consultation and a transparent estimate for your specific project.
2. Precise Measurement
We measure each opening by hand to make sure the crank mechanism will operate smoothly for years, not just on installation day.
3. Installation
We remove the old window, set the new one level and square, and test the crank action before we consider the job finished.
4. Warranty
Manufacturer and workmanship coverage on every casement window we install.
Casement windows are one of several styles available through our window replacement services. Visit our Window Replacement page to see the full range of options we install.
Ready To Get Started?
Call (918) 888-6574 for a free, no-pressure estimate, or send us a message through our contact form. Financing is available for qualified homeowners, and every installation is handled by our own experienced crew.
Frequently Asked Questions About Casement Windows
It depends on size, count, and the features you choose. We give you a detailed, transparent estimate up front, no surprises later.
Often, yes. Their compression seal tends to leak less air than sliding or double-hung windows when installed correctly.
Most homeowners do fine with dual-pane, Low-E glass. Triple-pane is available if you want it, and we’ll help you weigh whether it’s worth the added cost for your home.
That’s one of the most common places we install them, since the crank makes them easy to open and close in tight spots.
Very little. Occasionally lubricating the crank mechanism and keeping the track clear of debris is usually all it takes to keep them operating smoothly for years.