How to Choose the Best Vinyl Casement Windows

If you're replacing basement windows or upgrading your home's exterior, vinyl casement windows are worth understanding before you decide. They're one of the few window styles that open to their full frame size, which matters a lot more than it sounds — especially for basements. This guide covers how casement windows work, how vinyl basement windows compare to other options like glass block, and what to expect from installation in Mokena, Illinois.

What Are Vinyl Casement Windows?

Vinyl casement windows are hinged on one side and open outward using a hand crank, creating a full, unobstructed opening rather than a sliding sash that blocks part of the frame. Built with vinyl frames, they're designed for a weather-tight seal when closed and a clear, unbroken view when open.

How Do Vinyl Casement Windows Work?

A casement window operates on a crank mechanism connected to hinges along one side of the frame. Turning the crank pushes the window outward like a door, rather than sliding vertically or horizontally. When closed, the sash compresses against the frame, creating a notably tight seal against drafts and water.

Why Are Vinyl Casement Windows a Popular Choice for Basements?

Basements have specific requirements that make casement windows a strong fit:

• Egress compliance: Since casement windows open to their entire frame size, they're easier to size for legal egress requirements in bedrooms — generally a minimum 5.7 square feet of clear opening, at least 24 inches high and 20 inches wide, with a sill no higher than 44 inches from the floor.

• Full ventilation: The entire opening allows airflow, unlike sliders or double-hung windows where only half the frame opens.

• Tighter seal against moisture: Below-grade basements deal with more water exposure, and a casement's compression seal helps resist leaks better than some sliding styles.

Exact egress requirements can vary by local building department, so it's worth confirming specifics with your municipality before finalizing a basement window plan.

Benefits of Vinyl Casement Windows

• Strong ventilation thanks to a full, unobstructed opening

• Energy efficiency when paired with double-pane, Low-E glass and argon gas fill

• Easier cleaning, since the sash swings open for full access from inside

• Egress-friendly sizing, useful for basement bedrooms with code requirements

• Low maintenance, since vinyl frames don't rot, warp, or need repainting

Risks and Considerations Before Choosing Casement Windows

• Outward swing means they're not ideal directly beside walkways, decks, or high-traffic areas

• Crank mechanisms can wear over time and may eventually need adjustment or replacement

• Slightly higher cost than basic slider windows in some cases, depending on size and features

• Screens sit on the inside, which some homeowners find less convenient than exterior screens

When Should You Choose Vinyl Casement Windows for Your Basement?

Casement windows make the most sense when a basement room needs to meet legal egress requirements, when you want both ventilation and a clear view rather than obscured glass, or when the space will function as a bedroom, office, or living area rather than strictly mechanical or storage space.

How Vinyl Casement Window Installation Works

1. Request a free quote and consultation to discuss your goals and budget.

2. On-site measurements are taken to custom-fabricate windows that fit your exact openings.

3. One-day installation, where the crew removes old windows, sets the new units, and seals every edge.

4. Insulation and caulking are applied to eliminate gaps for air and water infiltration.

5. Exterior trim capping creates a maintenance-free finish around the new windows.

6. Final cleanup, with all debris hauled away and the work area left spotless.

How to Choose the Right Basement Window Solution for Your Mokena Home

Questions to Ask Before Deciding

• Does this room need to meet legal egress requirements for a bedroom?

• Is natural light and a view a priority, or is privacy more important?

• Do you want ventilation built into the window itself?

• How much security and impact resistance does the space need?

When Glass Block Might Be the Better Choice Instead

If the basement space is used for storage, laundry, or a mechanical room rather than a bedroom, glass block's added security and privacy often outweigh the need for a clear view or egress-sized opening.

Why Homeowners in Mokena Choose Legacy Glass Block & Window Co.

Legacy Glass Block & Window Co. has been family-owned and operated in Mokena since 1986, backing every vinyl casement window, glass block installation, and full window replacement with a lifetime warranty. Every window features vinyl frames with double-pane, Low-E glass and argon gas fill, installed in a single day with zero money down and 0% financing available. The company serves homeowners throughout Will, Cook, and DuPage counties, including Mokena, Frankfort, Joliet, New Lenox, and Orland Park.

Ready to upgrade your basement or home windows? 

Call 708-247-2044 or get a free quote from Legacy Glass Block & Window Co.

Frequently Asked Questions

What are vinyl casement windows? 

Vinyl casement windows are side-hinged windows that crank open outward, creating a full, unobstructed opening. Their vinyl frames provide a tight seal against drafts and moisture when closed.

Are casement windows good for basements? 

Yes. Their full-frame opening makes them well-suited for basement egress requirements and ventilation, while their compression seal helps resist moisture common in below-grade spaces.

What's the difference between vinyl casement windows and glass block basement windows? 

Casement windows offer a clear view, full ventilation, and egress-sized openings, while glass block prioritizes security, privacy, and near-zero maintenance but typically isn't used where legal egress is required.

Do casement windows meet egress code requirements? 

When properly sized, casement windows can meet typical egress requirements, generally a minimum 5.7 square feet of clear opening with specific height and sill restrictions. Always confirm exact requirements with your local building department.

How much do vinyl casement windows cost? 

Cost depends on window size, number of units, and home-specific factors. Legacy Glass Block & Window Co. offers free, no-obligation quotes along with 0% financing and zero-money-down options.

How long does casement window installation take? 

Legacy Glass Block & Window Co. completes most full window replacement projects, including casement windows, in a single day, from removal through final cleanup.

Are vinyl casement windows energy-efficient? 

Yes. When paired with double-pane, Low-E glass and argon gas fill, casement windows offer strong thermal performance and a tight compression seal that reduces drafts.

Can casement windows be used for bedroom egress windows? 

Yes, casement windows are a common choice for bedroom egress windows since their full-frame opening makes it easier to meet minimum clear opening requirements compared to sliding styles.

What's the difference between casement and double-hung windows? 

Casement windows crank open outward for a full opening and tighter seal, while double-hung windows slide vertically and only open partially at a time, though they offer a more traditional look.

Do vinyl casement windows require maintenance? 

Very little. Vinyl frames don't rot, warp, or need repainting, though the crank mechanism should be checked periodically to ensure smooth operation over time.

Is glass block better than vinyl windows for basement security? 

Glass block generally offers stronger impact resistance and is more difficult to force open, making it a common choice for basement areas where security and privacy matter more than a clear view.

What areas does Legacy Glass Block & Window Co. serve? 

Legacy Glass Block & Window Co. serves homeowners throughout Will, Cook, and DuPage counties, including Mokena, Frankfort, Joliet, New Lenox, and Orland Park, Illinois.

Final Thoughts

Choosing between Vinyl Basement Windows and glass block for your basement comes down to what the space actually needs — a clear view and ventilation, or maximum security and privacy. Both are solid, long-term investments when installed correctly, and Legacy Glass Block & Window Co. has been helping Mokena-area homeowners make that decision for over 40 years, backed by a lifetime warranty and flexible financing.