Replacement Windows for St. Louis Area Homes
Casey Exteriors installs two proven vinyl window lines: ViWinTech, our main line, and Mezzo by Alside. Two lines means we can match the right window to your home and budget instead of selling you the only thing we carry. Every window is measured, installed, sealed and trimmed by Casey Exteriors.
Family owned since 1996. Compare both lines in person at our Arnold showroom.
Choose Your Window Line
Both lines are energy efficient vinyl replacement windows that never need painting. They differ in color options, black window technology, series choices and warranty terms. Click a logo to explore each line.
Our main line. American made in Paducah, Kentucky, with three replacement series so you can choose your balance of features and price.
- Three replacement series: 1000, 2000 and 6000
- ThruBlack: vinyl that is black all the way through, inside and out
- Grand Vista sliding patio doors to match
- Limited Lifetime Warranty for the original homeowner
A slim, narrowline window with a larger glass area, built for energy performance and backed by a warranty that can transfer when you sell.
- Narrowline frame with fusion welded corners and expanded glass area
- ClimaTech glass, including ClimaTech PriME, which Alside says meets ENERGY STAR Most Efficient criteria
- 13 exterior colors, including black, and woodgrain interiors
- Lifetime Limited Warranty that transfers once if you sell
ViWinTech vs. Mezzo: Which Window Is Right for You?
Here is how the two lines compare. At your estimate we will price both for your exact openings so you can decide with real numbers.
Swipe the table sideways to compare.
| Feature | ViWinTech | Mezzo by Alside |
|---|---|---|
| Manufacturer | ViWinTech Windows & Doors | Alside (Associated Materials) |
| Made in | Paducah, Kentucky | Custom crafted in America |
| Choices | 1000, 2000 and 6000 Series | One line, four ClimaTech glass packages |
| Styles | Double hung, casement, awning, picture, bay and bow, garden, sliding, specialty shapes | Double hung, single hung, sliding, picture, casement, awning, special shapes |
| Black windows | ThruBlack through color vinyl (1150 Series window and Grand Vista door) | Black laminate exterior color |
| Colors | White or tan interiors, oak and cherry on the 6000 Series, several exterior colors | 13 exterior colors, 6 woodgrain and 3 solid interior finishes |
| Energy | Can be built to meet ENERGY STAR in every U.S. region | ClimaTech PriME meets ENERGY STAR Most Efficient criteria (per Alside) |
| Warranty | Limited Lifetime, original homeowner, not transferable, register within 90 days | Lifetime Limited for the original owner, transferable once, prorated up to 20 years from install |
| Glass breakage | Included on the 6000 Series, optional on others | Optional |
| Patio doors | Grand Vista Traditional, French and Multitrack | Ask us |
Choose ViWinTech if
- You want true black vinyl (ThruBlack)
- You want to compare three price points
- You want matching Grand Vista patio doors
- You want glass breakage coverage included (6000 Series)
Choose Mezzo if
- You want the widest color and woodgrain choices
- You want a narrowline frame with an expanded glass area
- You want ENERGY STAR Most Efficient glass (ClimaTech PriME)
- You may sell and want the warranty to transfer
Signs You Need Replacement Windows
Drafts and cold spots
You can feel air moving near the window on a windy day, or the room never gets comfortable.
Fog between the panes
Condensation between the glass means the seal has failed and the insulating gas is escaping.
Hard to open or lock
Sashes that stick, drop or will not lock are a comfort problem and a safety problem.
Soft or rotting frames
Wood that is soft, peeling or stained around the sill lets water into the wall.
Rising energy bills
Older single pane or failed double pane windows make your heating and cooling work harder.
Outside noise
New insulated glass and tighter seals noticeably quiet a room facing a busy street.
How Window Replacement Works with Casey
Free estimate
We measure every opening, check the frames for rot or water damage and walk you through both window lines.
Compare in person
See samples side by side in our Arnold showroom at 1366 Jeffco Blvd.
Custom built
Your windows are made to your exact measurements. We schedule install as soon as they arrive.
Install and finish
Old windows out, new windows set, insulated, sealed and trimmed, with cleanup and haul away.
Which is better, ViWinTech or Mezzo?
Neither is better for every home. ViWinTech gives you three price points, true through color black vinyl and matching patio doors. Mezzo gives you the most color choices, a slim narrowline frame and a warranty that transfers once if you sell. We price both at your estimate so you can compare.
Can I get black replacement windows?
Yes, two ways. ViWinTech ThruBlack is black all the way through the vinyl. Mezzo offers a black laminate exterior color. We will show you both in the showroom.
Are these windows ENERGY STAR rated?
ViWinTech windows can be built to meet ENERGY STAR requirements in every U.S. region, and Alside says Mezzo with ClimaTech PriME glass meets ENERGY STAR Most Efficient criteria. Whether a specific window qualifies depends on the glass package, so we spec your quote with that in mind.
Does the window warranty transfer if I sell my home?
The Alside warranty on Mezzo transfers one time, prorated, up to 20 years from installation. The ViWinTech Limited Lifetime Warranty covers the original homeowner and does not transfer.
Do you replace patio doors too?
Yes. We install ViWinTech Grand Vista sliding patio doors in Traditional, French and Multitrack styles.
Compare Both Window Lines in Person
Stop by our showroom at 1366 Jeffco Blvd in Arnold, or book a free in home estimate. We will measure, price ViWinTech and Mezzo side by side and give you a clear quote.
ViWinTech, ThruBlack and Grand Vista are trademarks of ViWinTech Windows & Doors. Mezzo, Alside and ClimaTech are trademarks of Associated Materials, LLC. Product features and warranty terms are summarized from manufacturer materials as of September 2026 and may change.