Customization meets common sense.
With a design pressure (DP) rating tested for the commercial marketplace and the ability to be glazed on the inside for easy installation, our single-hung and sliding windows are perfect for projects from luxury hotels and resorts to office spaces and modern homes.
A thermally broken aluminum option makes the Series 610 and 620 energy-efficient. And because each is designed to integrate with our large sliding glass doors and fixed windows, there are nearly infinite ways to customize.

Western Window Systems Introduces New Single-Hung and Sliding Window
– October 26, 2016 – Western Window Systems today introduced the Series 610 Single-Hung and…

Western Window Systems Introduces New Energy Efficiency Web Page
Already sought after by architects and builders for their built-to-last manufacturing, smooth operation, and modern…

WWS Wins Best Metal Windows
For the third year in a row, Western Window Systems has won Best Metal Windows…
“They’re the only manufacturer that cares about details the way I do.” Emilio Locascio, Gemini Development
Clean Design
Engineered for smooth operation, maximum ventilation, and a modern aesthetic, our single-hung and sliding windows are designed with premium hardware and a 4.5” frame depth
Mulling Options
Both window styles can be directly mulled to most of Western Window Systems’ product lines such as hinged doors, sliding doors, and fixed window walls. This male/female mulling feature is unique in aluminum fenestration products and eliminates the need for operable inserts while maximizing glass and narrowing sight lines.
Locking System
A positive-acting T-lock engages an integrated strike in the frame’s center bar. Available in black and brushed nickel finish.
Screening
After-market screening solutions are available. Screening is not available through Western Window Systems.
Tested for Durability
Because we build and test our windows to last, you can enjoy your Western Window Systems product for years to come. Manufactured in the U.S., each of our product families is tested for air, water, and structural performance and certified by the NFRC (National Fenestration Rating Council) and AAMA (American Architectural Manufacturers Association).
Climate Ready Glass
We use dual-paned low-E glass for better energy performance. Glass can be customized in a variety of types, colors, and thicknesses for improved privacy, protection, and thermal efficiency.
“They’re the only manufacturer that cares about details the way I do.” Emilio Locascio, Gemini Development
Aluminum Finishes
Aluminum finishes for the Series 610 Single-Hung and Series 620 Sliding Window are available in-stock, as designer selections, and can be customized to match nearly any color. Samples shown are representative only. For exact paint swatch samples, contact us.
In-Stock Finishes
Bronze Anodized and Satin Anodized aluminum come standard with a Class 1 coating thickness for increased smoothness and durability.
Designer Finishes
Our designer colors are based upon popular paint choices in the homebuilding industry and include a high-quality paint finish that conforms to a minimum rating of AAMA-2605, currently the highest rating for organic finishes.
Custom Finishes
Have a specific color in mind? We can customize the color of your Series 610 Single-Hung and Series 620 Sliding Window to match virtually any finish.