Why Choose the Performance Line

Built into every Western Window Systems Performance Line aluminum moving glass wall and window is the belief that your design ideas and preferences, not energy or structural limitations, should determine the look of your project. The Performance Line addresses energy and structural requirements while promoting the thin profiles and large expanses of glass that have made Western Window Systems a centerpiece in so many homes. We put the control in your hands so the product you have in mind can be the product you see in the finished design.

Two massive multi-slide doors meet at a 90-degree angle.

Energy Performance. By Design.

The Performance Line is designed for pros who need the ultimate in energy efficiency. From a signature aluminum extrusion design to across-the-board low U-value ratings to low-E argon-filled dual-pane glass, it’s exceedingly capable. Even California’s rigorous Title 24 requirements are met in both the prescriptive and performance methods.

Powerfully Purposeful

Western Window Systems’ Performance Line was designed to meet the nation’s toughest building codes. Proprietary Insulbar profiles increase thermal performance and strength. Tested to a design pressure rating of 50 on sizes exceeding industry minimums, Performance Line moving glass walls and windows support triple-pane, laminated, and security glass. So you can worry less about standards and requirements and focus on doing your best work.
The second floor of this home has floor-to-ceiling multi-slide doors that connect to the balcony.

The Size You Want, Precisely

Your taste for large expanses of glass finds nearly limitless expression with Western Window Systems Performance Line. Choose completely customizable aluminum glass walls and windows that can go taller and wider than you’d expect. And because they’re easy to integrate, you can customize and expand in ways never before possible.
A graphic saying Aluminum versus Wood.

Forget What You Know About Wood

Say hello to an aluminum door and window line created to compete with wood products in every way. With its narrow sightlines, thermal technologies, and durability, the Performance Line from Western Window Systems allows you to meet stringent energy and structural needs while providing an unlimited number of design possibilities and a contemporary aesthetic.

A shop employee works on assembling a panel.

For Professionals

The details you need.

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How They’re Made

A Passion for Precision

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Large, divided light windows and multi-slide doors connect the patio to the great room.

Simulated Steel Line

The Performance Line Reimagined

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