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The choice of builders for over two decades


The ability of a Western Window Systems’  Bi-Fold Door to completely open up to the outdoors is what makes it so unique. Designed to smoothly stack and fold against side walls, it creates a huge opening from corner to corner, connecting the indoors with the outside and expanding living space. Need everyday access? Opt for convenient single or double swing doors.

Thermally broken aluminum and dual-paned low-E glass make their doors energy efficient. And because it’s aluminum, it’s low maintenance, too. Sealed stainless steel ball bearing rollers allow for easy operation, even with extreme panel weights.


Beauty on the Bay


WWS’ Bi-Fold Door Finalist in Architizer A+ Awards


Energy Efficient

Clean Design

Designed for strength as well as the ability to blend into nearly any space, the contemporary look includes a 2.25” x 3.5” stile for additional glass and light, a concealed locking system, and a frame and sill depth of 4.50”, allowing it to integrate into nearly any wall condition.

Smooth Operation

Sealed stainless steel ball bearing rollers make our bi-fold door easy to operate.

Designed and 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

Doors features 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.

Thermally Broken Aluminum

Thermally broken aluminum provides an insulating barrier that increases energy performance.

Concealed Locking System

Our bi-fold doors include a hidden stainless steel multi-point lock to secure its large panels, providing additional strength and protection. A keyed cylinder option is available.

Heavy Duty Hardware

For strength and durability, Western Window Systems uses stainless steel hardware for its door systems. Our stainless steel head load carriers and hinges are capable of handling panels weighing up to 264 pounds. Bottom load carriers and hinges can accommodate door panels weighing up to 176 pounds.

Configurations and Sizes

The Bi-Fold Door System is available in a multitude of configurations, with panels up to 42′ wide and 12′ tall (not to exceed 264 pounds per panel). Sixteen-panel maximum, eight in each direction. For additional flexibility, the Series 9500 can be specified to swing inward or outward.