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Series 9500 Bi-Fold Window

Panoramic views meet remarkable performance.

Perfect for entertaining places like patios and decks, opening up a kitchen to the outdoors, or creating a relaxing window seat to a spectacular view, the Series 9500 Bi-Fold Window makes any room look and feel more spacious. Designed to smoothly stack and fold against side walls, it creates a huge opening from corner to corner, connecting the indoors with the outside.

Sealed stainless steel ball bearing rollers allow for easy operation. Subjected to air, water, and structural tests, the Series 9500 features dual-paned low-E glass to reflect heat while allowing light to pass through. And because it’s aluminum, it’s low maintenance, too.

Plus, options such as flush and water barrier sills, inswing and outswing capabilities, and countless sizes, configurations, and finishes let you customize the Series 9500 Bi-Fold Window to your individual style.

Series 9500 Bi-Fold window
"The efficiency and airflow in regard to the heat and the cold is amazing."Sharon Newman, homeowner

Product Features

Clean Design

Designed for strength as well as the ability to blend into nearly any space, the Series 9500’s 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 window 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

The Series 9500 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 window includes a hidden stainless steel multi-point lock to secure its large panels, providing additional strength and protection.

Heavy Duty Hardware

For strength and durability, Western Window Systems uses stainless steel hardware for its windows.

Configurations and Sizes

The Series 9500 Bi-Fold Window is available in a multitude of configurations, with panels up to 42' wide and 12' tall (16 panel maximum, eight in each direction). For additional flexibility, the Series 9500 can be specified to swing inward or outward.


Sill Tracks

Water Barrier Sill

Designed for effectiveness in all climates, the water barrier sill safeguards against water intrusion while providing a tight seal. In top-hung bi-fold windows, where the weight is concentrated in the heads, the interior leg is 1.82”. For bottom-loading bi-folds, where the bottom of the window carries the majority of the weight, the interior leg is 2.51”. Thresholds are finished to match the frame color.

Flush Sill

Top-hung bi-fold windows feature an interior threshold height of 1.07”. On bottom-loading bi-folds, the interior threshold height is 1.76”. Thresholds are finished to match the color of the frame.

Note: The flush sill is not warrantied against water penetration.

U Track

For bi-fold windows intended for interior use only, the U track allows for a flush transition and is offered in a dark bronze finish.


Handles and Locking

High-Quality Handles

Designed for durability and comfort, our bi-fold windows feature three high-quality, contemporary-style handles. The premium handle, located on all active panels, includes a key lock. A D-shaped pull handle, at the bi-fold’s pivot points, further aids in opening and closing the window. And an inactive lock handle, at the window’s pivot points, secures the panels with steel pins at the head and sill.

Premium and inactive lock handles are available in brushed nickel or black. The D-shaped pull handle is available in stainless steel or black bronze.


Aluminum Finishes
Satin Anodized
Dark Bronze
Hillside Bronze
Bison Beige
Stonish Beige
Autumn Night
Cinnamon Toast
Western White

Aluminum Finishes

Aluminum finishes for the Series 9500 Bi-Fold 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

Dark bronze 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 9500 Bi-Fold Window to match virtually any finish.