Sun Structure Designs, Inc.

Double Hung Casement Sliding Awning Bow & Bay Sliding Doors French Doors Single Doors

Double-Hung Windows

Four Seasons views you as the artist re-creating the canvas you call home, and we can help you bring form and function together. Our Double Hung window is just the first example. Where others look at this as a “standard” window, ours is anything but. The design possibilities and dependable performance act in harmony to complement your creative side.

We’ve designed our windows to capture the great looks of traditional windows, with features to enhance your home’s functionality. Our double contoured, narrow-line exterior mainframe adds striking curb appeal to your home, while our exclusive mortised locks and wood-style coved trim around the glass creates the combination of beauty and craftsmanship.

More Viewing Visibility than Other Windows

It’s easy to see that the Four Seasons Double Hung window (versus our competitor’s window) provides greater viewing area from inside your home, while allowing in up to 30% more light.

Double-Hung Windows
Double-Hung Windows Double-Hung Windows


Minimal maintenance and easy operation with tilt-in feature, contoured lift-rails and pre-tensioned, dual pulley Block & Tackle balance system

Advanced, triple weather- stripping seals for top efficiency performance

Single Hung and Oriel/Reverse Oriel also available

Polyurethane window frame insulation provides added comfort and the ultimate in energy efficiency

Coved interior glazing bead for added elegance

Added security with recessed pick-resistant locks

Extruded aluminum screen frame with heavy-duty aluminum corner reinforcements for years of worry-free performance
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