Atlas Signature Progressive Foam
Call us today!
815-547-0159

Request your
FREE QUOTE

For more than 40 years, GF Company has provided exceptional building products for homes and businesses in Northern Illinois. Our success is due to our strong customer focus and our commitment to using the most advanced technologies while providing superior craftsmanship for each and every job. GF Company offers a variety of window styles and configurations to enhance your home’s appearance and its energy efficiency. Our window product line includes a vast array of styles from traditional to contemporary while offering a variety of configurations, colors, grid patterns and glass styles to create the perfect finish for your home.

Sliding Patio Doors

Swing, Hinged and French Doors

Swing, Hinged and French Doors combine classic elegance with energy-efficient glass These doors serve as a stylish passageway for entry onto a deck or backyard area
View Details

A170 Series Sliding Patio Door

Get the most out of the spring and summer months with classic sliding patio doors, a perfect blend of beauty and energy efficiency Step into the beauty of your surroundings and create a majestic entry with patio doors
View Details

High-Performance and Impact Patio Doors

Enjoy the casual, carefree lifestyle of coastal living with peace of mind that your home is well protected from severe coastal weather Safeguard your home from challenging coastal weather
View Details

5100 Sliding Patio Door

Exceptional design for enhanced energy efficiency Beautiful choice for today's light-filled homes and multi-family structures
View Details

6100 Sliding Patio Door

GF Company's Alside Brand Patio Doors extend your home’s ambience to the great outdoors, visually expanding and brightening any room. And the expanded glass area means added light – so every season is more enjoyable.
View Details

Bradenton Premiere (6200)

The precision-built slimline profile allows ample glass exposure for a generous viewing area, yet provides outstanding protection from inclement weather. Position a transom window above your patio door to create a dramatic effect with added height and visual appeal. A variety of door styles and options lets you further customize the door to suit your décor.
View Details

Promenade Sliding Patio Door Collection

About Selecting the best patio door for your home is easy when you have three superb styles to choose from: Contemporary, Classic and French. Each Promenade Door is beautifully detailed to achieve a distinctive look while providing a powerful shield against inclement weather and energy loss. Promenade also incorporates Alside's more than 65 years of manufacturing excellence, further assurance of lasting quality and value. Precision-built with premium vinyl construction, ultra-efficient ...
View Details
Design Showcase

Design Showcase

Our interactive design tools let you create and print a custom plan for your project.

Learn More
Siding Style Guide

Siding Style Guide

Get help selecting siding that coordinates beautifully with your exterior.

Learn More
Siding Features and Options

Siding Features & Benefits

Browse features, colors and energy efficiency options for your new siding.

Learn More