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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.

Vinyl Replacement

Casement / Awning Windows

Simple sophistication provides a clean, modern look for nearly any architectural design Add light, charm and a new design twist to any room
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High-Performance and Impact Windows

Impact and High-Performance Windows are built to safeguard your home during the most perilous weather conditions Impact and High-Performance Windows are rigorously tested and approved to meet or exceed the stringent building codes required for many coastal areas These vinyl extrustions are built to withstand the extreme heat and humidity common to coastal regions
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Swing & Clean Windows

Swing
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Garden Windows

Now you can have fresh flowers or herbs in your home throughout the year, right in the room where they'll bring you the most pleasure
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Bay & Bow Windows

Bay and bow windows let you change the basic architectural look of your home - inside and out Bay and bow windows create an instant feeling of added spaciousness and light Bay and bow windows create dramatic new appearances, adding style to the exterior of your home
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Awning Windows

The unique design of this expertly crafted window will impart a bold statement of elegance and style Awning windows open up and out and can easily be paired with fixed-lites Awning windows add both a visual interest and increased ventilation to your home
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Casement Windows

The definitive choice for beauty, elegance and style Simple beauty and superior design shine through in every Alside Casement Window The slimmest profile in the industry offers a better view from anywhere in your home
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Excalibur® II Fusion-Welded Vinyl Windows

A great choice for maximum beauty, strength and energy savings Excalibur II Windows are inspired by what homeowners want most: year-round energy savings, enduring beauty and excellent value Create a dramatic look for your home with increased glass space that lets light in - and keeps the elements out
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Sheffield® II Fusion-Welded Vinyl Windows

The ultimate choice for maximum beauty, strength and energy savings Sheffield II provides outstanding performance that starts with innovatively engineered components and provide the basis for superior energy savings Built for exceptional appearance and trouble-free operation
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Model 0700 Single-Hung Vinyl Windows

The best solution for residential and light commercial applications The sleek lines surrounded by an appealing beveled mainframe make the Model 0700 a wise choice
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Fusion™ Quality Vinyl Windows

Designed to provide energy efficiency and thermal protection year-round Quality craftsmanship means your windows will maintain their attractive appearance inside and out with minimal upkeep Premium vinyl mainframe and sashes won't rot, split, corrode or pit
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Mezzo® Energy-Efficient Vinyl Windows

Designed to meet stringent 2015 ENERGY STAR® requirements Narrowline frame and sash maximize daylight visibility Sash-to-sill interlock design provides maximum performance and beauty Composite meeting rail reinforcement provides strength and minimizes energy transfer
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UltraMaxx® Fusion-Welded Vinyl Windows

The perfect window with endless beauty, strength and energy savings UltraMaxx's outstanding performance starts with innovatively engineered components that provide the basis for superior energy savings Built for superior appearance and ease of operation
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Sheffield® Fusion-Welded Vinyl Windows

The ultimate choice for maximum beauty, strength and energy savings Sheffield's outstanding performance starts with innovatively engineered components that provide the basis for superior energy savings Built for exceptional appearance and trouble-free operation
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Design Showcase

Design Showcase

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

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Siding Style Guide

Siding Style Guide

Get help selecting siding that coordinates beautifully with your exterior.

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Siding Features and Options

Siding Features & Benefits

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

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