We provide transparency to ensure you get exactly what you need, and our certified master installers will work with you until you are one hundred percent satisfied. Change your view on window replacement. Request a FREE quote today!

Windows of Wisconsin is a Member of the Brown County Home Builders Association
Windows of Wisconsin in Green Bay and the Fox Cities is a Top 500 Remodeler
Windows of Wisconsin is Better Business Bureau Accredited with an A+ Rating
Diamond Partner Replacement Windows from Infinity by Marvin in Green Bay and Appleton
Replacement Window and Door Installation Masters in Green Bay and Appleton

Fiberglass Replacement Windows in Green Bay and Appleton, WI

Ultrex® Fiberglass
Outperforms Vinyl and Wood
Get more for your money with our fade-resistant and maintenance-free replacement windows.
Infinity from Marvin
Built For Life
Windows of Wisconsin is extremely proud to offer Infinity from Marvin replacement windows.
Award Winning
Replacement Window Installation
Windows of Wisconsin prides itself on quality craftsmanship and has an award winning team.
Replacement Window Showroom
Off Hwy 41 in Kaukauna
Visit the largest replacement window showroom in Northeast Wisconsin.

Financing Available

For qualified buyers. Call for details.

Replacement Windows Reviews from Homeowners Like You

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Replacement Window Specialists

The team at Windows of Wisconsin prides themselves on making sure the the job gets done right and that our customers get the best service possible from start to finish. Our no pressure sales team will be happy to show you the superior features of our windows as well our custom color matching, and window installation process.

Windows of Wisconsin has been locally owned and operated since 1997 by Certified Master Window Installer Carl Hardtke. The Hardtke family has a long and reputable history in the local Green Bay area construction industry.

Award Winning
Top 500 Remodeler

Reliable Service
Highly Rated

Window Showroom
Largest in NE Wisconsin

Expert Installers
Experienced and Trained

Replacement Windows Are Color Matched to Match Existing Trim PRIOR to INSTALLATION!

Unlike other replacement window companies Windows of Wisconsin color matches our Infinity from Marvin replacement windows to match the existing trim in your home. After consulting with the homeowner our expert stain matching team formulates the perfect color at our facilities which will maintain the beauty and continuity of the woodwork in your house. A sample of the custom formulated stains are approved by the homeowner and applied to the windows prior to installation. This ensures a hassle free and no fuss process that eliminates follow up visits and third party painters. Once your windows are installed you can enjoy the appearance and superior performance of the engineered EverWood interior woodgrain finish.

Service Area Map of Fiberglass Replacement Window Dealer and Installer in Appleton and Green Bay, Wisconsin

Proudly Serving Northeast Wisconsin

  • Fox Cities
  • Appleton
  • Kaukauna
  • Oshkosh
  • Green Bay
  • De Pere
  • Manitowoc
  • Kohler
  • Stevens Point
  • Oconto
  • Shawano
  • Door County
  • Sturgeon Bay
  • Sister Bay
  • And More!