Window Concepts of Milwaukee, Inc. has helped Wisconsin homeowners replace their old drafty windows and update their exterior siding since 1989. Our mission is quite simple—partner with high quality manufacturers and provide the professional installation and service Wisconsin homeowners deserve. Our Concept-1 window glass package not only includes state of the art energy saving coatings, but it is also built with your family’s safety and security in mind. Our insulated siding system is available in a wide range of colors as well as a variety of exterior profiles that will add a current and elegant look to your home. All replacement window and siding products are backed by our Satisfaction Guarantee or money back policy.