THEBCO is a locally-owned business serving the Madison area since 1976. We specialize in replacement windows, entry and patio door installation and siding replacement throughout the Madison, Wisconsin area. We offer excellent customer service and warranty on our products and services. We are experienced in residential and commercial installation. All of our employees take pride in the quality of our services and customer satisfaction.

Thebco’s approach is to do things right. We have thrived on repeat customers and referral business over the last 48 years.  Our A+ Rating with the Better Business Bureau and great reviews on Google and Angie’s List are proof of the quality of our work.

We will respect your time, your budget and your decision.  We are the most trusted window replacement company in the Madison, WI area.

Restorations Windows


Inspired by the beauty and craftsmanship of traditional wood windows, the strength and durability of FiberCore™ and the ease of maintenance of vinyl window systems, Restorations Windows are the clear choice for homeowners all across America.

Restorations windows are one of the best replacement windows available in the Madison area. Our windows are energy efficient, manufactured with the environment in mind and covered by the industry’s best lifetime warranty.

Your new windows beautifully frame your view from the inside of your home, and your neighbors will envy the look of your home from the curb.

New Vinyl Siding


Low-maintenance vinyl siding from Mastic and composite cladding from Ascend are the top choice for exterior siding replacement.

Professionals and homeowners prefer home siding made of vinyl, composite, fiber cement, brick or stucco options. And it’s easy to see why Mastic and Ascend composite cladding are homeowner favorites for exterior siding updates.

Our siding products feature the beauty of freshly painted or stained wood without the stress of peeling paint. Whether you choose lap siding or vertical siding, you get a beautiful exterior product that’s built to last. Every home siding style is beautiful, durable and easy to maintain.

Waudena Doors


A beautiful entry creates a dramatic first impression and a welcome focal point for your home. Make that first impression a distinctive one with an entry door system from Waudena™. Waudena™ door systems are built with lasting value and performance using premium quality components and workmanship.

Waudena has become the recognized leader in the industry for supplying only the highest quality products while providing a great value for your dollar. We use only American-made components in the construction of all of our door units and every door is Wisconsin-made in Wausau, WI.


Thousands of people have chosen our products and we appreciate each and every one! As a bonus to our valued customers we offer a $100 check for every verified sale provided by your recommendation. If you’d like to participate please do not hesitate to contact us.

Customer Referral

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