Our Company

When it comes to replacing your home’s windows and doors, we know that you have many choices. But if you are looking for the “perfect combination” of superior product quality, value and responsive customer service, look no further than AHT Wisconsin Windows.

We’ve been taking good care of our neighbors from Green Bay to Oshkosh, Neenah to Wausau, Madison to Beaver Dam, Reedsburg to Whitewater – and everywhere in between! – for more than 50 years. That makes us one of the most experienced Wisconsin replacement window contractors, and for good reason. You can read what some of our happy customers have to say about us if you click here.

Our Mission: Value for Generations

For 50 years AHT Wisconsin Windows strives to exceed our customer’s expectation by providing quality, professional installation by master craftsmen, and a dedication to delivering customer satisfaction. Every transition will portray a level of openness, honesty, and integrity expected of an industry leader, thereby securing the trust and confidence of our customers, as well as, controlled sustained growth for employees, vendors, and sponsoring communities.

Local People, Local Expertise

Much of our success is due to the fact that we’re from right here. We understand Wisconsin weather and Wisconsin folks. We all grew up around here and our staff and their families are part of the community. We treat every job like we were doing the work for neighbors because we are doing the work for neighbors!

By the way, we do all the work ourselves. We do not use subcontractors or outside labor for our installations. Our installation teams are fully trained, certified and experienced. And because we use only our own people we have full control over scheduling and quality.

Read more about our company’s history by clicking here.


Some window companies offer a manufacturer warranty on window parts. AHT Wisconsin Windows is one of the few replacement window companies in Wisconsin to offer a full 50-year non-prorated warranty on our windows. The warranty is not pro-rated and is fully transferable if you sell your home. No worries with us!

Licensed, Certified and Insured for Your Protection

AHT Wisconsin Windows is a licensed contractor in the State of Wisconsin, and we carry full liability and workers’ compensation insurance coverage for every job. Why is that important? If you choose a contractor who is not insured and an accident occurs on the job site, you may be held liable! AHT Wisconsin Windows makes sure you are protected.

In addition, we are fully certified by the manufacturers of the windows and doors that we install. Because we are certified all manufacturer warranties are valid and in full effect. Installation by a non-certified contractor may mean that the warranty is invalid.

And, We’ve Won Some Awards

People other than our customers think we are OK, too. AHT  Wisconsin Windows has been on lists and won awards from credible organizations like……

We must be doing something right.

Doesn’t This Sound Like a Great Company to Work With?

Your search for the right Wisconsin replacement window company is over. AHT Wisconsin Windows has everything you want in a window contractor, all delivered in a friendly, efficient and affordable way. Let’s talk about your home’s windows and doors today!

We’d be happy to provide a free estimate. Just call us toll-free at (888) 874-9339, or click here to schedule a free, no obligation in-home estimate.