About Window World of Southeastern Wisconsin

Over the past fourteen years, we have sold over 52 million dollars in windows, siding and entry doors to over 18,000 satisfied customers. We have professionally installed over 140,000 windows in southeastern Wisconsin. Over 60% of our business comes from referrals by past loyal customers. Window World of Southeastern Wisconsin, LLC has a Better Business rating of an A+ earned by our professional service and commitment we provide our customers.

Our Mission:

Our company takes pride in doing all our work with skill quality and integrity. We will make you our customer for life. We will treat your home as ours, be on time and always provide the best quality product at the lowest prices and professionally install them and serve you for life. We thank you for your interest and look forward to being of service.

We proudly sell and service our own windows and patio doors, Alside siding products and ThermuTru entry doors to our customers in Southeastern Wisconsin. Our quality products carry a Lifetime Product and Labor warranty on all our products. Our window products have earned the prestigious Good Housekeeping Seal of Approval. We give you peace of mind before, during and after our installation for years to come. We welcome you to Window World of Southeastern Wisconsin.

Our Service:

We’re in it for the long haul, we service all our products cradle to grave! We provide a full Lifetime warranty agreement that sets us apart from the rest. We hold up and keep to our warranty commitments. We will be there for you. Our company has full time service department that works for you and are experts on the products we serve and sell.

How we got started:

Garry and Frances Gantner had started their career’s at Window World of Southeastern Wisconsin in 2001, Garry working in sales and Frances in the office.

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A message to our customers regarding COVID-19