WeatherGard Windows - Michigan Made As a family-owned company, WeatherGard, has the largest window factory in Southeast Michigan. We understand Michigan's unique climate. That’s why, for over 35 years, each and every WeatherGard window has been built by Michigan workers for Michigan residents. Located in Farmington, our premium windows are custom made to your exact specifications. Offered in an array of colors, shapes, styles, and stained wood finishes. Professionally installed for maximum energy efficiency and backed with a lifetime guarantee. We also offer additional home improvement services including ProVia entry doors, roofing, insulation, gutters, and James Hardie and vinyl siding with free no-obligation estimates.