Thirty-four years after the company’s founding, MI began fabricating vinyl windows in 1981 and has been expanding ever since. With the addition of Milgard Windows & Doors to the company in 2019, MI has become one of the largest manufacturers of vinyl windows in the country. Between MI and Milgard, their products reach all 50 states and parts of Canada. Both companies’ windows and patio doors have become favorites of homeowners and builders due to their aesthetic appearance, overall performance, ease of use, and builder-friendly qualities.