MI Windows and Doors
Wholesale Building MaterialsPennsylvania, United States1001-5000 Employees
MI Windows and Doors is a U.S. manufacturer of windows and doors serving residential and light commercial applications through wholesale building materials channels. The company is headquartered in Gratz, Pennsylvania, with fabrication plants spread across the United States and an approach that emphasizes people and entrepreneurship. Founded in 1947, it has grown into a well-established player in the field. It operates within the wholesale building materials sector and maintains a nationwide production footprint to supply projects with its products. In June 2026, the company announced the forthcoming Carbonite Collection, expanding its product portfolio. The business’s long history and broad production network position it as a notable participant in the U.S. window and door market.
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