MI Windows and Doors

MI Windows and Doors is a large-volume manufacturer of vinyl and aluminum residential windows and doors, headquartered in Gratz, Pennsylvania. The company produces single-hung, double-hung, casement, sliding, and bay/bow windows alongside patio and entry doors, serving new construction and replacement markets across the Eastern United States.

MI Windows and Doors operates multiple manufacturing facilities and distributes through a broad network of wholesale distributors, building material dealers, and home centers. The company is part of MITER Brands, one of the largest fenestration manufacturers in North America, which also owns Milgard, PGT Innovations, WinDoor, and NewSouth Window Solutions.

MI products target the production homebuilding and mid-market replacement segments, with an emphasis on energy efficiency, consistent quality at volume, and broad regional availability through its distribution network.