With plants across the country, MI Windows and Doors is one of America's most respected manufacturers of vinyl, aluminum and composite window and door products. Since 1947, we've focused on great people making great products. To us, "Seeing You Through" is a philosophy that goes beyond the factory, beyond the warehouse, and right into each home and construction site. It's what drives us to manufacture products that are complete, accurate and delivered on time. But most of all, it's why our customers place their trust in us.