Founded in 1947 as the Wisconsin Knight Door Company, Lifetime Doors designs, develops, manufactures, distributes and markets a full line of unfinished, prefinished, flush and molded door products and related hardware throughout the United States. Lifetime s door products include a wide variety of hollow core, solid core, bi-fold, fireproof, prehung, panel and machined doors. The company employs more than 500 highly skilled craftsmen and maintains its corporate offices and a manufacturing facility in Farmington Hills, Mich. Lifetime Doors has additional production facilities in Illinois, Texas, Michigan, Pennsylvania, South Carolina and California.