International Fireproof Door Co., Inc is one of Americas oldest manufacturers and distributors of fireproof doors and windows. Founded in 1935, International specializes in supplying that "hard-to-find" fireproof window or door to the building design, construction and real estate industries. Whether you need a single kalamein door prepared for installation into an existing door frame, a door with our innovative angle-iron frame or a total package of hollow metal doors and frames complete with all locks and hardware installed, International will meet your specs in a timely fashion with highly competitive pricing. In addition our rated lot-line fireproof window has long served as the industry standard. These self closing windows are available with a variety of fireproof glazing options and are available factory-glazed to speed up your field installation.