Metropolitan Window Company, a family owned and operated business, is the Home of the Infinity from Marvin Fiberglass Replace ... ment Window, the Best Home Replacement Windows in Pittsburgh. Metropolitan Windows Replacement Windows have been chosen for over three decades because of quality products, professional installation, and personal service. We specialize in a variety of standard and customized Fiberglass Replacement Windows as well as an array of other product materials, styles, and shapes to best meet your home improvement needs. read more