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Thermo-Twin Windows has been providing window solutions to the Pittsburgh and Erie regions for 50 years. Founded in 1972, we've evolved from being a glass supplier to the window manufacturer and remodeling company that we are today. Our expertise is in designing, manufacturing and installing windows, sunrooms, doors, and patio rooms. We're proud to be an employee-owned company, and we've made it our priority to deliver quality products made locally in Pittsburgh, PA.