FiberFrame windows, patio doors, storefront and sunrooms are manufactured by Comfort Line Limited. It was with great foresight and vision that in the 1980’s Comfort Line introduced the first fiberglass window made in the U.S market. Comfort Line is a family owned business that began in 1959 in Toledo, Ohio and we’ve been leading in the window and door industry ever since.

Comfort Line introduced the first fiberglass window ever made over 30 years ago. Recognizing the performance advantages of pultruded fiberglass, Comfort Line’s leadership took bold and innovative steps to be the first to apply this high quality, high performance material to the residential windows, patio door and the commercial window industry. Our FiberFrame line not only introduced the first fiberglass window frame, it also introduced the first fiberglass sliding patio door to the residential market and storefront system to the US commercial market.