Cal Comfort Insulating Windows, Inc. began in 1982 as a company that primarily focused on weatherizing homes and commercial buildings, windows being more of a problem than a solution. Cal Comfort Windows, Inc. specialized in conscientiously installing windows and doors. Insulating, weather-stripping and correcting structural flaws were the best way to improve energy efficiency and reduce power bills. We serve Modesto, Turlock, Stockton, and the surrounding area.