Specialized Drywall, also known as OJ Insulation, is a California-based company specializing in insulation services for both residential and commercial properties. Founded in 1984, they offer a range of solutions, including radiant barrier, commercial foil, fiberglass, cellulose, and rigid foam board installations. Their expertise extends to attics, walls, and crawl spaces, aiming to enhance energy efficiency and comfort for homeowners and businesses.