If you’re curious what is celotex made of, it’s essentially a rigid PIR foam board with protective foil layers, a design that makes it effective for insulating homes and buildings while staying manageable and easy to install. The College of Contract Management offers courses that deepen your understanding of such modern building technologies, helping you advance in the construction se... https://www.uniccm.com/blog/celotex-what-is-it-uses-benefits-applications-in-insulation