When you wonder what is celotex made of, know that it’s made from a closed-cell PIR foam core with reflective foil facings, giving it excellent thermal performance and moisture resistance for floors, walls, or roofs. The College of Contract Management provides training that helps professionals understand these materials and apply best practices on site. A wise move for a stronger care... https://www.uniccm.com/blog/celotex-what-is-it-uses-benefits-applications-in-insulation