Fireproof foam insulation roof sandwich panel pu polyurethane pir roof panel As a new material in structure, the polyurethane roof panel has been the most suitable choice for many users. The polyurethane roof panel is divided into two types: The three waves of polyurethane composite roof panel, The four waves of polyurethane composite roof panel. The characters of PU roof panel are heat insulation, waterproof, soundproof, and easy to install. The excellent function is the reason that so many people choice it as roof board.