What is polycarbonate sheet? The polycarbonate light sheet of Green Roofing is a material used widely in construction and decoration thanks to the ability to get good light, durability and aesthetics. In particular, polycarbonate sheets are often applied in the installation of roofs for areas such as garden, garage, or even car roof. However, on the market today there are many types of polycarbonate panels with different quality, from high -class to poor quality goods. To make sure you buy quality roof products, you need to know how to carefully check before deciding. Here are some detailed steps to help you check the quality of the polycarbonate plate effectively.