Polycarbonate roofing is generally replacing glass, toughened glass and polyethylene membrane in many fields such as agriculture, industry, public buildings and ornaments. It is a perfect combination of lightweight, high impact strength, light transmission, frame-resistance, UV protection, anti-drop as well as charming appearance. Polycarbonate sheets, especially solid polycarbonate sheets, such as embossed and frosted sheets, have extremely high impact strength. According to test data, impact strength of polycarbonate sheet is about 200 times higher than the common glass, and 2 to 20 times the tempering glass. They are quite suitable for places where has a high potentiality of encountering hail, high wind and storm rain.