Polycarbonate roofing panels are thermoplastic panels typically used for decks, garages, sheds, and patios. They’re lightweight and can withstand extremes of heat and cold, which makes them a good choice for Wisconsin. Polycarbonate has 50 times the impact strength of float glass and 30 times the strength of acrylic. They’re available in clear, white, or colored sheets and can be ordered with UV protection.