Polycarbonate is a versatile, tough plastic used for a variety of applications, from bulletproof windows to compact disks (CDs). The main advantage of Polycarbonate over other types of plastic is its great strength combined with light weight. Polycarbonate is nearly unbreakable. Bulletproof windows and enclosures as seen inside banks or at drive-throughs are often made of Polycarbonate. Add to this the advantage that it is just 1/6 as heavy as glass.
Polycarbonate sheets will protect you from icicles, hailstones, heavy rain and piling up snow to enter & exit to your house.
Brackets are also made in polycarbonate, give you a strong hold to your wall in a large volume of snow or heavy rain. It is also very lightweight for your easier installation.