ThermaGlas Multi-wall Polycarbonate Sheet is designed and engineered specifically for commercial or large hobby greenhouse use. ThermaGlas offers 99.5% UV protection.   
16mm Triple Wall
Superb thermal insulation—saves energy
Impact resistance—virtually unbreakable
Light weight
Weather and UV resistant
Low flammability (available with CC1 rating)
Easy to work with and install using ordinary tools
Rigid, yet capable of cold-forming to an arch
Wide service temperature range
10-year limited warranty
Can be easily cut in any pattern using a circular saw with a fine tooth blade
76% light transmission
Approximate Weight: 16mm = .55 lbs per sq. ft.