Pergola Top – Detail of top of Pergola, Awning, Skylight and other applications – See Screws that come with Base & Cap, then Screw counting for screws used in body of sheet and perimeter and U-Profile Screws. This will assist in preparing to achieve a watertight detail. – Print page or detail and refer to. U-Profile Install Tips
See 8 – 25mm Polycarb some are 20 Yr Warranty – Lexan Thermoclear is clearly the industry leader