Polycarbonate Positioning and Attachment – Minimum roof slope 5 degrees (1/12 pitch. To Base & Cap System
Sheet Installed with ribs vertical on walls, with the slope on roof. Channels drain moisture. If horizontal mold gathers. Install with ribs vertical – same direction as sheet length * Sheet size listed is width x length
In extreme wind conditions mid-sheet fastening, and blocking or purlin positioning, may be 3 feet or closer. Increase quantity of screws in mid sheet to every 12″ for wind speeds 110-130 mph. 10″ for wind speeds 131-150 mph. 8″ for wind speeds 151 or greater.
See Mid-Sheet Fastening for Placement of Spacers – if Rafter Framing and blocking set back 1/4″.
See 8 – 25mm Polycarb some are 20 Yr Warranty – Lexan Thermoclear is clearly the industry leader