Proper Slope

See what can happen to multiwall polycarbonate on less than 5% (1/12) pitch
– Condensation will not effectively drain out of the sheet.
– Leaks at lower edge much more likely.
– Capillary action will suck water up the channels.
– Mold & mildew will gather, turn black and never go away.

Worst case photo, heavy pollen, virtually no slope, never washed.
mold
Step 2  Base & Cap Install System
Back to Step 1  Multiwall Poly Selection & Pricing 8, 10 & 25mm        • Or just Quote & Order Online

Polycarbonate Greenhouse and Sunroom Building Supplies