Proper Slope Polycarbonate For Success

Proper Slope is polycarb. sheet crucial. See what can happen to multiwall polycarbonate on roof pitch of less than 5 degrees.  Do not install poly sheet on flat roof or pergola.
Base & Cap Install System 

– Proper Slope or 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.

See 8-25mm Polycarbonate, some 20 yr Warranty &  Base-Cap Install System for Multiwall Polycarbonate

 

Polycarbonate Greenhouse and Sunroom Building Supplies