This is brilliant for the middle and lower level. Screw the fiberglass panels that form the under-deck roof to the purlins. This will be great for a shed to stay dry under the deck.
translucent roof panel/corrugated fiberglass roof panels/clear fiberglass panels
Fiberglass Roof , Find Complete Details about Fiberglass Roof,Fiberglass Sheet Carport Roofing Material from Sun Sheets & PC Embossed Sheets Supplier or Manufacturer-Stoneworks Specialist Int'l.