Looks like black vinyl or cloth sheets of material stretched between two rows of black pvc pipe. Can see some exposed wiring and the pipe on the close end of the roof
Vinyl Roofing at Lowes.com
TPO and PVC Roofing membrane - Single Ply Commercial Roofing
The 6 Types of Vinyl Siding | Xterior
Suntuf 26 in. x 12 ft. Polycarbonate Corrugated Roof Panel in Solar Grey 101931 - The Home Depot
Whole Home Makeover - Metal Roofing, Vinyl Siding, Stone & Doors | Kline Home Exteriors
Flat Roof Construction in the Pacific Northwest — Soldano|Luth
Tuftex SeaCoaster 2.17-ft x 12-ft Corrugated Clear PVC Plastic Roof Panel in the Roof Panels department at Lowes.com
Types of Vinyl Siding Accessories to Have Your House Stand Out - Advanced Roofing & Siding Inc.
Will Your Roofing Shingles Hold Up Against a Hurricane? | Marshall B&R
Waterproof PVC membranes for roofing, ceiling and flooring
Metal Roofing vs. Corrugated Plastic Panels
Environmental matters: The value of vinyl | Direct Roofing & Contracting
Vinyl vs Fiberglass Roof - An Overview - Blogging Junction
Are Vinyl Cedar Shake Shingles Really A Better Alternative? | Brava Roof Tile
Mainely Vinyl » Roofing
Recycled Plastic Roof Tiles Gain In Popularity - Polychem USA