Flat Roofing solutions- EPDM rubber membrane

the rubber is great for residencial and small commercial... maybe a way to use the container as a building as a site?

http://www.flatroofsolutions.com/

this a company that deals with EPDM roofing. this is a link to the portion of their site that discusses the green qualities of the product.

http://www.versico.com/index.cfm?act=Guide

GORE™ TENARA® Architectural Fabric

http://www.gore.com/en_xx/products/fabrics/architectural/gore_tenara_textile_products.html

Structures for the roofing

here are simple metal roofing trusses that are built to be outside although they are not that big.

http://www.clearspan.com/farm/supplies/home

http://www.sheltersofamerica.com/productdetails.php?productid=139&id=6

Velco product!

http://www.fastenation.com/category.php?id=254&crumbs=145,254