above is james and chris doing the very dangerous work of putting on the polycarbonate roof panels dave, another friend, spent the entire next day helping . zoom. greenhouse made from old windows easy to do. 1700-c on the back deck as greenhouse and sun/rain room. balance 8\u2032 x 8\u2032 hobby greenhouse \u2013 green 763552428400. modern greenhouse umbracle city of arts and science valencia | modern greenhouses. he builds a greenhouse from old windows.