The 6 green 200mmx200mm oak posts, eaves beams and curved braces are made from Premium D30 grade French Oak factory manufactured in traditional methods using full timber joints and with square cut rafter feet sitting on Granite Saddle Stones. Our dark grey Aluminium Ladder Roof System sits seamlessly in with the Oak Rafters creating a fully weather proof system that is available to use and relax under any time of year if used as a garden canopy. Engineered in Cambridge by Glasslightpower and a UK first Roof can have integrated deep flo guttering too.