Visit for more details :- http://www.roughbros.com/research-teaching-and-educational-greenhouses/products/roof-top-greenhouses/
See Rough Brothers works.
Rough Brothers was founded in 1932 as a maintenance and repair facility for greenhouses which were made out of redwood at the time. Over the last 80 years, Rough Brothers (pronounced Rauh) has evolved from that small workshop with a handful of employees to become the largest greenhouse and garden center manufacturer in North America. We are grateful to provide the glazed canopy for the garden center of both new and retrofitted Lowe’s stores on projects throughout the country.