If I could review this product at ZERO STARS, I would.  I spent over $500.00.  It took me by myself three days to assemble.  Product states it could handle 60 mile winds.  When I finally  had this greenhouse assembled, it blew away anchored down and completely destroyed this greenhouse.  Cheap materials and Palram full of lies!  I KNOW YOU DONT KNOW ME, BUT STAY AWAY FROM ALL PALRAM GREENHOUSES.  I went out the next day and purchased PVC pipe and 6mm plastic for under $275.00.  F is the grade I would give this product.  I contacted Palram and they basically told me I'm outta luck!