The Billy Oh Hobby Green Polycarbonate Greenhouse, is a great addition to any garden, new improvements have made assembly a simpler process, whilst the powder coated frame ensures rust resistance, requires no maintenance & offers a great finish... This hybrid design combines twin walled polycarbonate panels in the roof for added strength & heat retention with single walled polycarbonate glazing in the walls to give balanced sunlight exposure during the day. Furthermore, these panels are 100 UV protected so will not turn yellow after prolonged exposure.. For simple assembly, polycarbonate panels slide into the aluminium frame & are locked without any additional parts. The Hobby greenhouses include a galvanized steel base & hinged door. To enhance air circulation & balance humidity & temperature these aluminium greenhouses also include a vent window as standard