This polycarbonate greenhouse is a great garden building perfect for growing a wide range of vegetables. This spacious metal greenhouse has a strong aluminium frame which has been coated in green or silver paint for a stylish finish. The aluminium frame has been treated so it is extra strong and resistant to corrosion. Features and Benefits Features; integrated rain gutters for water collection and roof window for ventilation Strong frame; Made from durable. rustproof aluminium that is low maintenance and doesn't require paint or treatment Glass-free; Lightweight yet strong 4-millimetre UV twin wall polycarbonate panels provide excellent heat retention and diffuse even sunlight Sliding door; The sliding door design wont slam shut in strong winds and maximises usable space Each greenhouse has twin-wall. eco-friendly 4mm thick polycarbonate glazing for an insulated environment The free running. sliding door means space inside the constructions can be maximized and integral gutters help c