Palram\'s 4\' x 6\' Skylight shed is built from Polycarbonate panels with aluminium and galvanised steel frame. Polycarbonate is a durable, virtually unbreakable and UV and harsh weather resistant. Polycarbonate panels are actually stronger than polypropylene or polyethylene panels. The key feature of the shed is polycarbonate Skylight. The roof panels transmit natural light into the shed for usability all day long. The Skylight roof has safe opaque external visibility also prevents harmful UV rays from entering the shed and damaging your stored items. This shed is maintenance free and washable. No painting or surface treatment are needed. This shed must be anchored to the ground to ensure it can withstand extreme weather. It can be anchored on to a solid surface such as wood, concrete or metal (anchoring screws not included with shed).