Good quality UPVCwindows and doors offers ultraviolet resistance and don't fade due to heat, humidity or pollution. UPVC doors are made by encasing an insulated steel frame in un-plasticized polyvinyl chloride (UPVC) to create a sealed unit which is strong and thermally-efficient. UPVC doors do have a plastic finish, but they're an affordable and effective solution to stylishly secure any home. UPVC is a low maintenance material, unlike natural materials which require annual sanding, varnishing and repainting. Windows & doors made from UPVC can last for decades without any sign of weathering, the only upkeep is a wipe down clean with soapy water to prevent staining and remove grim or dirt.