SUPERWOODTM patented impregnation method makes the world's best boards. It resembles and weighs the same as untreated wood and yet it is protected right into the centre. This means that the board is optimally protected against rot and fungus - and you can plane, drill and cut as much as you like without destroying the protective properties. This is why SUPERWOOD is so perfect as cladding for gables, fascia, barge boards, decks, noise barriers, carports, sheds etc. SUPERWOOD is not suitable for constructions which are in permanent ground or water contact.