sheathing
sheath.ing \'she--thin, -thin\ n 1: the action of one that sheathes something 2: material used to sheathe something; esp : the first covering of boards or of waterproof material on the outside wall of a frame house or on a timber roof
sheath.ing \'she--thin, -thin\ n 1: the action of one that sheathes something 2: material used to sheathe something; esp : the first covering of boards or of waterproof material on the outside wall of a frame house or on a timber roof