Timber is an essential part of just about every structure and it is the Carpenter's job to prepare it and put it into place. It involves using power tools and the use of traditional hand-skills such as measuring, marking, cutting, shaping, fitting and finishing. Carpenters work with wood mainly in the structure of a building - the roof, floor, and walls. This can include floor joists, floorboards, roof trusses and wall partitions. They may also fit staircases, doors, skirting boards, cupboards and kitchens..