Carpenters work on almost any construction site imaginable. Carpenters are some of the first workers on a jobsite, and some of the last to leave. They assist in site preparation; build concrete forms and decks; frame walls and roofs; hang interior and exterior walls; install windows, doors, acoustical ceilings, countertops and trim; and install locks, hardware and specialty furniture. Work can be indoors or outdoors and is physically demanding. Carpenters generally work in five different areas, including wood framing, interior systems, concrete form work, exterior finish and interior finish.