CLAPBOARD (ARCHITECTURE)

'Clapboard', also known as 'bevel siding' or 'lap siding' or 'weather-board' (with regional variants as to the exact definitions of these terms), is a board used typically for exterior horizontal siding that has one edge thicker than the other and where the board above laps over the one below. It is often found in New England architecture.
In newer, cheaper construction, clapboard is often imitated as "siding" made of vinyl, aluminum, or fiber cement.