Siding is the material used to cover the exterior of a house. Clapboards and shingles are the most common wooden materials used for siding. Many variations in the dimensions and applications of wood siding are possible, including shiplap, tongue-and-groove, drop (or novelty), flushboard (both horizontal and vertical), and board-and-batten.
Historically, the materials used for clapboards included cedar, oak, white pine, redwood and Douglas fir. Most clapboards today are of western red cedar. Shingles have historically been produced from white and red cedar and cypress.