Clapboard

Building siding of horizontal boards

Clapboard ( or), also called clabbard, bevel siding, lap siding, and weatherboard, with regional variation in the definition of those terms, is wooden siding of a building in the form of horizontal boards, often overlapping. Clapboard, in modern American usage, is a word for long, thin boards used to cover outer walls and (formerly) roofs of buildings. Historically, it has also been spelled clawboard and cloboard.

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