Sheathing

Term Definition
Sheathing

Sheathing generally refers to the heavy, rough boards that cover the timber frame of a mid-eighteenth through early-twentieth century house and to which the exterior siding is attached. Today, Plywood, introduced in the 1920s, is used for sheathing in house construction. Sheathing, which can be attached to the frame diagonally, but most often runs vertically on the wall, stiffens the frame and provides additional protection against wind and water infiltration.

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