Lath
A lath is a thin, narrow strip of some straight-grained wood or other material, including metal or gypsum. A lattice, or lattice-work, is a criss-crossed or interlaced arrangement of laths, or the pattern made by such an arrangement. Lath is the basic material used in the formerly common building technique known as lath and plaster, which was used to make interior walls.
Name
The word stems from Old English laett, Mid. Eng. lappe, a form possibly due to the Welsh liath; the word appears in many Teutonic languages, e.g. Dutch lat, German Latte, and has passed into Romanic, cf. Italian latta, French latte), denoting a thin, flat strip made of wood or possibly another material.
Uses
Today, laths are still used in building construction to form a base or groundwork for plaster (modern lath and plaster applications are mostly limited to conservation projects)[1], tiles, slates, and other coverings, e.g. roofing. Such strips of wood are also employed to form lattice-work, or are used as the bars of venetian blinds or shutters. Riven lath is the stronger forerunner to sawn lath, as it was traditionally split with the grain from chestnut, oak, or similar hardwoods. Laths were also used to fix reed to a timber structure before plastering.
Lath cut from spruce or balsam fir trees are used for building wooden lobster traps.
Historical significance
A window with a lattice painted red was formerly a common inn-sign (cf. Shakespeare, 2 Hen. IV. ii. 2. 86); frequently the window was dispensed with, and the sign remained painted on a board.
Gypsum lath consists of gypsum plaster sandwiched between two sheets of absorbent paper. It was invented in 1910, and multiple variations were developed in the 1930s. Gypsum lath is commonly used in place of wood since it is noncombustible, easy to use, and gives better results. The lath and plaster method's popularity declined in the 1950s, as it was replaced by the more efficient drywall.
See also
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This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed (1911). Encyclopædia Britannica (11th ed.). Cambridge University Press.
References
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