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A lath is a thin, narrow strip of straight-grained wood used under roof shingles or tiles, on lath and plaster walls and ceilings to hold plaster, and in lattice and trellis work.〔"Lath" def. 1. ''Oxford English Dictionary'' Second Edition on CD-ROM (v. 4.0) © Oxford Universityhhow Press 2009〕 ''Lath'' has expanded to mean any type of backing material for plaster including a metal wire mesh or expanded metal that is applied to a wood or metal framework as matrix over which stucco or plaster is applied and wallboard products called gypsum or rock lath.〔Ching, Frank. ''A visual dictionary of architecture''. New York: Van Nostrand Reinhold, 1995. 198. Print.〕 Also reed mat was historically a lath material. One of the key elements of lath, whether wooden slats or wire mesh, are the openings or gaps that allow plaster or stucco to ooze behind and form a mechanical bond to the lath where gypsum lath relies more on a chemical bond.〔 ==Etymology== The word is recorded from the late 13th century and is likely derived from the Old English word *''læððe'', a variant of the word ''lætt''. This in turn would seem to stem from a Proto-Germanic word *''laþþo'', from which have sprung words in many Germanic languages, e.g. Dutch ''lat'', German ''Latte''; the root has also found its way into Romance languages, cf. Italian ''latta'', French ''latte'', and is related to German ''lade'', ''laden'' denoting a board, plank, sash, shutter, counter and hence also a shop.〔"Lath" def. 1. Whitney, William Dwight, and Benjamin E. Smith. ''The Century dictionary and cyclopedia''. vol. 4. New York: Century Co., 1901. 3364. Print. http://triggs.djvu.org/century-dictionary.com/djvu2jpgframes.php?volno=04&page=695 accessed 1/11/2014〕〔(Online Etymological Dictionary's entry for "lath" )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「lath」の詳細全文を読む スポンサード リンク
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