In architecture, a chantlate is a piece of wood fastened near the ends of the rafters, and projecting beyond the wall, to support two or three rows of tiles, so placed to prevent rain water from trickling down the sides of the wall.
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References
This article incorporates text from a publication now in the public domain: Chambers, Ephraim, ed. (1728). "Chantlate". Cyclopædia, or an Universal Dictionary of Arts and Sciences (1st ed.). James and John Knapton, et al.