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Overlapping rows of shaped tiles or shingles that resemble overlapping fish scales; see imbrication.

In built-up roofing systems, an opening where one felt layer overlaps another; caused by a wrinkle at the overlapping edge.

A glue made from fish skins and bladders; similar to animal glue.

In plastering, a spot in the finish coat approximately 1 €ž4 in. (6.4 mm) in diameter, caused by lumpy lime.