roughcast

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roughcast

[′rəf‚kast]
(civil engineering)
A rough finish on a surface; in particular, a plaster made of lime and shells or pebbles, applied by throwing it against a wall with a trowel.

rock dash

An exterior stucco finish containing crushed rock, large pebbles, or shells that are imbedded in a stucco base; also called pebble dash or slap dash.