Roughcast or pebbledash is a coarse plaster surface used on outside walls that consists of lime and sometimes cement mixed with sand, small gravel, and often pebbles or shells. The materials are mixed into a slurry and are then thrown at the working surface with a trowel or scoop. The idea is to maintain an even spread, free from lumps, ridges or runs and without missing any background.
Roughcast used to be a widespread exterior coating given to the walls of common dwellings and outbuildings, but it is now frequently employed for decorative effect on country houses, especially those built using timber framing (half timber). Variety can be obtained on the surface of the wall by small pebbles of different colors, and in the Tudor period fragments of glass were sometimes embedded.
Pebble-dashing is a type of roughcasting where the surface coating is of small stones, chips of stones or gravel that are thrown at a coat of wet plaster while it is still 'soft'. Though it is an occasional home-design fad, its general unpopularity is estimated to reduce the value of a property by up to 5%.
Roughcasting incorporates the stones in the mix while pebbledashing adds them on top.
- ↑ Encyclopædia Britannica Eleventh Edition (1910–1911)
- ↑ Research performed for Direct Line Insurance, published 2006.
See also Edit
This article incorporates text from the Encyclopædia Britannica, Eleventh Edition, a publication now in the public domain.
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