spatterdash

spatter +‎ dash (“to throw violently”), (cement-based slurry): from the technique used to apply spatterdash to a wall.

spatterdash (plural spatterdashes)

1. A cement-based slurry applied to a wall in order to improve adhesion of the render.
   • 1972, Leslie Albert Ragsdale, Ernest Albert Raynham, Building Materials Technology, page 126:

     A spatterdash treatment consisting of a cement:sand slurry may be used over the surface of these bricks to provide a mechanical key for rendering.

   • 1986, John van Winden, Wolfram Pforte, Fritz Hoherlein, Rural Building: Basic Knowledge, volume 2, page 178:

     Spatterdash can be used to produce an attractive appearance, or it can be applied before plastering in order to make a good surface for the plaster or render. Spatterdash is a wet, rich mix of cement and sand, called a slurry. This sand and cement is mixed to a proportion of 1:1,5 or 1:3. This slurry is thrown hard, or spattered, against the smooth block or concrete surface, and then allowed to harden.

2. singular of spatterdashes (“type of boots”)

• spatterdashed (adjective)
• spatterdashes (“leg coverings”)
• splatterdash

spatterdash (plural spatterdashes)

1. (transitive) To apply spatterdash to.

• harling
• pebble dash