Definition of scratch coat in English:

scratch coat

Line breaks: scratch coat

noun

North American
A rough coating of plaster scratched before it is quite dry to ensure the adherence of the next coat.
More example sentences
  • First, a scratch coat is troweled onto the lath; the plaster oozes through the lath and grips the backing when it hardens.
  • On smaller buildings, I combine the slip and scratch coats by making one sloppy, high clay-content plaster and mush that directly into the bales.
  • Mix and apply slurry coat to the existing scratch coat ahead of the render application ensuring that the render is squeezed into the wet slurry coat.

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