A rough coating of plaster scratched before it is quite dry to ensure the adherence of the next coat.
- 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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