A wooden or plastic block with tips of nails just protruding through its base, used to scratch the surface of plaster lightly to enable more plaster to adhere to it.
Example sentencesExamples
- We key the surface using a devilling float, which is a wooden float with nails knocked in it, lightly scrape this across the surface and it will score the plaster, ensuring that the coat of finishing plaster adheres correctly.
- An old wooden float with board nails in one edge is a good tool for this job (this is called a "devilling" float in the trade.)