With a hammer you will tap individual slabs.

To start work, you need to purchase the tools of work, namely: all — forever — a rubber hammer, a spatula, to apply glue on the stoves and a separate vessel for the solution. With a hammer you will tap individual slabs. The most suitable surface will, of course, be processed by plaster, but even if the surface is not perfectly even, the main thing is that there are no sharp differences.