How long does it take to dry lay the slate?

The basic process is to mix cement and sand, add a little water or not, then lay them flat under the tiles, then lay a layer of cement slurry (or add a little sand) on the bottom of the tiles, lay the tiles flat on them, and tap them gently around with a mallet. It will take about two days for the weather to dry now.

If it is wet paving, the basic process is to replace sand and cement with cement mortar, not too thin, then smooth it on the ground, and then tile it, and it will dry in about 10 day.