Can diamond drilling start with external wall insulation?

Suggestion: at the preset position to be drilled, drill the insulation hole with a utility knife and a small shovel, and then drill the hole from the wall cement mortar with professional diamond. The purpose of this is to prevent diamond from damaging the crack-resistant layer and insulating layer in a large area. Since the thermal insulation anti-crack layer is composed of alkali-resistant grid cloth or steel wire mesh, directly opening holes in the thermal insulation may cause the anti-crack layer and thermal insulation layer to fall off in a large area, so first use other tools to open holes in the thermal insulation, and then use a diamond to open holes in the wall (that is, on the thermal insulation base).

I hope I can solve your problem.