What drilling method should be used for different masonry types?

For each type of stone, a drilling process is specified by the approval. This is of vital importance to achieve the pull-out load capacity. In most perforated bricks and in aerated concrete, the drill holes must be created in a rotary drilling process. With hammer drilling, the percussion would puncture each ledge and create a tapered broken-out area. This drastically reduces the frictional connection in the substrate and, therefore, also the load-bearing capacity. In general, if the stone type is unknown, we always recommend rotary drilling first. If the substrate cannot be drilled in a satisfactory way, you can switch to hammer drilling.