Dec 31, 2015· Or get a concrete saw and cut some kerfs, chisel out with an air hammer, then grind it flat. Depending on how the door is used, if any water is put on the concrete on the inside, it would have trouble getting out when a speed bump is added.
Set up the tooling, depending on the hardness of the concrete and the type of material that needs to be removed from the surface. Connect the dust extraction hose and power lead. Position them so that they will stay out of the way while you're working. Turn on the extraction system and then start up .