Now, you need to set the blade depth at 2 inches and start by cutting at the edge of the concrete. Slowly follow the chalk line that you have laid down and do not forget to keep the blade wet by regularly pouring water on it. Regular pouring of water will not only keep the blade cooler but also reduce dust. If you want to cut concrete deeper than 4 inches, it is recommended to get your hands on a cut-off saw. This type of tool is recommended for use in driveways, retainer walls, basement as well as housing slabs.