Use a pole to establish the center of the fireplace. This will be a reference point so make sure to use a long pole. Use a string and some spray paint to mark the edge of the fireplace.
Then you can start digging… To find the right height you can add sand and some cobbles. Make sure the height is approved by appropriate authorities (wife, girlfriend, whatever) and then make sure this stays where it is as this will be another reference point for you.
Categories Woodworking Plans