How to Build a Driveway Apron

The mats likely won't end perfectly at the sides, in which case you'll need to fill in with half cobbles or with custom-cut whole ones. To make a custom cut, detach any whole cobble that doesn't fit, and use a chalk stick to mark a cutline. Wearing safety glasses, place the cobble on a scrap board, set a mason's chisel on the chalk line, and tap it with a hand sledge to score it along that line. Then set the mason's chisel on the cutline with part of the blade hanging off and angle it toward the waste side, as shown. Strike the chisel with the sledge to break the cobble. Chip away any jagged edges with a brick hammer. Repeat with every cobble that doesn't fit.