Step 5: Check the Depth

checking the depth of an area of removed driveway
Photo: Kolin Smith
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The bed needs to be ½ inch deeper than the height of your cobbles (ours were 1 inches tall, so we needed a 2-inch-deep bed). Drive stakes into each corner and at the midpoints along its width. Tie mason's lines between the pairs of stakes so that they run parallel to the centerline of the driveway. The lines should be taut, with one end flush with the surface of the driveway and the other end flush with the street. Measure down from the lines at multiple points to determine how much you need to excavate or add to the bed. If you need to build it up, use aggregate to do so, then compact it.
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    Tools List

    • 30-foot tape measure
      tape measure
    • finish nails, various lengths
      nails to stake the chalk line in asphalt
    • chalk line
      chalk line
    • safety glasses
      safety glasses
    • ear muffs
      hearing protection
    • concrete saw
      14-inch gas-powered concrete saw with segmented diamond blade
    • garden hose
      garden hose
    • hammer drill
      hammer drill with chisel bit to break up the driveway surface
    • cutter mattock
      pick mattock to remove broken-up chunks
    • gloves
      work gloves for handling asphalt and cobbles
    • garden stakes
      stakes
    • mason's line
      mason's line
    • iron rake
      bow rake
    • plate compactor
      plate compactor to tamp base and pavers
    • side-cutting pliers
      side-cutting pliers
    • chalk
      chalk stick
    • mason's chisel with hand guard
      mason's chisel with hand guard
    • sledge hammer
      hand sledge
    • brick hammer
      brick hammer
    • tamper
      hand tamper to fix uneven spots during installation
    • duct tape
      duct tape
    • concrete mixer
      cement mixer
    • Squeegee
      double-foam squeegee to spread grout into joints
    • push broom
      push broom to remove excess grout

    Shopping List

    Cobblestone mats with cast-in grid
    Have your supplier help determine the amount you need.

    Permeable epoxy grout

    Leveling sand.
    A ½-cubic-foot bag covers 6 square feet at 1 inch deep.