Step 9: Interlace the Mats

interlacing the cobblestone mats in the driveway apron
Photo: Kolin Smith
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Use side-cutting pliers to remove the half cobbles from the nylon grid on the open side of the first mat. Then remove the half cobbles on both side edges of the next mat. Lay the second mat so that it interlocks with the first. Continue this process until you reach the other side of the driveway. Snip off any cobbles that don't fit against the side.
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    Tools List

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    • 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

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    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.