Step 14: Install the interior form

Install the interior form to make a concrete planter as a this old house weekend remodel project
Photo: Kolin Smith
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Set the interior form inside the plywood form. Fill the form with sand, as shown, to prevent its walls from collapsing or bowing from the pressure of the surrounding mix. Be sure to center the interior form to get an even wall thickness on all sides.
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    Tools List

    • circular saw with dust-collection
      circular saw
    • Rafter Square
      rafter square
    • straight edge
      straightedge
    • miter saw
      miter saw
    • pneumatic brad nailer
      pneumatic nailer
    • drill
      drill/driver
    • caulk gun
      caulk gun
    • bar clamps
      clamps
    • mixing tub
      large plastic container
    • flat blade shovel
      shovel
    • mason's trowel
      masonry trowel
    • mason's chisel and maul
      hammer and chisel

    Shopping List

    ¾-inch plywood Get one 4-by-8-foot sheet.

    ¼-inch fiberboard Get one 4-by-4-foot sheet.

    ¾-inch cove molding

    Get two 8-footers.

    1-inch-diameter dowel

    18-gauge 1¼-inch pneumatic nails

    2-inch drywall screws

    1¼-inch drywall screws

    wood glue

    latex caulk

    duct tape

    vegetable oil

    sand

    Quikrete Countertop Mix