Step 4: Lay the base course

building a sandbox «»
Position the first course of timbers on top of the sand. Push a framing square into each corner and adjust the timbers until they are perfectly square. Hold each corner in this square position by bracing it with a scrap piece of 2x4 screwed down with 3-inch decking screws.

Using a sledge and a 4-foot level, gently tap each timber down into the sand until it is level.
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    Tools List

    • square shovel
      Spade and Shovel
    • circular saw
      Circular saw
    • speed square
      Speed square
    • framing square
      Framing square
    • four-foot level
      4-foot level
    • mallet
      Rubber mallet or sledge
    • hammer
      Hammer
    • drill
      Heavy duty drill/driver or impact driver fitted with 1/4-inch nut driver bit

    Shopping List

    1. 4x4 CEDAR TIMBERS
    to make up the sides of the sandbox

    2. SCRAP 2x4
    to hold the timbers square while you fasten them down

    3. 3-INCH DECKING SCREWS

    4. 6-INCH SELF-TAPPING TIMBER SCREWS

    5. LANDSCAPE FABRIC
    to line the box and keep weeds from growing up through the sand

    6. PLAY SAND
    aka natural sand

    7. TARP
    large enough to cover the completed sandbox

    8. VELCRO TAPE
    to hold the tarp down