Step 2: Install the top screw on the bracket

installing the top screw of the window box bracket
Photo: Mary Beth Montgomery
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Hold the first bracket with its top on the pencil mark.

Mark the bracket for the top screw hole so it falls near the bottom of the first course of siding below the window.

Using a countersink bit on a drill, bore a pilot hole and counterbore into the bracket on the mark.

Fasten the bracket to the house with a 3-inch-long galvanized decking screw through the pilot hole.

Tip: If mounting to vinyl, aluminum, or fiber cement, bore a pilot hole through the siding as well. The screw will bite into the sheathing behind it.
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    Tools List

    • drill
      Cordless drill with Phillips tip
    • four-foot level
      4-foot level
    • two-foot level
      2-foot level
    • 16-foot tape measure
      Tape measure
    • Countersink bit
      Combination countersink/counterbore bit

    Shopping List

    1. WINDOW BOX

    2. TWO WINDOW BOX BRACKETS

    window boxes longer than 48 inches need a third, center bracket



    3. 2 1/2-INCH DECKING SCREWS

    4. 3-INCH DECKING SCREWS

    5. CONTAINER SOIL

    6. PAINT OR STAIN

    7. FLOWERS AND PLANTS