Step 3: Prep and Paint

Prep and Paint when Building a Window Cornice
Illustration: Gregory Nemec
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Fill nail holes with wood filler, let it dry, and sand it smooth. Apply two coats of paint in the same sheen as your existing casing.
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    Tools List

    • 30-foot tape measure
      Tape measure
    • miter saw
      Miter saw
    • drywall corner clincher tool
      Corner clamps
    • pneumatic brad nailer
      Pneumatic brad nailer
    • air compressor
      air compressor
    • circular saw
      Circular saw
    • sandpaper
      220-grit sandpaper
    • 2-and-a-half-inch paintbrush
      Paintbrush
    • two-foot level
      2-foot level
    • drill
      Drill/driver

    Shopping List

    Poplar 1x8 for the sides and front Get a 5-foot length.

    Poplar 1x4 for the French cleat Get a 4-footer.

    Poplar 1x10 for the top Get a 4-footer.

    3-inch solid primed-pine crown molding

    ¾-inch primed-pine ogee molding

    Primed-pine cap molding for the bottom of the cornice1 ½-inch brad nails

    ¾-inch brad nails

    2 ½-inch wood screws

    Wood glue

    Wood filler

    Paint