Step 6: Scribe-Fit the Filler Strips.

For each run, have a helper hold the strip level and touching the ceiling's lowest point. Set a compass to the widest gap and scribe the ceiling contour on the strip, as shown. Trim the strip with a jigsaw, check the fit, and miter-cut the ends to length. Take the frame down and glue and nail the strips to the top edge of the crown. Reinstall the assembly and caulk it along the ceiling.
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    Tools List

    • 30-foot tape measure
      Tape measure
    • hand clamps
    • miter saw
      Miter saw
    • drill
    • pencil compass
      Compass (optional)
    • jigsaw
      Jigsaw (optional)
    • pneumatic pin gun
      Pneumatic pin nailer (optional)

    Shopping List

    1x4 poplar boards
    Crown molding
    Filler strips (optional)
    1¾-inch drywall screws for building the frame
    1¼ and 2½-inch washer-head screws for attaching the crown
    Pin nails
    Wood glue
    Caulk (optional)