Step 3: Cut and Add the Trim

diagram of trim to cut and add to build a wood surround fireplace shelf mantel
Illustration: Gregory Nemec
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Nail centered pilasters to each leg. Install a nailing block on each pilaster flush with its top edge. Miter and nail trim to the mantel according to the diagram below. Start with baseboard at the bottom, add crown molding at the top, then add astragal molding below the crown molding and along the bottom of the breast. Miter and nail the doorstop to the mantel's interior edges to finish the return to the surround.
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    Tools List

    • circular saw
      Circular saw
    • miter saw
      Miter saw
    • drill
      Drill/driver
    • brad nailer
      Brad nailer

    Shopping List

    1. 1x1

    2. ¾-inch veneer plywood

    3. 1x5

    4. ½x¾-inch shoe molding

    5. Crown molding

    6. Astragal molding7. Doorstop molding

    8. Integrated baseboard

    9. Wood glue

    10. 1 -inch trim-head screws

    11. 1 ½-inch finishing nails