How to Attach Crown Molding to a Premade Bookcase

Written by jonah morrissey
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How to Attach Crown Molding to a Premade Bookcase
Attaching crown moulding to the top of the bookcase will create an elegant look. (Hemera Technologies/PhotoObjects.net/Getty Images)

You can add decorative detail to a pre-made bookcase by attaching crown moulding to it. Crown moulding that is attached to the top of the bookcase will transform it into a more formal piece of furniture. Match the crown moulding to the moulding in the room to make it a cohesive furniture piece within the room. The moulding can be installed under the top lip of the bookcase top on the front and sides. Finish the moulding in a finish that matches the rest of the bookcase.

Skill level:
Moderate

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Things you need

  • Tape measure
  • Pencil
  • Crown moulding
  • Mitre saw
  • Box, finish nails
  • Hammer
  • Nail set
  • Wood putty
  • Putty knife
  • Sandpaper, fine-grit
  • Wood finish
  • Paintbrush

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Instructions

  1. 1

    Measure the width of the bookcase along the top of the front with a tape measure. This is the length you will need for the front moulding. Measure the depth of the bookcase along the top of one side. This is the length required for the side moulding pieces.

  2. 2

    Adjust the mitre saw to make a 45-degree angle cut. Measure and mark the measurement required for the front moulding piece on the back side of the moulding stock.

  3. 3

    Place the crown moulding on the mitre saw with the front side facing up. The top edge should rest against the fence and the bottom edge should rest against the table of the saw. Cut a 45-degree angle on each end. The front will be the long side with the angles shortening into the back edge. The measurement from the back side will be the measurement required for the front moulding piece.

  4. 4

    Measure and mark the length required for the two side moulding pieces onto the back side of the moulding stock. Cut one 45 degree angle on each end of the side moulding pieces using a mitre saw so that they fit with the front moulding piece to form a three-sided rectangle. The measurement from the back side will be the measurement for the side moulding pieces.

  5. 5

    Fit the side and front pieces together under the top lip of the bookcase top.

  6. 6

    Hammer finish nails through the moulding every 3 inches into the book case to fasten it together.

  7. 7

    Center the nail set onto the head of each nail and strike the top of it with a hammer to set the nails 1/16 inch deep into the surface of the wood.

  8. 8

    Fill the nail holes with a putty knife using wood putty. Allow the putty to dry for 24 hours.

  9. 9

    Sand the putty with fine-grit sandpaper in the direction of the wood grain.

  10. 10

    Apply a matching wood finish to the moulding with a paintbrush. Allow the finish to dry 24 hours before using the bookcase.

Tips and warnings

  • Add a decorative moulding to the base of the bookcase such as baseboard or cove moulding.
  • Wear eye protection when woodworking.

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