How to apply trim to the floor around a brick fireplace

Written by paul massey
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After the installation of new carpet or wood flooring, a baseboard trim is a finishing touch to conceal the perimeter edges. Where a brick fireplace extends into the room, the trim lacks the common wood wall framing for attachment. The procedure to install the baseboard around a brick fireplace will have the trim secured and the floor detailing consistent.

Skill level:
Moderately Easy

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Things you need

  • Tape measure
  • Mitre saw
  • Caulking gun
  • Latex construction adhesive
  • Duct tape or masking tape (optional)
  • Standard bricks (optional)

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Instructions

  1. 1

    Measure the length of either side of the fireplace hearth for the first piece of base trim. Measure at the floor surface, from the outer face of the existing wall trim to the front corner of the hearth. You can begin the installation on either side and proceed around the hearth base to the opposite side.

  2. 2

    Mark the dimension measured in Step 1 on a piece of base trim, from a square cut end. The marked point will be the short point of the corner angle, which is typically a 45 degree angle.

  3. 3

    Cut the corner mitre angle at the mark using a mitre saw.

  4. 4

    Apply a continuous 1/2-inch bead of construction adhesive to the backside of the trim piece cut in Step 3. Keep the adhesive to the lower half of the trim piece to prevent the adhesive from squeezing out at the top edge when you install it.

  5. 5

    Position the trim piece against the fireplace base and press it firmly into place to spread the construction adhesive. You can apply short strips of duct tape or masking tape to hold the piece against the brick surface.

  6. 6

    Cut a corner mitre angle on one end of a piece of wood trim to fit at the leading corner of the trim piece installed in Step 5. Measure the width of the front face of the fireplace and mark this dimension on the piece of trim, measured from the short point of the corner angle.

  7. 7

    Repeat Steps 1 through 4, as necessary, to complete the base trim installation on the remaining sides of the fireplace.

Tips and warnings

  • Rest standard bricks or any other weighted object against the installed trim pieces to hold them firmly in place during the curing of the adhesive bond, typically about 24 hours.

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