How to Restore Old Fireplaces

Written by jennifer wiginton
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How to Restore Old Fireplaces
(fireplace image by askthegeek from Fotolia.com)

Fireplaces provide light, warmth and focal points to rooms. However, over time inappropriate mantles, broken hearth stones and stained surrounding tiles can detract from their appeal. Homeowners willing to take the time and effort can restore their old fireplaces and once again enjoy the benefits of these popular home features.

Skill level:
Moderate

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Things you need

  • Cardboard
  • Stone slabs
  • Tiles
  • Pry bars
  • Personal protective equipment: goggles, ear protection, dust masks
  • Demolition hammer with chisel bit
  • Mason's brush
  • Vacuum
  • 2-by-4 lumber piece, 1 foot longer than the hearth
  • Circular saw
  • Water
  • 2 buckets
  • Concrete topping mix
  • Flat finishing trowel---for smoothing topping mix on hearth base
  • Thinset mortar
  • 1/2-inch notched trowel
  • Suction cups---for moving heavy slabs of stone
  • Rubber mallet
  • Brick trowel
  • Straightedge
  • Wood filler strips, optional
  • Wood glue, optional
  • Nails, optional
  • Jigsaw, optional
  • 2-inch finishing nails

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Instructions

  1. 1

    Make cardboard templates the exact sizes of the replacement hearth slabs and surround tiles. Use the slab templates when obtaining materials from your supplier. Use the tile templates to help lay out the desired design and determine the number of tiles needed.

  2. 2

    If reusing the original mantle, outline its placement on the wall. Gently pry it away from the wall with pry bars. Measure the location of wooden elements---such as framing pieces---to ensure they are at least 2 inches from the firebox, or the distance required by local fire codes.

  3. 3

    Protect the nearby floor with cardboard. Wear protective equipment, and use a demolition hammer to remove the original hearth stones. Apply only enough force with the hammer to chip away the stone slabs---pressing too hard will damage the supporting concrete base and firebox floor. Clean the hearth space with a brush and vacuum.

  4. 4

    Make a screed---or piece to smooth concrete---from the 2-by-4 lumber piece. On each end, draw notches equal to the depth of the hearth stone slabs plus 3/8 inch for the thinset. Cut out the notches with the circular saw. Wet the hearth space. Mix the concrete topping with water in a bucket. Pour it into the hearth space. Lay the screed notch-side down over the concrete. It should fit easily into the hearth space, overhang the space approximately 6 inches on each side, and move back and forth freely across the entire area. Drag the screed across the hearth to smooth the concrete topping. Add more topping if necessary. Continue to smooth it with the screed until it is flat. Use a flat trowel to ensure all the corners are smooth. Let the topping dry overnight.

  5. 5

    Mix the thinset mortar with water in a second bucket and pour it into the hearth space until 3/8-inch thick. Use the notched trowel to make even ridges in the mortar across the entire space. Using suction cups to help lift and handle the hearth stones, lay the stones into place on the thinset. Make sure the stones do not rock. Use additional thinset if the stones move or are too low in the hearth. Tap on the stones with the rubber mallet if they are too high. If necessary, add thinset between the hearth and firebox. With the brick trowel, remove any excess thinset and smooth the finished hearth.

  6. 6

    Spread thinset on the back of the tiles with the notched trowel. Place tiles on the sides of the fireplace, pressing firmly against the bricks. Use a straightedge to ensure the tiles are even. If not, gently rotate them into place. Check that the inside pieces overlap the firebox slightly and that the top pieces are flush with the top of the fireplace. Let the mortar set overnight.

  7. 7

    Place the mantle on the hearth, aligned with its earlier outline to judge its fit. If necessary, cut filler strips to ensure it fits snugly into place. Remove the mantle and glue and nail strips to the back of the mantle, cutting off excess lengths with the jigsaw. Center the mantle on the fireplace surround. Holding it tightly against the surround and wall, nail it into place by driving the finishing nails at an angle through the mantle and into the wall.

Tips and warnings

  • Quick pick-me-ups for fireplaces include removing old paint from tiles, bricks or mantles, or painting them to match the room's decor
  • To hide unsightly bricks in the firestove---or the actual site of the fire itself, add an enclosed firestove to the fireplace. These come in a variety of styles and sizes, so you can choose the perfect one for your home decor
  • Some homeowners may desire to install a gas fireplace instead of restoring their wood fireplace. This will require hiring a plumber to connect flexible copper tubing between the fireplace and a natural gas or propane supply.
  • Have the fireplace checked out every year in the fall by a professional chimneysweep to ensure that it can be used safely. Check for safety issues such as broken bricks, leaning chimney or cracked sheathing and double-check that the fireplace meets local building and fire codes.
  • Always use protective equipment and caution when working with tools. Keep a first aid kit handy.
  • Avoid breathing dust from the mortar mixes while preparing them, since this may cause respiratory irritation.

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