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How to Lay Granite on Concrete

Applying a new floor of granite tile to a concrete sub-floor involves the same technique and tools as applying other types of tile. However, due to the fact that granite involves natural stone rather than fabricated ceramic, the finished job creates a slightly uneven surface. Further, granite tiles tend to be particularly fragile, so putting them in place requires a bit of care and patience. That said, if you take your time, the finished floors can produce beautiful interiors or exterior walking areas.

Things You'll Need

  • Broom
  • Vacuum cleaner
  • Level
  • Tile Pencil
  • Leveling compound putty
  • Spreader
  • Pre-cut granite tile
  • Mastic mortar
  • Spade
  • Trowel
  • Tile saw
  • Screwdriver
  • Grout
  • Grout trowel
  • Sponge
  • Bucket
  • Water
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Instructions

    • 1

      Clear the cement floor of any furniture, equipment or materials. Sweep the floor thoroughly to remove any dust. Run a vacuum cleaner over the floor to suck up any fine grit, dust, or dirt left after sweeping.

    • 2

      Place a level on the floor to determine if it is straight or uneven. Mark the areas where the cement is uneven with a tile pencil.

    • 3

      Use a spreader to apply leveling compound in the uneven location. Spread the compound smooth over the area and let it dry for two hours.

    • 4

      Mark the floor with the level and the tile pencil, making straight lines across the floor to follow when installing the granite tile. Draw the lines for each row of tile that will be applied in the area. Dry practice how many tiles will be needed for the area by placing them on the cement temporarily. Keep doing this until the space is covered. Count up the number of granite tiles the practice run takes.

    • 5

      Remove the tiles by stacking them once your count is completed. Bring in a bucket of mastic mortar. Scoop out a glop with a spade and flick it to the floor area where you will start. Spread out the mortar with a trowel so that the mortar is evenly beaded by the trowel teeth and is no more than ¼ inch thick. Put the tools aside.

    • 6

      Place the tile on the area covered with just-applied mortar. Press the tile into place. Use a rubber mallet to gently tap the granite tile down. Do not hit the tile hard. Tap the entire tile until it is firmly set. Apply tile spacers around the corners. Repeat steps 5 and 6 until the room cement floor is completely covered with the granite tile. Cut smaller pieces of tile as necessary with a tile saw to fit custom areas.

    • 7

      Let the tile dry once the floor is covered. Go back and pop out the tile spaces with a screwdriver the next day. Open a container of pre-mixed grout in the color you desire. Use a grout trowel to spread the grout into the cracks between the granite tiles at a 45-degree angle. Wipe the residue off with a wet sponge. Rinse the sponge off in a bucket of water. Repeat the process until all the tile area is grouted. Do not let the grout dry on the tile surface.

    • 8

      Let the grout dry for a day. Inspect the now-tiled room and use as desired.

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Floor Repairs
  1. How to Lay Tackless Strips on Concrete
  2. How to Lay Peel-and-Stick Blocks
  3. How to Place a Wood Floor Over Tile
  4. How to Lay Tile on Exterior Concrete Steps
  5. How to Lay a Carpet on a Concrete Basement Floor
  6. How to Lay Carpet on a Concrete Floor
  7. How to Lay a Threshold on Concrete
  8. How to Lay Brick Over Existing Tile
  9. How to Lay a Concrete Floor Over a Gravel Basement
  10. How to Lay a Domestic Concrete Floor
  11. How to Cut a Vent in a Tile Floor Over Concrete
  12. How to Lay Porcelain Tile Over a Concrete Floor

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