How to Level a Concrete Floor

Written by ehow home & garden editor
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If your home is built on a slab or you want to renovate your basement or garage, you'll have to deal with a concrete floor. Many flooring materials can be installed over concrete, including carpet, wood and tile. For best results, you'll need to level the concrete floor before installing to avoid dips, humps and cracked tiles.

Skill level:

Things you need

  • Vacuum
  • Framing square or flat piece of lumber
  • Marker
  • Concrete grinder
  • Tarp or sheets
  • Floor leveling compound
  • Trowel or drywall taping knife

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  1. 1

    Sweep and vacuum the concrete floor. Scrape the floor with a scraper or buff it with heavy grit paper. Vacuum again so that all dust is removed.

  2. 2

    Get a framing square or a straight, flat piece of lumber. Move it over the whole floor to check for spots that are not level. Mark the high and low spots with chalk or markers.

  3. 3

    Rent a concrete grinder from a floor specialty shop or rental center. For large bumps, use a high-end grinder or contract the work to a floor removal specialist. Both options cost more, but will take less time to do the job.

  4. 4

    Open all exterior doors and windows. Cover the door frames and any cabinets, furniture or other items in or near the concrete floor with tarps or sheets.

  5. 5

    Grind down high areas with a concrete grinder. Go over the spot until it's level. Sweep and vacuum the floor.

  6. 6

    Prepare a quick curing floor leveling compound according to the manufacturer's directions. Work with small amounts, since the compound hardens quickly.

  7. 7

    Pour the compound in small sections in front of the framing square or piece of flat lumber. Pull the lumber over the compound. Wait 20 to 30 minutes, then go over it with a trowel or drywall taping knife.

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