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How to Level a Subfloor Using a Wood Floor Edger

The integrity of the subfloor is essential for a successful flooring installation, whether you are installing ceramic tile, laminate, carpeting or hardwood flooring. A subfloor should be level to within 3/16-inch in a 10-foot radius for best results. A floor edger is useful equipment for sanding down high spots on a plywood subfloor to achieve a level surface. Home improvement stores and equipment rental services rent floor edgers for home use.

Things You'll Need

  • Deck screws
  • Screwdriver
  • Vacuum
  • Straight edge
  • Pencil
  • Plastic sheeting
  • Floor edger
  • Coarse sanding discs
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Instructions

    • 1

      Remove loose nails or screws from the subfloor before beginning. Secure squeaking flooring to the floor joists using deck screws. Vacuum debris from the floor.

    • 2

      Check the level of the subfloor. Place a long straight-edge on the floor. Run the straight-edge across the floor checking for raised areas. Mark any high spots with a pencil.

    • 3

      Cover doorways, closets and heat vents with plastic sheeting for protection from dust particles.

    • 4

      Attach the sandpaper disc to the bottom of the edger. Be sure that the edger is not plugged in when you are attaching the sandpaper.

    • 5

      Plug in the edger. Turn it on and sand the high areas using a circular motion. Sand until the areas are level with the surrounding floor. Keep the edger moving as you sand. Change the sandpaper as needed.

    • 6

      Vacuum the dust from the floor when you are satisfied that the floor is level.