How to Repair Cracks in Pine Flooring

Cracks in pine flooring can be repaired in different ways depending on the severity of the crack. Although wood filling is the usual repair for more than minimal damage on wood, it may not be necessary when the damage is small and probably due to an expansion of the wooden planks.

Tools and Materials Needed

  • Wax sticks
  • Wood filler
  • Putty knife
  • Mineral spirits
  • New planks
  • Wood stain
  • Polyurethane sealer
  • Sander

Step 1 – Assess the Damage on the Floor

Check the crack or cracks on the floor and see if they require a minor or major repair. Very small cracks are probably due to expansion caused by moisture. If this is the case, do not attempt to fill it with wood filler because once the wood shrinks, it may cause the crack to get worse. However, if the crack is caused by a rotten piece of wood or a split wooden piece that has to be removed, then wood filler is a good option. If the pine flooring has a lot of small cracks or scratches, refinishing the entire floor may be the best solution.

Step 2 – Using Wax Sticks

Locate the damaged wood and see if it is small enough for the wax to fill in. Clean the surface around the crack with a piece of cloth. Dampen another piece of cloth with mineral spirits and wipe off the surrounding area to clean and prep it. Wipe off the chemical immediately with a new dry cloth.

Rub the stick back and forth on top of the cracked piece of plank until the filler gets into the grooves completely. Rub the waxed floor with a dry cloth.

Step 3 – Using Wood Filler

Remove any splinters inside the cracks first. If some of the wood is rotten, gouge it with a putty knife. Prepare the wood filler according to the manufacturer’s instructions. Apply the filler into the space in between the wood using a putty knife. Use the putty knife as well to level it with the floor. Allow it to dry. Sand the repaired piece of pine plank. Apply stain and sealer afterwards.

Step 4 – Refinishing the Floor

After long periods of use, the pine flooring may have acquired several cracks due to constant traffic. If so, sand the entire surface starting with a rough grit sandpaper to remove the cracked top layer. Sand the entire floor with medium grit sandpaper. Finally, use fine grit sandpaper to smoothen the rough surfaces.

Clean the dust from the floor using a vacuum cleaner. Apply wood stain onto the floor using a rag. Follow the direction of the grain during application. Allow the stain to dry. When the stain is dry, prepare the polyurethane sealer.

Apply the sealer thickly onto the floor so that it fills every minor crack left after sanding. Use a paint roller for easier application. The sealer should be left to cure for about 48 to 72 hours before walking on top of the floor surface again.