Gaps in floorboards are common in older homes and newer properties, often caused by seasonal changes, shrinking wood, or wear and tear over time. While these gaps can add character to rustic floors, they can also let in drafts, collect dust, and disrupt the aesthetic appeal of your flooring. Fortunately, filling these gaps is a straightforward task that can restore comfort and charm to your space. Here’s a comprehensive guide on how to fill gaps in floorboards.

Why Do Floorboard Gaps Occur?

Wood is a natural material that reacts to changes in humidity and temperature. During dry conditions, floorboards may contract, creating gaps. Conversely, in damp weather, they expand. Over time, this constant shifting can lead to permanent gaps. Understanding the root cause is essential to choosing the right solution for filling them.

Step 1: Assess the Gaps

Before starting, inspect your floor to evaluate the size and number of gaps. Small gaps can often be filled quickly with a wood filler or flexible caulk, while wider gaps may require wood strips or slivers for a more robust solution.

Step 2: Prepare the Area

Cleaning is a crucial first step. Use a vacuum cleaner or a narrow brush to remove dirt, dust, and debris from the gaps. This ensures a smooth application of the filler and enhances its adhesion.

Step 3: Choose the Right Filling Material

Several materials are available for filling gaps in floorboards, each suited to specific needs:

  1. Wood Filler: Ideal for narrow gaps and easy to apply. Choose a filler that matches the color of your floor for a seamless finish.
  2. Wood Strips or Slivers: Perfect for wider gaps. These can be cut to size and installed with glue for a durable fix.
  3. Flexible Caulk: Suitable for gaps that expand and contract with seasonal changes.
  4. Jute Rope or String: A traditional option for older homes with large gaps, often used to retain the period charm of the flooring.

Step 4: Apply the Filling Material

For Wood Filler

  • Use a putty knife to press the filler into the gaps.
  • Smooth the surface, ensuring the filler is level with the floorboards.
  • Let it dry completely before sanding the area for a polished look.

For Wood Strips or Slivers

  • Measure and cut strips to match the gap size.
  • Apply wood glue to the edges of the strips.
  • Push the strips firmly into the gaps, trimming any excess.
  • Sand the area smooth once the glue dries.

For Flexible Caulk

  • Load the caulk into a caulking gun.
  • Squeeze the caulk into the gaps evenly.
  • Smooth the surface with a damp finger or cloth for a neat finish.

For Jute Rope

  • Cut the rope to fit the length of the gaps.
  • Push the rope into the gaps, securing it with glue if necessary.
  • Trim any excess material for a clean appearance.

Step 5: Sand and Refinish

Once the gaps are filled and the material has dried, sand the entire floor to ensure a smooth surface. Finish with a coat of varnish, stain, or sealant to protect the floor and enhance its overall look.

Final Tips

  • If you live in a climate with significant humidity changes, consider using flexible materials that adapt to seasonal shifts.
  • For larger gaps or widespread issues, consult a flooring professional for advice or repair services.

Filling gaps in floorboards is an excellent way to improve the insulation, cleanliness, and aesthetics of your home. With the right tools and techniques, you can tackle this project and enjoy a restored, comfortable living space.