Filling Floor Gaps
Preparing Hardwood Before Refinishing
After sanding, buffing, and any optional water popping, the next step in many hardwood floor refinishing projects is evaluating gaps between the boards. Some gaps are a natural part of wood flooring and should be left alone, while others can be filled to improve the appearance and create a smoother finished surface.
Knowing which gaps to fill—and which to leave—is an important part of professional hardwood floor refinishing.
Why Gaps Develop
Hardwood naturally expands and contracts as humidity changes throughout the year. Over time, seasonal movement, normal wear, and the age of the flooring can create visible spaces between boards.
Not every gap indicates a problem or requires repair before refinishing.
When Gaps Should Be Filled
Small, stable gaps that remain consistent throughout the year are often good candidates for filler before stain and finish are applied. Filling these areas can improve the overall appearance of the floor while creating a more uniform surface.
The decision depends on the condition of the hardwood and how the floor is expected to move.
When Gaps Should Be Left Alone
Large seasonal gaps that regularly open and close should generally remain unfilled. Filling joints that experience significant movement may cause the filler to crack, loosen, or separate as the wood expands and contracts.
Proper evaluation helps avoid unnecessary repairs later.
The Gap Filling Process
Professional gap filling follows the surface preparation stage.
Typical steps include:
Inspecting the floor for stable gaps
Selecting the appropriate filler
Filling suitable areas evenly
Allowing the filler to cure properly
Sanding smooth before finishing
Each step helps prepare the hardwood for stain and finish.
Proper Repairs Create Better Results
Gap filling is just one part of preparing hardwood for refinishing. When combined with careful sanding, surface preparation, and professional finishing techniques, appropriate filler helps create a cleaner, more uniform appearance while allowing the hardwood to perform naturally for years to come.
Good preparation produces lasting results.
Why Homeowners Choose Recoatings
Recoatings combines decades of hardwood flooring experience with professional sanding, thoughtful color development, premium finish systems, and honest recommendations. We evaluate every hardwood floor individually, recommending gap filling only where it improves the finished appearance without compromising the natural movement of the wood.
Continue Exploring
Learn more about our company and our work:
These pages explain our hardwood floor refinishing process, showcase completed hardwood floor projects, and introduce the experience and craftsmanship behind Recoatings.