Wood Floor Gap Filling: What Can Be Done About Gaps in Wooden Floors?
Gaps between wooden floorboards are common, particularly in older properties. Some are part of the natural character of the floor, while others may benefit from professional repair and gap filling.
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Why Do Gaps Appear Between Wooden Floorboards?
If you live in an older home, gaps between wooden floorboards may be something you see every day. In some properties they are narrow and barely noticeable. In others, the gaps can be wide enough to become a much more obvious feature of the floor.
Timber is a natural material. It responds to the conditions around it and can expand or contract as moisture levels and indoor conditions change. Older floorboards may also have been in place for decades, so movement over time can contribute to visible spaces between individual boards.
That does not automatically mean there is something seriously wrong with your floor. The important question is whether the gaps are simply part of the character of an older timber floor or whether repair work would improve its appearance and condition.
Professional wood floor gap filling can form part of a wider floor repair or restoration project, but the right method depends on the floor itself.
Not Every Gap Should Automatically Be Filled
One of the most important things to understand about gap filling is that there isn't a single solution that should be used on every wooden floor.
Timber naturally moves. A gap that is visible at one time of year may become smaller when conditions change. Filling a moving gap without first understanding the floor can therefore be the wrong approach.
We prefer to assess the floor as a whole. That includes looking at the size and consistency of the gaps, the type and condition of the boards and whether there are any other repair issues that need attention.
The aim is not simply to make every visible line disappear. It is to choose an appropriate repair that works with the existing timber.
What Causes Gaps in Wooden Floors?
There can be several reasons for spaces appearing between wooden boards. Understanding the likely cause is an important part of deciding what should happen next.
- Natural timber movement. Wood can expand and contract as conditions within a home change.
- The age of the floor. Older boards may have moved gradually during many years of use.
- Changes in indoor conditions. Heating and seasonal changes can affect moisture levels within timber.
- Previous installation. The way a floor was originally fitted can influence how gaps develop later.
- Loose or damaged boards. In some cases the visible gap is only one part of a wider repair issue.
How Can Gaps in Wooden Floors Be Filled?
The best approach depends on the width of the gaps, the type of flooring and the condition of the surrounding boards. Different floors can require different methods.
Filling Smaller Gaps
Smaller, stable gaps may sometimes be dealt with as part of the sanding and restoration process. The objective is to create a neater and more consistent surface without taking away the natural appearance of the timber.
Dealing With Larger Gaps
Wider gaps can require a different approach. Simply pushing ordinary filler into a large space is not necessarily a suitable repair.
Depending on the construction of the floor and the condition of the boards, timber-based repairs may be considered where appropriate. The repair needs to take account of the existing floor rather than treating the gap in isolation.
Repairing Loose or Damaged Boards
Sometimes a gap is associated with a board that has moved, become damaged or needs additional repair. In that situation, dealing only with the visible gap would not address the underlying issue.
Looking at the whole floor allows us to consider the gaps alongside damaged boards and any other areas that may need attention.
Assess the Floor Before Choosing the Repair
Inspect
Look at the gaps, boards and overall condition of the existing floor.
Identify
Consider whether the gaps are stable or connected to movement or other repair issues.
Repair
Use an appropriate gap-filling or timber repair method for the particular floor.
Restore
Where required, sanding and refinishing can bring the repaired floor together visually.
What About Gaps in Original Floorboards?
Gaps are particularly common in original floorboards. If the boards have been in a house for many years, some movement and variation should not be surprising.
In fact, part of the appeal of an original timber floor is that it doesn't look exactly like a newly manufactured product.
The goal of restoration should therefore not always be to remove every sign of age. We want to retain the character of the timber while dealing with gaps or damaged areas where repair will genuinely improve the floor.
If you have recently lifted carpet and discovered original floorboards underneath, it is worth having them assessed before deciding to cover them again.
Should Gap Filling Be Done Before Floor Sanding?
When gap filling forms part of a wider floor restoration, the different stages need to be planned together.
There is little benefit in concentrating on individual gaps without considering how the entire floor will ultimately look. Repairs, sanding and the final finish all contribute to the finished result.
Professional sanding can remove years of surface wear and old finish from the boards. Once the necessary repairs have been dealt with and the surface has been properly prepared, the floor can then be finished to protect the exposed timber.
This approach can make repairs feel like part of the complete floor rather than isolated patches of work.
Why Not Just Fill the Gaps Yourself?
Gap filling can look straightforward, but timber movement is what makes it more complicated than filling a crack in a wall.
A material that looks fine when first applied may not behave in the same way as the surrounding timber as conditions change. This is particularly important where the gaps are larger or where there is movement in the boards.
There is also the appearance of the finished floor to consider. A repair that is too obvious can draw more attention to the gaps rather than making them less noticeable.
Having the floor assessed first means the repair method can be chosen around the actual timber, the size of the gaps and the wider condition of the floor.
Repair the Floor, Not Just the Gap
This is probably the most useful way to think about wood floor gap filling. The spaces between the boards are only one part of the floor.
If there are loose boards, damaged timber, scratches, worn finishes or other problems, it may make more sense to deal with them together as part of a proper wood floor repair or restoration.
The aim is to leave you with a floor that works as a whole, rather than simply treating individual gaps without considering the surrounding timber.
Worried About Gaps in Your Wooden Floor?
If gaps, loose boards or damaged areas are spoiling the appearance of your wooden floor, RH Wood Floors can assess the floor and explain the repair options available.
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