Every January the phone rings with the same concern. Thin gaps have appeared between the boards, they were not there in the summer, and the homeowner is worried something has gone wrong.
Almost always, nothing has. What they are seeing is wood doing what wood does, and Kansas City's climate makes it more visible here than in gentler parts of the country.
Wood Never Stops Moving
Hardwood is a natural material that exchanges moisture with the air around it. When the air is humid, boards take on moisture and expand slightly. When the air is dry, they give it up and contract.
Kansas City summers are humid and Kansas City winters are dry, and heating a house makes the indoor air drier still. So the boards in your floor are genuinely a fraction wider in August than they are in January. Multiply a very small amount of shrinkage across every board in a room and the difference shows up as thin gaps at the seams.
Come spring, humidity returns, the boards take moisture back on, and the gaps close. If the gaps in your floor appear in winter and disappear in summer, that is seasonal movement and the floor is fine.
What Tells You It Is Normal
Normal seasonal gapping is consistent. The gaps are thin, they appear across the whole floor rather than in one patch, they follow the seasons predictably, and they close again.
It is also more noticeable on wider planks than narrow ones, simply because a wider board has more width to shrink. Homeowners who chose wide plank sometimes feel they got a bad floor. They did not, they got more of the same movement concentrated into fewer seams.
What Tells You Something Is Wrong
Gaps that stay open through a humid Kansas City summer are not seasonal, and they are worth a look.
So are gaps concentrated in one area rather than spread across the room, particularly near an exterior door, a bathroom, or a kitchen appliance, because localized movement usually means localized moisture. Boards that are cupped, meaning the edges sit higher than the centers, point to moisture coming from below and that is worth investigating properly rather than waiting.
And gaps wide enough to catch a coin, or that have a board moving underfoot alongside them, are a different conversation. Our repair service deals with all of these.
What You Can Actually Do
The honest answer is manage indoor humidity rather than chase the floor. Keeping indoor humidity reasonably steady through the year reduces how far the boards travel in either direction. A humidifier through the dry months is the single most effective thing, and it is better for the rest of the house too.
What we would advise against is filling seasonal gaps. Filler pushed into a gap in January has nowhere to go when the boards expand in June, and the result is either filler squeezed up proudly above the surface or pressure between boards that can cause worse problems. Filling makes sense for permanent gaps, not seasonal ones.
When It Is Worth a Visit
If the gaps have not closed by late summer, if they are localized rather than general, or if any boards are cupped or moving, have someone look. Those are the cases where something is genuinely happening and where finding it early is much cheaper than finding it late.
If the gaps come and go with the seasons, your floor is behaving normally and the best thing you can do is leave it alone and run a humidifier. If you want certainty either way, a free estimate visit will tell you which one you have.
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Have a floor you want looked at? We give honest, no-pressure estimates across the Kansas City metro.
