How to Fix Gaps in Laminate Flooring in WNC Homes

Gaps in laminate flooring are one of the most common complaints from WNC homeowners, particularly after winter. When indoor heat runs constantly through the heating season and outdoor temperatures drop, the relative humidity inside a home can fall well below 30 percent. At that point, the HDF core in laminate planks loses moisture and contracts. As planks shrink slightly in width, gaps appear between them.

Gaps in laminate flooring from this cause are often called seasonal gaps. They’re most visible in January through March in Asheville and Hendersonville, and they often partially or fully close by late spring as humidity rises. If the gaps follow this seasonal pattern reliably, the floor is behaving within normal parameters, though the amplitude of the movement can be reduced with better humidity management.

Types of Gaps in Laminate Flooring

Seasonal Gaps

Seasonal gaps in flooring appear in winter and close in spring. They’re generally narrow, consistent across the floor, and not associated with any squeaking or movement. Planks don’t shift position; they just contract slightly. These gaps rarely exceed a millimeter or two in typical WNC conditions and don’t require repair as long as they’re cycling normally.

Installation Gaps

Installation-related gaps in laminate flooring happen when the floor isn’t installed with enough perimeter expansion space. Laminate needs roughly a quarter to three-eighths of an inch of expansion gap at every wall and fixed object. If the floor is cut too tightly, seasonal expansion can force planks away from each other as the floor has no room to move toward the walls. This type of gapping is less predictable and often unevenly distributed.

Shifting and Permanent Gaps

Gaps in laminate flooring that grow over time, don’t close in warm months, or appear suddenly after a period of stability usually signal a structural issue. Subfloor movement, a moisture event, or a failing click-lock joint can all cause planks to shift position permanently. This type of gapping is beyond seasonal management and typically requires professional evaluation. 

WNC-Specific Factors That Worsen Gaps in Laminate Flooring

Western NC’s climate creates conditions that make gaps in laminate flooring more pronounced than in many other regions. Mountain homes at higher elevations experience more extreme temperature differentials. Homes in creek valleys and hollows around Asheville and Fletcher retain more ground moisture in summer, then dry out sharply when heating season starts. Many older homes in the area have minimal insulation in floors above crawl spaces, meaning subfloor temperatures track outdoor conditions more closely.

The combination of high summer humidity followed by dry, heated winters produces the maximum expansion-to-contraction cycle. If you’re seeing gaps in laminate flooring each winter, the solution isn’t to caulk them shut. Filling gaps with caulk or filler prevents the floor from expanding back in the spring and can actually cause buckling. The correct approach is humidity management. See our full laminate care and maintenance guide for seasonal care recommendations.

Gap Type	When It Appears	Closes in Spring?	Action Needed
Seasonal contraction gaps	Winter	Usually yes	Monitor; improve humidity control
Installation perimeter gaps	Year-round, worse in summer	No	A professional reinstall may be needed
Shifting or permanent gaps	Anytime, doesn’t reverse	No	Professional diagnosis required
Post-moisture-event gaps	After flooding or a leak	No	Address the moisture source first

How to Fix Gaps in Laminate Flooring

For Seasonal Gaps

For gaps in laminate flooring caused by dry winter air, the fix is humidity control, not flooring repair. Add a whole-home humidifier or portable humidifiers to bring indoor relative humidity up to the 35 to 55 percent range. Most seasonal gaps in laminate flooring will narrow or close entirely as humidity rises. If they don’t close after a full spring season, the issue is likely installation-related rather than purely climatic.

For Installation-Related Gaps

If gaps in laminate flooring are caused by inadequate perimeter expansion space, the most reliable fix is to remove the baseboards and check the actual gap between the plank edge and the wall. If planks are tight against the wall, cutting them back slightly with a pull bar and tapping tool can release the pressure and allow the floor to shift back into position. This is delicate work and is best handled by an experienced installer.

For Shifting or Structural Gaps

Gaps in flooring that are permanent or growing require a more involved approach. If the click-lock joints have failed, affected rows need to be relaid. If the subfloor has shifted or settled, the subfloor issue must be addressed first. Leicester Flooring’s installation team works with WNC homes regularly and understands the specific subfloor challenges in older Asheville and Hendersonville construction. You can schedule a free in-home measure to have us assess the situation before deciding on a repair approach.

What NOT to Do When You Have Gaps in Laminate Flooring

Don’t fill gaps in laminate flooring with caulk, grout, silicone, or any rigid filler. These materials prevent the floor from expanding back in humid months and almost always cause buckling. Hardening gap fillers are designed for hardwood floors only, where gapping behavior is different.

Don’t try to push planks back together by wedging objects against the wall. This can damage the click-lock mechanism and make the gap worse. Don’t ignore gaps that are growing. Gaps in laminate flooring that widen over time eventually allow debris, moisture, and cleaning products to reach the underlayment and subfloor.

Preventing Gaps in Laminate Flooring from the Start

The most reliable prevention for gaps in laminate flooring in WNC comes at installation. Proper acclimation of the planks before installation, correct perimeter expansion gaps at every wall, and appropriate underlayment all reduce the likelihood of problematic gapping. Our installation team follows all manufacturer specifications for acclimation and expansion during every Leicester Flooring installation. Learn more on our laminate installation page.

Frequently Asked Questions

Are small gaps in laminate flooring normal?

Small seasonal gaps in flooring that appear in winter and close in spring are within the normal range for WNC’s climate. Gaps wider than about 2 millimeters that persist year-round, or gaps that are growing, are not normal and should be professionally evaluated.

Can I use wood filler in gaps in laminate flooring?

No. Wood filler, caulk, and similar products are not appropriate for gaps in flooring. They harden and prevent the floor from expanding, which leads to buckling. If gaps need to be addressed, the cause needs to be fixed first, not the gap symptom.

How much do indoor humidity levels affect laminate gaps?

Significantly. A swing from 30 percent indoor humidity to 55 percent can cause laminate planks to change width by several millimeters across a 12-foot run. In WNC, winter heating often drops indoor humidity to 20 to 25 percent in older homes without humidification, which is more than enough to create visible gaps in flooring.

My laminate floor has gaps near one wall but not others. Why?

Uneven gapping is often a sign that the original installation left inadequate expansion space on one side of the room. As the floor expands in warm weather, it runs out of room on the tight side and shifts toward the side with more space, creating visible gaps. This usually requires a professional assessment to diagnose accurately.

Does Leicester Flooring repair existing floors with gaps?

Yes. We assess and repair laminate floors throughout Western NC. If you’re dealing with gaps in laminate flooring that aren’t resolving seasonally, contact us through our Asheville showroom or our Hendersonville location, and we can arrange an assessment.

Get Expert Help with Laminate Flooring Gaps in WNC

Leicester Flooring has been solving gaps in laminate flooring and other laminate challenges for WNC homeowners since 1971. Our non-commission staff will give you an honest assessment of whether the gaps you’re seeing are normal seasonal behavior or require professional attention. Browse our laminate flooring products or contact us to schedule a visit.