Symptoms
- Visible gaps between laminate boards
- Boards that don't feel fully locked together
- Dirt collecting in the gaps
- Gaps more noticeable after a change in season
Likely causes
- CommonBoards not fully engaged during installationIf the click-lock system wasn't tapped completely together, small gaps remain.
- CommonInsufficient expansion gap around the room's perimeterWithout room to expand and contract with humidity, laminate can separate at various seams.
- PossibleSeasonal humidity changesLaminate's wood-fiber core responds somewhat to humidity swings, similar to solid wood, though less dramatically.
- PossibleSubfloor unevenness preventing full board engagementA dip or high spot can keep a board from clicking fully into place.
What to do
- Use a tapping block and mallet to gently tap gapped boards back together, working from a fixed point toward the gap.
- Check the expansion gap under baseboards or quarter round around the room; it should typically be about a quarter to three-eighths of an inch, though check your product's installation guide.
- If the gap is missing or too tight, temporarily remove the baseboard/quarter round nearest the affected wall and trim back the flooring slightly for clearance.
- Reinstall the baseboard or quarter round without nailing it directly into the flooring, which should float freely underneath.
- For gaps that won't close by tapping, the row of boards may need to be disassembled back to the gap and reinstalled with better engagement.
- Monitor indoor humidity, since keeping it in a moderate range reduces ongoing seasonal gap changes.
- For a widespread or persistent gapping issue, consult a flooring installer about whether the subfloor is contributing.
Tools and parts
- Tapping block
- Rubber mallet
- Pull bar
When to call a pro
Call a flooring installer if gaps are widespread or keep reappearing after adjusting the expansion gap.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.