Flooring guide
Why Is My LVP Floor Separating?
Troubleshoot LVP plank gaps and separation by checking locking system stress, subfloor flatness, moisture, expansion space, cabinets, and long runs.
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What issue are you seeing?
Jump straight to the symptom that most closely matches the floor problem.
Quick answer
LVP floors usually separate when the locking system is stressed, unsupported, damaged, trapped, or moving more than the floor was designed to handle. Uneven subfloors, missing expansion space, moisture, heavy fixed cabinets or islands, long runs, and installation damage are common causes.
The fix depends on whether the planks are simply out of position or whether the locking edges are damaged. If joints are broken, swollen, or repeatedly opening, repair may require lifting the floor and replacing planks.
Troubleshooting flow
Diagnose the problem before choosing a repair
Start with the pattern, check the most likely causes, then decide whether the repair is simple or needs an installer.
Locking stress
- Likely symptom
- End gaps or joints reopening
- What to check
- Inspect locking edges and nearby flex.
Uneven subfloor
- Likely symptom
- Gap returns in one traffic path
- What to check
- Check low spots, humps, and hollow movement.
Pinned floating floor
- Likely symptom
- Gaps near cabinets or transitions
- What to check
- Check expansion space and fixed objects.
Moisture
- Likely symptom
- Swollen edges or lifting
- What to check
- Look for slab moisture, leaks, or wet cleaning.
| Possible cause | Likely symptom | What to check |
|---|---|---|
| Locking stress | End gaps or joints reopening | Inspect locking edges and nearby flex. |
| Uneven subfloor | Gap returns in one traffic path | Check low spots, humps, and hollow movement. |
| Pinned floating floor | Gaps near cabinets or transitions | Check expansion space and fixed objects. |
| Moisture | Swollen edges or lifting | Look for slab moisture, leaks, or wet cleaning. |
What to check first
- Mark every gap and note whether it reopens after being closed.
- Check whether the floor is floating or glue-down.
- Inspect expansion space around walls, transitions, cabinets, and islands.
- Look for broken locking tabs, swelling, or nearby subfloor flex.
When to call a professional
- Gaps keep returning after closing.
- Several joints are opening or planks are lifting.
- The floor may be pinned by cabinets or fixed objects.
- Damaged planks may need replacement.
Floating floor movement visual
Floating floor movement concept
Visual example only. Final layout depends on product requirements, field conditions, and installer judgment.
When to call an installer
Call an installer if gaps keep returning, the floor is lifting, several joints are opening, moisture is suspected, or the floor is trapped under cabinets or fixed objects. A professional can usually identify whether the problem is subfloor support, expansion, moisture, or damaged locking edges.
If the plank locking system is damaged, repair may require replacing affected planks rather than simply tapping the floor together.
Example scenario
A floating LVP floor starts separating near a kitchen island a few months after installation. The same end gaps reopen after being tapped closed, and the floor feels tight at the island trim.
The likely issue is not just loose planks. The island may be restricting floor movement, causing stress to show up at the joints. The repair should start by checking product instructions, expansion space, and whether damaged planks need replacement.
Industry References & Further Reading
These resources are useful starting points for checking industry-aligned installation principles. Product instructions and installer field judgment still control the final project details.
People with this problem also investigate
Compare nearby symptoms and jobsite conditions before deciding whether the issue is material, moisture, movement, subfloor, or layout related.