Gaps Opening Between LVT Planks
Thin gaps opening between vinyl planks usually mean movement, temperature swing or a bond that never took. Here is how to tell which.
The short answer: a gap between vinyl planks means the planks have travelled. Either the floor was laid with too little tolerance and is now pushing itself apart at the weakest joint, or the room's temperature has swung far enough that the material has physically shrunk back from where it was fitted.
That distinction matters because the two situations get treated completely differently. A floor that has shrunk in cold conditions may close up again on its own once the room settles. A floor whose joints have been forced apart by pressure elsewhere will keep opening until the pressure is released.
Neither is normally a sign that the material itself is faulty. Vinyl is a stable covering by design, and when it starts drifting there is almost always something about the room, the heating or the original preparation that explains it.
Read the pattern of the gaps before anything else
A single gap in the middle of an otherwise tight floor points to one joint that failed. Gaps that repeat evenly across a whole run point to shrinkage or a bond that never held across the area. Gaps that appear only along one wall, usually the sunniest one, point to heat.
- One isolated line — a joint that was never fully engaged when clicked together
- Repeating fine lines across the room — thermal shrinkage or general slippage
- Gaps concentrated near patio doors or a south-facing window — heat cycling
- Gaps that widen and close with the seasons — normal movement with too little tolerance
Why click vinyl and glue-down vinyl fail differently
Click systems float, so the whole covering behaves as one sheet. If any part of it is trapped — under a heavy unit, pinched by a door frame, held by a screwed-down threshold — the rest of the sheet keeps moving and the joints furthest from the anchor point pay for it.
Glue-down vinyl cannot travel unless the adhesive lets go. When gaps appear on a bonded floor, the honest conclusion is usually that the bond was compromised: adhesive applied too thin, laid outside its working time, or spread over a dusty or slightly damp base.
Temperature is the cause people underestimate
Vinyl responds to warmth. A conservatory or a room with unshaded glazing can swing many degrees between a summer afternoon and a winter night, and the covering shortens and lengthens accordingly. That movement is designed for, but only if there is somewhere for it to go around the perimeter.
- Rooms that get switched off entirely while a property is empty
- Underfloor heating brought up to temperature too quickly after fitting
- Direct sun falling on the same strip of floor every day
- Coverings stored cold and laid the same day without acclimatising
Table: what the gap tells us
| What you see | Usual explanation | What normally puts it right |
|---|---|---|
| One gap, rest of floor tight | Joint never fully closed at fitting | Lift back to that joint and re-engage |
| Even fine gaps throughout | Shrinkage after a cold spell | Restore heating, reassess before any work |
| Gaps plus a raised joint | Floor trapped and pushing | Free the pinch point, then re-close joints |
| Gaps on bonded vinyl | Adhesive bond failure | Strip the affected area and re-bond |
How we check it on a survey
We measure the perimeter tolerance behind the skirting or beading, look for anything screwed or fixed through the covering, take a moisture reading on the base, and lift one plank away from the visible fault to see how the underside and the base have behaved. That is normally enough to separate a movement problem from a bonding problem in a single visit.
Repairs that hold and repairs that do not
Filling a gap with a flexible sealant hides it for a few weeks and then splits, because the floor keeps moving. The repairs that last address the reason for the travel first: releasing whatever is trapping the covering, reinstating tolerance at the perimeter, or removing and re-bonding the section that lost its grip.
Where the same plank has been lifted and re-clicked several times, the locking profile eventually wears and stops holding. At that stage swapping in fresh planks from the same batch is the sensible move rather than persisting with tired ones.
Keeping a repaired vinyl floor stable
- Let new material sit in the room it will live in before it is laid
- Bring underfloor heating up gradually rather than in one jump
- Avoid fixing thresholds, tracks or rails through a floating covering
- Keep heating ticking over in rooms left empty for long spells
When gaps mean the floor should be relaid
If joints have opened across most of a room and several planks show worn locking edges, chasing individual gaps stops being sensible. Relaying the area with proper tolerance and, where needed, corrected preparation underneath gives a floor that stays shut instead of one that needs revisiting each season.
Frequently asked questions
- Will the gaps in my vinyl floor close up on their own?
- If they opened during a cold spell and the room has since warmed back up, some shrinkage gaps do close. Gaps caused by the floor being trapped or by adhesive failure will not close without work.
- Can a gap between planks be filled rather than repaired?
- Filler and sealant are cosmetic and tend to split as the floor moves again. We would rather fix the movement than disguise it.
- Does one gap mean the whole floor was fitted badly?
- Not usually. A single unengaged joint is a localised issue. Repeating gaps across the room are the ones that suggest something wider about the preparation or tolerance.
- Can you repair gaps without the original planks?
- We can often work with what is left over from the original job. Without spare material, colour and batch matching becomes the limiting factor and we would discuss that before starting.
Keep reading
Why LVT planks or tiles curl, peel or lift at the joints, and how our fitters diagnose and put it right.
Why laminate boards separate over time and how we close the gaps or refit the floor correctly.
Click LVT or glue-down LVT? Compare stability, feel, subfloor needs and cost before choosing your fitting method.
A hollow or drummy noise underfoot means the covering is not in full contact with the base. Here is what causes the void and how it is closed.
See how we survey, prepare and fit LVT across Kent.
See how we survey, prepare and fit vinyl across Kent.
Talk it through with a fitter, not a call centre
If planks on your floor are drifting apart, we can look at it and tell you whether it needs re-closing, re-bonding or relaying. Ask us for a survey.