What causes laminate boards to gap
- Humidity swings — laminate cores absorb and release moisture from the air, especially with central heating cycling seasonally
- Insufficient expansion gap at walls or fixed obstacles when the floor was originally fitted
- Thermal movement from underfloor heating or strong direct sunlight through glazed doors
- Delamination at the click joint itself after repeated flexing, which stops the joint pulling fully tight
- Subfloor moisture ingress causing uneven swelling across the room
- Furniture or fixed units screwed through the floating floor, pinning it and forcing movement elsewhere



