Assessing whether the subfloor is contributing
- Uneven subfloors can create localised high points that stress joints differently across the room
- A subfloor moisture reading is normally taken as standard where gapping is paired with any swelling
- Old adhesive residue or debris left under the underlay can create hard spots that transmit movement unevenly
- Concrete subfloors that haven't fully cured before laminate was fitted can release moisture into the floor over time



