I have an old laminate floor. In summer it always showed signs of buckling. Now I fixed it by installing an expansion gap of about 0.6 inch (15mm) against the wall. Now the buckling is gone. However I fear, that because its summer the laminate will retract beyond the skirting board - which is also only 15mm thick - when temperatures drop and the laminate begins contracting again.
I have done this the first time and did not read anything about the obvious fact that laminate flooring will have its maximum dilatation in summer when it is hot and humid. So for next time, must season be considered when installing an expansion joint?