Delamination
Gaps
Buckling
Convex Bowing
Lines in the carpet
Noisy flooring
Cupping or concave bowing
Splits and checks in wood
Wrinkled carpet
Subfloor flatness does not cause warpage of vinyl planks!
Cleaning does not cause warpage of vinyl planks
Warpage, cupping, concave or convex bowing is not caused by lack of expansion space or subfloor not flat and smooth (level)