Starboard rear hatches on a 20

[CaptMick]

starboard will warp overtime.

Is it really a warp or just expanding and contracting?

I have been working with it over the past year as a counter top on a desk that is outside at a marina and the stuff sure will expand and contract over the seasons but in the year I have had zero issues with warping... on the counter top. That stuff ain't cheap either.