Our late-60s ranch came with a 10x20 wall of fabulous wood paneling. It's not the junk with grooves, but real-deal, full-slab wood paneling (painted).
Unfortunately, it warps a lot with typical changes in humidity. When we bought the place, the owner's son said something about it being installed wrong in the 60s, so it would 'breathe' and move throughout the year. One day a year, it's perfect; the rest, you can see it cup or warp out of level.
I suppose I can hire a guy with a nail gun to re-execute it in MDF, but we'd like to figure out what went wrong, and whether it can be fixed.
What trade has the expertise in paneling that can diagnose it? A cabinetmaker? Is there a kind of trim carpenter that specializes in paneling?