I've fitted solid oak throughout my hallway.
8 inch wide, 1inch thick screwed and pelleted down to the concrete slab below with no issues on a main thoroughfare getting wet etc.
Timber is indeed hydroscopic so can take in and let back out water so should ideally be in a moisture stable environment.
If it is a laminate you are looking at, you can get laminates for wet areas and they are much better than they used to be.
Make sure the floor slab is smooth, if not a little latex levelling compound can sort out evils.
Use a decent underlay and away you go.
It's not rocket science, even Specialone can fit it...
