Don Tuite wrote:

I know, particleboard underneath. But if they don't rot out around
your sink, they must be pretty rot-proof.

They don't rot, but they will swell and disintegrate if they stay wet. They
stay together because the installer uses various tricks to make sure the water
stays where it's supposed to be.

George Patterson
A diplomat is a person who can tell you to go to hell in such a way that
you look forward to the trip.