I've ordered an undermount sink for the kitchen. The worktops are going to be granite, and the granite supplier suggested fitting the sink to the base unit with MDF, such that the lip of the sink is the same height as the top of the carcass.
Has anyone had any experience of MDF in this situation? Isn't it prone to damage by water? Wouldn't treated chipboard (or even an off cut of the old worktop) be better?