Question about a new hearth I plan on putting in for my Jotul Oslo. Am remodeling my basement and ditching the current hearth pad I am using. Question is, my plan is to put down a Pergo laminate wood floor and then a piece of granite on top of it. Do I need to put anything under the granite pad or can it just sit on top of the Pergo floor? So I would have the concrete floor, Pergo pad, then Pergo laminate flooring, then granite. Is that okay or do I need something between the Pergo flooring and the granite?