I have a project in mind and I would like some help. I have a large fireplace in my home that is faced floor to ceiling with a native flagstone (I think). I would like to replcate this look in another area of the house. The question is two part 1) If using the same flagstone how would I prepare an interior wall for this application and how is it applied. 2) Is there a liteweight product that could similate the real thing that might be easier to apply?