I have a Schrader Fireplace that I had a contractor friend of mine move about a foot over. It was previously about 3 feet off one wall and 5 feet off the other. He put Durock on the wall flat against the sheet rock. Now the stove sits about 14 inches from the wall on the side, but the back is only 8-3/4 inches from the Durock at the closest point. Is this safe? I say no, but when I talked to him his words were, "Don't worry about the 10" as long as it's at least 8" it's good if anything you can put another layer of durock just to be safe" My plan is to put a stone veneer over the Durock. Any advice is appreciated.