Ive got a 36" RCS Bluestar range about to be delivered. I ordered it with the island trim because we will have tile backsplash coming up to the edge of the trim. The installation manual requires at least 6" of noncombustible wall material be installed 6" below the island trim behind the range. What material do I use considering it also recommends 0" clearance to the wall. Do I run plain ceramic tile down the wall attached to sheetrock? or am I looking at a much more complicated fix?