Ok so I fired up the Isle Royale!! What an animal of a stove The only prob I have, I talked to the tech's at Quadra fire and I specifically asked them about R rating for the floor. They said there is no R rating so I told him that if there was no R rating I would then put 1/2 durock over the plywood floor and then 1/2 black granite. He told me that would be fine. About 2 hrs into my burn you can not lay ur hand on the granite underneath the stove. It is really hot! Is that normal ? Wondering if he steered me in the wrong direction telling me there is no R rating for the floor or is the 1/2 durock and 1/2 granite is ok and getting that hot is normal. Thanks. Sorry for the abbreviations typing from my phone.