I was hoping that some of you that own a Hearthstone Heritage stove could answer "What is the highest temperature you have had on the floor surface below your stove?". The hearth pad I'm building will suit the R=1.2 and protect the combustible sub-floor surface below but I would like to use a slab of granite on the top and the supplier has said that it cannot get too hot or it will pop, crack. I was looking at just using 1/2" tile but I'm using granite counter tops near by in the kitchen and maybe it's a good idea to keep it consistent throughout. The supplier has had experiences of cracking with over heating before but with this stove being generally made of soapstone I'm guessing the heat will not be as intense. Your input would be appreciated.