I have a Fisher wood burning insert in my living room (it was already there when I bought the house). After the stove has been up to temp for a while I can put my hand on the bottom side of the mantle and it is almost to the point of being too hot to touch for very long. This worries me as I like to load up the stove and let it burn overnight while we sleep in the opposite end of the house. The mantle is custom made out of some old lumber. Not sure what kind of wood it is or how old it is. It is unfinished, rough looking, just the way I like it. I haven't measured it yet but the bottom of the mantle sets at least 24" above the top plate of the insert. The insert sets out of the fireplace opening roughly 10". Is there any possibility that it could get too hot and catch fire?