So I bought the englander stove from HD, the smaller one and the chimney kit. This is going to be installed in an unfinished basement. Foundation is about 6 feet. So I am going to go up in the basement and then I want to go out right above the foundation and below the floor/ceiling. There is like a 10 inch wood gap from the top of the foundation to where the floor/ceiling begins. My question would be, outside the house the wall thimble will not be a problem, inside the space for the thimble is too small. Can I trim some of the thimble? It would not be that much, but didn't know if this would be ok or not. I am also going to put a piece of heat shield on the exposed floor/ceiling. Hope this all makes sense. What do you think?