I ran into something while installing my new flex liner and wanted to see what some of you thought. My stove is in the basement with an outside masonry chimney. The old clay thimble went through the brick wall in the basement below the outside grade by just a few inches. The outside wall of the masonry chimney is about three inches from the outside of the basement wall. The out thimble went between the two, basically just under the ground. I broke the old clay thimble out and found this out when dirt and landscape rocks feel into the basement. I am wondering if I need to do something about this or just put the new SS snoot for the Tee through the basement wall and into the chimney. It will then be covered with dirt or rocks for about three inches. I though about digging down between the chimney and the basement wall outside then put the snout through and seal it with caulk the best I can and maybe pour some concrete mix over it ???