My husband and I bought an older house in 2003. We put in all new windows and a new furnace. There always seemed to be a leak in the roof from the chimney and we always had to chip and repaint the chimney in the living room. We hired different people to come and check out the chimney on the roof and they always seemed to find a problem but it never helped. Finally we found a guy who noticed that the furnace was to be piped out through the basement wall and not up through the chimney. So we had that all done and it was good for a few years and now we noticed that the chimney in the house needs to be chipped and repainted again. What can we do to stop this from happening?