Our home was "stick" built in 2004-06. We have a fireplace insert in our basement family room. We had a full rear deck (66' long) which I had the middle 20' converted into a sun room in 2012. 2013 noticed a leak next to the chimney chase; several attempts to stop, I then checked cap of chimney & discovered loose caulking; Leak stopped for about 6 months then started again in earnest. Metal roof put on and leak continues, roofer cannot find. Sun room paneling & wet insulation pulled & it looks nasty in there now; need to make it finished again. Please help.