I have a hairline crack at the very beginning of the flue in the chimney -- they dont know how long its been there -- they don't know if its dangerous -- all from a picture taken by the guy that cleaned it ---these are the options --- they just know that i better put in a whole new fireplace -- they guy that inspected it stated he might be able to tap it -- but he had to show the boss --- who told him no -- another fireplace guy looks at the picture and said he could maybe caulk it -- but he said no as well --- all without looking i have the photo --- can you look at tell me whats up?