I had a new roof replaced after the hurricane Fran in 199?. Still have leaks around my chimney on the inside of the house at the ceiling. My chimney is synthetic rock. Have had several people come and look and see no problem. Could the water be coming through the rock, a crack, or do I need to have chimney reworked? I am at a loss. The county inspector also came out and look at new roof replacement and said everything look good. Please advise.