thanks for your reply. I had someone look at my chimney and he stated that the cause of the buckling was from the chimney not being secured properly to the house. He stated also that most of it should be replaced. Approximately 30 chimney blocks have to come down and be replaced. He is going to get back to me with an estimate. I looked online to see what the cost of chimney block was but have been unsuccessful. Do you have any idea or approximately how much something like this would cost? supplies, labor, etc? The blocks look to be 14'' x14''
(i didnt have a tape measure) Do you think it can be repaired instead of replaced?