Just had a certified chimney sweep give me an estimate for installing a 6 inch flexible insulated liner. Approximately 30 feet. He would have to bust out the clay tiles, and he gave me a estimate of $2850. He said that is max the price will be, if everything goes smooth could be closer to $2000. Seems kind of pricey but thought I would ask the experts on here what they thought. Flexible liner is due to the offset in the chimney