If the chimney flashing cannot be waterproofed once work begins, an additional charge may be added to the contract price to replace the flashing or counter flashing unless otherwise stated in your contract. Sometimes on older homes the brick on the chimney or the cap on top of the chimney will settle and sometimes cause cracking which may cause leaking later on down the road if it is not already leaking. We can only assume liability for the flashing around the chimney that we change out. If we see a problem we will let you know immediately and inform you of your options and how we might be able to help you.