The answer to 'signs of roof replacement damage' is that there are several key indicators that your roof may need to be replaced. These include visible damage like missing, cracked, or curling shingles, as well as leaks in the roof or water stains on the ceiling. Additionally, an aging roof that is over 20 years old may need to be replaced, even if it doesn't show obvious signs of wear.
If you notice any of these issues, it's best to have a professional roofing contractor inspect your roof to determine if a full replacement is necessary. They can assess the extent of the damage and provide recommendations on the best course of action.