When replacing a roof, it’s important to remove the old layer of shingles and completely replace it. However, sometimes a roof can be installed over an older layer. If this is the case with your roof, and it’s older than 20 years old, you need to replace it.
Another indicator you need to replace your roof is if you notice your neighbors are replacing their roofs. Typically homes built in a close time period, and undergoing identical weather conditions, will age the same. So if you notice your neighbors springing for a new roof, it’s time you do the same!