6. Does my roof need to be replaced?
If you are missing shingles, your shingles are more than 25 years old, there are no granules left on your shingles, tabs are flipping up or if the shingles are brittle, then yes, you likely need a roof replacement.
However, just because your light colored roof is now streaked with solid black or has moss growing on it does not mean that you need a new roof. Rather, it most likely just needs cleaning.