The most common sign is water damage. If you notice any water stains or damp patches in your ceiling, then this could suggest that there is a tear in the roofing material or compromised sealant around one of your roof fixtures, such as a vent pipe, chimney stack, etc., allowing moisture to penetrate through.
If you find shingle granules (small gravel-like particles) in your guttering or downpipe, it could indicate wear and tear on the surface layers of your shingle material. Shingles can naturally shed over time due to weathering factors we cannot control, such as UV Ray erosion and wind-bouncing debris against it.
If you are experiencing these situations, be sure to contact Action Exteriors ASAP for a free roof inspection.