What are the signs your roof needs to be replaced?

The most common signs your roof needs replacement include missing, cracked, or curling shingles, which expose the underlying structure to water damage. Granules collecting in your gutters indicate shingles are deteriorating. If your roof is 20 to 30 years old, it's likely near the end of its lifespan regardless of appearance. Other warning signs include sagging areas, which suggest structural damage or rot, and daylight visible through the roof boards in your attic. Water stains on interior ceilings or walls, persistent leaks after repairs, and moss or algae growth that has penetrated the shingles also signal serious problems. If repairs are becoming frequent and costly, full replacement is usually more economical in the long run.