Signs of Roof Damage

One of the hardest things about replacing or repairing a worn-out roof is finding a roofer you can trust to do high-quality, professional work.


Ceiling Spots

  • Caused by leaks in roof
  • Check attic or crawlspace for leaks in deck
  • Check chimney and vents for cracks in flashing
  • Check rafters for leaks that travel away from original source
  • Check roof for damaged shingles

Damaged Flashing

  • damaged-flashingCaused by improper installation
  • Caused by drying and cracking
  • Can usually be repaired without replacing roof

Missing Shingles

  • mising-shinglesCaused by improper fastening
  • Caused by exposure to high winds
  • Can usually be replaced individually


Buckling & Curling Spots

  • buckling-curling-spotsCaused by improperly applied felt (buckling)
  • Caused by movement in deck (buckling)
  • Caused by undersaturation of felt in organic-based shingles (curling)


  • blisteringCaused by moisture in shingles
  • Caused by excessive use of asphalt plastic cement


Algae Growth

  • algaeCaused by growth of airborne algae deposited on roof
  • Unsightly appearance does not affect the service life of the material
  • Common problem in warm, humid climates
  • Algae resistant shingles available regionally

Missing Granules

  • granulesCaused by absorption of moisture by mat at the core of the shingle
  • Common problem with organic-based shingles



  • rottingOn newly applied shingles, a certain number of loose granules is normal
  • On aging shingles, missing granules indicate need for replacement