Common Problems

 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

  • Caused by improper installation (on new roof)
  • Caused by drying and cracking (on old roof)
  • Can sometimes be repaired without replacing roof

Missing Shingles

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

Buckling Shingles / Curling Shingles

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

Blistering

  • Caused by application over wet deck
  • Caused by moisture in shingle
  • Caused by inadequate ventilation

Algae Growth

  • Caused 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

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