Roof Leaks and Moisture

Roofing problems can develop at any time. Most asphalt/fiberglass shingles are make to last about 15 years but you should begin to expect some problems around 8 to 10 years. Signs of attic leaks or moisture:

  • Structural sagging, wavy roof fame and sheathing
  • damaged, warn or missing shingles, moss growth
  • corroded flashing
  • Raised shingles along the botton of roof
  • icicles haning fom gutter in the winter
  • stained/discolored or delaminating sheathing, damp or discolored insulaion
  • rusted nails and rust stains on sheathing
  • water spots or black marks on the ceiling or at the juntion betwee ceiling and wall
  • water marks around ceiling fixtures

Rain or wind: Some roof problems occur when wind forces the rain under the edges of the roof or shingles.

Ice Dam: is an accumulation of ice at the lower edge of a sloped roof. They form when there is a layer of snow on the roof, which melts due to heat loss from the house ino the attic.

Moss: Wood and built-up roofs are vulnerable to the deterioration by moss for its ability to retain muisture.

Water Vapor: Exfiltration of warm moist air to drier colder air results in condensation, mold and mildew and wood decay.

For more information visit:

Post Noes - Volume 5

Pillar To Post - Professional Home Inspection News and Information

34 Old Coach Road, St. Catharines, ON  L2N 2P5