This photo shows why it's not a good idea to locate a heating system exhaust vent under a roof soffit. The heat from the
exhaust pipe melts the snow at the bottom area of the roof. When
the heating system cycles off, ice forms.
Subsequent cycling of the heating system allows the ice to build up.
When snow higher up on the roof melts, the water flow is blocked by the ice at the bottom
of the roof. This water is then forced back up under the roof shingles and finds its way down
into the exterior wall of the house.
Photo by Dennis Robitaille of
Able Home Inspection, Inc.
Do you have an interesting photo to
share of a unique or unusual home related issue or problem condition? E-Mail Dennis@Independent Home
Inspectors.org Credit will be given with your name and company, if it is used for the "Photo Of The Month."
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![[Photo of ice dam caused roof leak]](/inspection-photos/icedam.jpg "Photo of ice dam caused roof leak")