![](http://www.alamy.com/thumbs/6/A0F540CA-70F1-476C-9387-7CB8F310A1B6/2F4N1K3.jpg)
If you see icicles hanging from the edge of a roof, it may be a sign of an ice dam. An ice dam is a ridge of ice that forms along the edge of a roof.
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Photo credit: © Manfred Glueck / Alamy / Afripics
License: Licensed
Model Released: No
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