Ice dam


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Ice dam

A ridge of ice that forms along the lower edge of a roof, possibly leading to roof leaks, caused by heat leaking from the attic, which melts snow on the upper parts of the roof. The water then refreezes along the colder eaves and works its way back up the roof and under shingles, thus causing leakage.

ice dam

ice dam
A buildup of snow and ice at the eaves of a sloping roof.
References in periodicals archive ?
"It will burn a channel through an ice dam or snow and allow the water to torpedo down into the gutter," he said.
Betterview, the software platform and service provider that uses drones to capture and analyze building and property data, and Understory, Inc., a weather network and analytics company, recently announced a strategic partnership will now allow Betterview users to review historical hail, high wind, precipitation and ice dam data before sending a drone out to inspect buildings & properties.
Not only did Schoolcraft stay on top of all service requests and vendor meetings, he also tackled snow removal and ice dam repairs totaling more than $100,000.
If temperatures cool rapidly, the melted water that has migrated to the drainage areas freezes, forming a dam that holds back water and creating a ponding water area behind the ice dam, Herring explains.
She lived in a mansion and had an ice dam on the roof."
We know from experience that misguided attempts to remedy problems at the last moment, such as trying to thaw a frozen pipe with a torch or chipping away at an ice dam with a hammer, can lead to disaster.
([double dagger]) Constructing a vented "over-roof" over the top of an unvented "under-roof" is common in high snow load areas to control ice-damming (see "Dam Ice Dam," ASHRAE Journal, June 2010).
The classic view of the Younger Dryas cooling interlude has been that an ice dam in the North American ice sheet ruptured, releasing a massive quantity of freshwater into the Atlantic Ocean.
A jokulhaup is the Icelandic term used to describe a glacial outburst flood resulting from the failure of a glacier ice dam or from the melting of glacier ice by a volcanic eruption.
It was caused by the ice dam clogging the Neva, resulting in flooding of nearby cities.