While most homeowners have likely heard of ice damming, many people are unsure of how ice damming is caused, how damaging it can be to their roof, and how they can prevent ice damming from ever forming or causing damage.
In this article, we answer each of these questions and provide some helpful tips on how to ensure your home and roof are protected during the winter months and beyond.
What is ice damming?
Ice dams are ridges of ice that form at the edge of a roof due to continuous melting and refreezing of snow. This ice blocks snow and water from draining off of roofs and can cause foundational issues and leaking in improperly insulated and ventilated homes.
What causes ice damming?
Caused by inclement weather (heavy snow then warm temperatures) and/or poorly insulated attic heat-escape that melts snow, ice damming occurs due to lack of insulation or the backing up of frozen slush from eavestroughs. For ice dams to form, snow on a roof must be present, and higher parts of the roof must be warmer than lower parts of the roof. As snow on the higher part of the roof melts, and water begins to trickle down to cooler parts of the roof, ice forms and a dam begins to build.