An ice dam is a patch of ice that forms at the edge or valley of a roof and prevents melting snow from draining off the roof. The water that backs up behind the dam can leak into a home and cause damage to the roofing system and substrate as well as interior walls, ceilings, insulation, and other areas. Ice dams form by melting snow running down a roof and freezing again before they hit the gutter and downspouts. The snow on a roof surface that is above 32°F will melt. As water flows down the roof it reaches the portion of the roof that is below 32°F (outside the warm wall of the homes) and freezes.
Protect your family and property during winter weather with a snow retention system. They are used to prevent snow and ice sliding off of roofs that come from changes in temperature or weather.