Cause Of Ice Dams On Roofs

The main cause of ice dams is warm roofs.

Cause of ice dams on roofs.

If you don t have the proper amount of insulation in your attic heat will leak out through the roof. Ice dams form at the bottom of roofs letting water penetrate and cause damage to the interior of walls and roofs. This then causes any snow on the roof to melt and run down towards the gutters. One major cause of ice dams is clogged gutters and downspouts preventing the melting snow from draining away from the roof.

When snow melts on a roof it runs down until it meets the unheated bottom edge of a roof and then freezes. Ice dam cause 3. Radiant heat from the sun. This chunk of ice is called an ice dam and it can cause water to backup beneath shingles and ice dams cause damage to walls and.

Temperatures can hold below freezing during the day and during the night but ice dams can continue to form if the radiant heat from the sun manages to melt the snow on your roof despite the ambient temperature being below freezing.