Get Roof Heating Cables InstalledWhat causes ice dams?An ice dam is a ridge of ice that forms at the edge of a roof and prevents melting snow from draining off. The water that backs up behind the dam can leak into a home and cause damage to walls, ceilings insulation and other parts of the house.An ice dam might form when…- There is snow on the roof- Average outside temperature is below 32°- Roof surface temperature is above 32° at it’s higher end and below 32° at it’s lower end.How it formsIndoor heating rises through the ceiling into the attic and warms the roof surfaceSnow on the heated part of the roof melts and flows down until it reaches that part of the roof that is below 32°. Water freezes into an ice dam.The dam grows as it is fed by melting snow above, but water held by the dam backs up and stays liquid.Eventually, the water finds cracks in the roof covering and flows into the attic from where it could seep through the ceiling and interior walls.A SIMPLE SOLUTIONTO AVOID COSTLY ICE DAMS
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