An ice dam forms when the heat from your home escapes into your attic and melts the snow on your roof. The water will then trickle down your roof until it reaches the cold of an overhang, which it then freezes. Over time the Ice will get thicker and thicker which will form an ice dam. The ice dam is a small area that will hold water, which if it gets large enough it can back up under the shingles and into your home.
The most common method to fix ice dam is to do a little Waetherization to you attic. Sealing Air leaks between the warm interior and the attic is the first on the list. Then you will likely want to add insulation to your attic to help keep the heat in your home and not your attic. An additional step to be done it to add additional ventilation to your attic to help keep the temperature in your attic, below freezing.
For any questions on Ice Dams, Weatherilzation, or Insulation for your home, Contact Modern Homes, Inc.