Ice dams and ice cycles are a product of snow melting from a warm roof and then freezing when they get to the cold edge of the roof.
Snow melts from a roof more quickly when heat from inside the house escapes through the attic. This is wasteful and the home or business owner has to pay to heat the air throughout the day.
The solution is to properly insulate and air seal the attic space. Nicor and other sources have incentives to make these improvements easier to achieve.
John discusses how proper air sealing and insulating helps with ice dams and ice cycles in homes which would be part of his green jobs initiative. This is a win win situation where people's houses become more energy efficient, green good paying jobs are created, and home owners would save on their heating and cooling bills.