Originally Posted by nick13
so you're saying that more insulation in the attic will stop the ice from melting into the house.? am i wrong in think that my gutters are flling with ice and it's getting under the shigles. they do fill with ice and end up with enormous icecicles hanging from them
Usually what occurs is the the attic is under-insulated and the heat rises up and melts the snow on the roof. The melted snow - now water travels down the roof until it reaches the over hang where it is cooler. The cooler section freezes the water and creates an ice dam. More snow melts up higher on the roof and when it reaches the ice dam it cannot flow over the ice dam so it works its way up under the shingles and then leaks down thru the roof.
If you have the proper amount of insulation then the heat will not melt the snow on the roof as fast. Then if you have a soffit vent and a roof vent this will circulate the air and keep the under side of the roof from melting the snow.
Plus the added insulation will reduce your heat bills.
Do not block the soffit vents with insulation.
It would also help if you did have ice/water shield installed.
Do you know if ice/water shield is under the shingles?