This is my first winter in my current house in northeast USA with lots of snow. There is a ~2ft overhang on the roof all around the house (for better or worse, as noted in another question with pics of roof). As I smack large icicles off the edge of the eaves to avoid them getting too big/heavy/hazardous, I wonder if we'll have ice dams at this house.
The attic could use more insulation and ventilation but it does have some, so that has me on the lookout for ice dams. So far we have tons of snow accumulating on the roof (including the peak) and icicles but no visible bulks of ice on the gutters/roof edge.
I'm wondering how the long overhangs would affect ice dam formation. One thought is that if an ice dam forms and water is sitting above it, the overhang could be damaged (and the rest of the roof due to the weight) but I'd expect water would not dam far up enough to go into the house/walls. Another thought experiment tells me that the overhanging 2ft of roof will be far colder than the rest of the roof (being exposed to outside air beneath it rather than attic air), which could lead to very large and heavy ice dams?
Looking for some expertise/experienced views on this. Thanks in advance.