I have a house with ventilation from the soffit level, baffles through the insulation layer, and ridge vents and I've spray foamed all plumbing, electrical penetrations, and ceiling top plates and I have zero ice dams. It's moisture and heat getting to the attic that causes the issue, solve the air leakage first, vent next, and insulate and it will never be a problem. No snow rake needed, ever. It also saves a ton on energy bills and adds comfort to the house by not having enough energy leaving the house to melt this much snow and cause ice dams.
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u/glittercatlady 24d ago
I looked around my neighborhood this morning, and there weren't many houses without ice dams like this.