I hear you on the insulation making a bigger difference than shingle type, especially up here where the winters are brutal and the sun’s not exactly beating down most of the year. I’ve seen a lot of homeowners invest in “cool” shingles thinking it’ll help with summer heat, but honestly, in Minnesota, it’s usually the attic insulation and ventilation that matter most for both comfort and ice dam prevention.
Ice dams are such a pain. Even with new shingles, if there’s heat leaking into the attic and melting snow unevenly, you’ll still end up with those big ridges of ice at the eaves. I’ve been called out to plenty of homes with brand new roofs—sometimes even upgraded underlayment—and they still get leaks during the thaw because warm air is escaping from below. Sometimes it’s as simple as a missing baffle or a poorly sealed attic hatch.
I’m curious if you or anyone else here has tried adding extra roof vents or ridge vents to help with airflow? I’ve seen mixed results—sometimes it helps, sometimes not so much if the insulation isn’t up to par. There was one house last winter where we added a couple of box vents and beefed up the cellulose insulation, and that seemed to do more than any shingle swap ever did.
Also, has anyone experimented with heat cables along the eaves? I know they’re not a perfect fix and can be kind of an eyesore, but in some cases they seem to be the only thing that keeps water from backing up under the shingles during those freeze/thaw cycles. Just wondering if folks have found them worth the hassle or if they’re more trouble than they’re worth...
It does seem like sometimes the old-school approach—good insulation, solid ventilation, and regular roof raking—still wins out over all these new products. But maybe there’s something I’m missing?
I’ve noticed the same thing—ventilation only really helps if the insulation’s already solid. I’ve seen folks add a bunch of roof vents thinking it’ll fix ice dams, but if there’s still warm air leaking up, it doesn’t do much. Heat cables are kind of a last resort in my book. They work, but they’re ugly and can be a pain to maintain. Honestly, sealing up attic bypasses and making sure the hatch is tight has made a bigger difference for me than any fancy shingle or vent.