KEEPING ICY ROOFS IN CHECK: WHAT’S YOUR GO-TO TRICK?
You’re spot on about baffles being just one piece of the puzzle. I’ve managed a few properties where we paired baffles with added soffit vents and, in some cases, a solar-powered attic fan. The real improvement came when we addressed both intake and exhaust—just adding baffles didn’t cut it, especially in older homes with chopped-up rooflines. I’ve also noticed that if the insulation isn’t air-sealed around penetrations (like light fixtures), you still get condensation issues, no matter how much you vent. It’s a balancing act for sure.
I’m still figuring this out myself, but last winter I learned the hard way that just tossing more insulation up there doesn’t magically fix ice dams. My place is a 1960s ranch with a low slope and barely any attic space, so crawling around to seal gaps was... not fun. I did notice a huge difference after stuffing some insulation around the bathroom fan vent and sealing up random holes where old wires came through. Still got a little ice at the eaves, but way less than before. I guess it’s never just one thing—kind of like playing whack-a-mole with leaks and drafts.
Funny you mention the bathroom fan vent—those things are sneaky. I’ve seen folks dump a ton of insulation but skip sealing around vents and pipes, and then wonder why they still get ice dams. Low slope roofs are a pain for airflow too. Ever tried adding those baffle things (rafter vents)? Sometimes they help, but honestly, on older houses with tight attics, it’s tough to get it perfect. Did you ever look into heat cables for the eaves, or did you just stick to air sealing?
Ever tried adding those baffle things (rafter vents)? Sometimes they help, but honestly, on older houses with tight attics, it’s tough to get it perfect.
That’s been my experience too. I’ve managed a few properties with low-pitch roofs and cramped attics—installing baffles was more of a wrestling match than anything else. Air sealing around vents and pipes made a bigger difference than just piling on insulation. As for heat cables, I’m skeptical. They’re a band-aid at best and can drive up the electric bill fast. I’d rather focus on fixing the root cause, but sometimes you just have to pick your battles with these old houses...
Yeah, baffles are great in theory until you’re on your back, wedged between rafters, trying to fit them past old nails and cobwebs. I’ve had better luck just chasing down all those little air leaks—around bathroom vents, chimney chases, even random electrical runs. One winter we skipped the heat cables and just did a marathon with a can of foam and some weatherstripping... made a bigger dent in ice dams than I expected. Heat cables still feel like a last resort to me, especially with how much they cost to run.
