KEEPING ICY ROOFS IN CHECK: WHAT’S YOUR GO-TO TRICK?

I hear you on the heat cables - ran them one year, and my electric bill nearly doubled. I’ve had more luck just piling on extra insulation in the attic, but it's a pain crawling around up there. Anyone ever tried those roof rakes after a big snow? Worth the hassle or just cosmetic?

Roof rakes actually do more than just make things look tidy. If you can get to the lower few feet of your roof after a storm, pulling that snow off helps prevent ice dams from forming at the eaves. It’s not a cure-all - if you’ve got poor insulation or ventilation, you’ll still get some issues - but it can buy you time and reduce risk. Just watch out for damaging shingles if it’s super cold or if you’re using too much force. I’ve seen folks gouge their roofs without realizing it.

I tried using a roof rake for the first time last winter after hearing horror stories about ice dams. It definitely helped clear the edge, but I was surprised how easy it was to scrape up some of the shingles - especially when it was below 10°F. My house is older and the insulation isn’t great, so I still got a bit of ice buildup, but less than before. I’m thinking about adding more attic insulation this year... anyone else notice a big difference after doing that?

“I’m thinking about adding more attic insulation this year... anyone else notice a big difference after doing that?”

- Insulation definitely helps, but it’s not always the magic fix for ice dams - especially with older homes.
- I’ve seen cases where folks added a ton of insulation, but still had ice issues because of air leaks (think: gaps around light fixtures, attic hatches, plumbing vents). Warm air sneaks up and melts the snow from underneath, then it refreezes at the eaves.
- If you’re already scraping shingles with the rake, maybe look into a roof de-icing cable? Not the greenest solution, but it’s less risky for the roof than aggressive raking in deep cold.
- Another angle: check your roof ventilation. Sometimes just adding a ridge vent or more soffit vents can make a bigger difference than insulation alone.
- Personally, I went with dense-pack cellulose plus air sealing, and saw a bigger drop in ice dams than when I just added batts.

Insulation’s good, but it’s only part of the puzzle. If you’re still seeing ice after beefing it up, might be worth poking around for hidden leaks or airflow issues.

I used to think just piling on more insulation would be the magic bullet, but turns out my old Cape Cod had other ideas. First winter after I added a bunch of fiberglass batts, I still got those lovely ice dams - just a little less dramatic. What finally made a difference was crawling around up there with a can of spray foam and some caulk, sealing up every weird gap and hole I could find. The attic hatch was a big culprit, and so were the spots around the bathroom fan.

I totally agree about ventilation. Before I added more soffit vents, the attic felt like a sauna after a sunny day, even in January. Once I got the airflow sorted, the snow stopped melting in weird patches. Haven’t needed to use the roof rake nearly as much since then, which is good because I’m not exactly graceful on a ladder.

De-icing cables are kind of a last resort for me. I put them on the north side where the sun never hits, but honestly, they’re a pain to install and not cheap to run. Still beats chipping away at ice with a shovel, though.

One thing I’d add - if you’ve got recessed lights in the ceiling below the attic, those things are basically little chimneys for warm air unless they’re rated for insulation contact. Swapping mine out made a bigger difference than I expected.

Every house seems to have its own quirks. For me, it was a combo of plugging leaks, boosting insulation, and getting the air moving. Not perfect, but at least my gutters aren’t turning into mini glaciers anymore...

I’m with you on the recessed lights - those things are sneaky. I thought I’d done a decent job with insulation and air sealing, but the first time I checked with a thermal camera, it was like a light show around every can light and attic hatch. Swapping them out for IC-rated LEDs made a noticeable difference, but honestly, I still get minor ice dams on the west side after a heavy snow and freeze-thaw cycle. Has anyone tried those rigid foam attic hatch covers? I’ve seen mixed reviews and wonder if they’re actually worth the effort, or just another thing to trip over up there...

Has anyone tried those rigid foam attic hatch covers? I’ve seen mixed reviews and wonder if they’re actually worth the effort, or just another thing to trip over up there...

I’ve put in a few of those rigid foam covers for clients, and honestly, they do help - if you install them right. The trick is making sure you get a good seal around the hatch perimeter. If there’s even a small gap, warm air will still sneak through and you’ll end up with the same ice dam issues. I usually add some weatherstripping around the edge, then set the cover on top. It’s not a miracle fix, but it does cut down on heat loss.

One thing to watch for: if your attic is tight on space, those covers can be a pain to maneuver around. I’ve tripped over more than one... but I’d say the trade-off is worth it if you’re still seeing ice dams after upgrading lights and insulation. Just double-check your attic ventilation too - sometimes that’s the missing piece people overlook. If warm air’s got nowhere to go, it’ll keep melting snow no matter how well you seal things up.

Tried those foam covers a couple times - mixed bag, honestly. They do help with drafts if you get them snug, but I’ve seen folks slap them on and still end up with ice dams because the rest of the attic’s leaking heat somewhere else. One job, we found the real culprit was a bathroom fan venting straight into the attic... not the hatch at all. If you’re already crawling around up there, might as well check for other gaps or bad insulation while you’re at it. The covers aren’t magic, but they’re not useless either. Just don’t expect miracles if the rest of the attic’s a mess.

I’ve wondered the same thing about those foam covers - picked one up on sale last winter and it helped a bit, but honestly, I still felt a cold draft near the attic stairs. Ended up finding a gap around an old light fixture up there that was leaking warm air. Anyone else find those little spots make a bigger difference than the hatch itself? I’m always torn between patching what I see and wondering what I’m missing.

Funny, I had the exact same experience last year - spent a weekend fussing with one of those foam covers, thinking it’d solve everything. It helped, but not as much as I hoped. Turns out, the real issue was a couple of tiny gaps around some old wiring up there. I’d never have noticed if I wasn’t crawling around with a flashlight.

Here’s how I tackled it: first, I checked for obvious drafts around the hatch and sealed those up with weatherstripping. Then, I went hunting for less obvious leaks - light fixtures, wiring holes, even some random nail pops that left little gaps. Used a combo of spray foam and caulk depending on the size. Honestly, sealing just those few spots seemed to make more difference than the big foam cover did.

I get what you mean about wondering what you’re missing though. Sometimes I feel like I’m playing whack-a-mole with air leaks... Patch one spot and another pops up somewhere else. But in my case, dealing with the little stuff added up way faster than just focusing on the hatch alone.

That’s the thing - everyone thinks it’s the obvious big gaps, but it’s those sneaky little holes that really let the cold in. I once found a draft coming right through a tiny staple hole, no joke. I’ve crawled more attics than I care to admit and it’s always something random - like a wire poking through insulation, or a vent that’s not quite sealed. Patch those, and suddenly the ice dams aren’t nearly as bad. Still, I swear the house tries to invent new leaks every winter... it’s like some kind of weird game.

I get what you’re saying about the little gaps, but honestly, I’m not sure that’s always the main culprit. I mean, yeah, I found a draft coming through a cable hole last year and it was wild how much cold air got in, but for me the bigger issue was actually my attic insulation just being super patchy in general. Like, there were whole sections where it was way thinner than it should’ve been - guess whoever did it before just kind of gave up halfway through? Once I beefed that up, the ice dams dropped off way more than when I was chasing every tiny crack.

Not saying the small stuff doesn’t matter (I still go after those when I spot ‘em), but sometimes it feels like the bigger picture gets missed. Maybe it’s different depending on the house or climate? Mine’s an old place with a low-pitch roof and we get hammered with snow here, so maybe that’s part of it. Either way, I feel like every winter is a new adventure in “what did I miss this time…”

I’ve seen way too many folks obsess over every tiny air leak and totally miss the big insulation gaps, just like you said. In my experience, patchy attic insulation is usually the main villain, especially in older homes with weird roof lines or low pitches. I once inspected a place where the homeowner had sealed every crack but still had monster ice dams - turned out half the attic was basically bare. After fixing that, problem mostly solved. Still, I’d say both matter, but if you’ve got to pick your battles, start with the obvious weak spots.

I’ve seen way too many folks obsess over every tiny air leak and totally miss the big insulation gaps, just like you said.

That’s honestly been my experience too. I manage a bunch of older duplexes, and every winter it’s the same story - tenants crank the heat, then call about icicles hanging off the gutters. First time it happened, I spent hours crawling around with a can of spray foam, sealing up every little gap I could find. Didn’t make much difference. Next year, finally got up in the attic and realized there were spots where you could literally see the drywall through what was left of the old insulation. No wonder we had ice dams.

I get why people focus on air leaks - it feels like something you can actually fix yourself without tearing stuff apart. But if your insulation is patchy or missing in spots, you’re basically heating your roof instead of your house. In my case, after topping up the attic with blown-in cellulose (not cheap, but worth it), ice dam issues dropped off a cliff.

One thing I’d add: sometimes it’s not just about how much insulation you have, but how evenly it’s spread out. I’ve seen places where someone dumped a bunch in one corner and left other areas bare. Doesn’t help much if heat’s still escaping from those weak spots.

I will say though, air leaks aren’t totally nothing - especially around attic hatches or plumbing vents. But yeah, if you’re picking your battles, start with the big gaps first. The little stuff can wait until you’re not freezing your butt off in January.

Funny enough, one of my tenants swears by using roof rakes after every snowstorm to keep things clear near the eaves. Not a bad idea for short-term help, but definitely not a substitute for fixing what’s going on underneath.

Curious if anyone’s tried those heated cables? I’ve always wondered if they’re worth it or just masking a bigger problem...

Heated cables are kind of a mixed bag in my experience. I put some up a few years back on the north side where ice dams were relentless. They did help, but honestly, it felt like slapping a band-aid on a bigger wound. If you’ve got poor insulation or ventilation, the cables just mask the symptoms. Still, they’re better than nothing if you can’t fix the root cause right away. Just watch your electric bill - mine definitely noticed.

Heated cables remind me of when I tried patching a leaky boot with duct tape - worked for a bit, but my sock still got wet. I went down the green roof route a couple years back (sedum mats, mostly), and it’s been a game changer for ice dams. The insulation from the soil layer keeps the attic temps more stable, so less melting and refreezing. Not cheap upfront, but my power bill doesn’t flinch in winter anymore. Definitely not for everyone, but if you’re already thinking about a major roof overhaul, it’s worth a look.

Green roofs are interesting, but I’d be worried about the extra weight on older rafters. My place is a 1960s ranch with a low slope, so I stuck with beefing up attic insulation and sealing air leaks. Not as flashy, but it cut down on ice dams and didn’t require structural changes. The upfront cost was way less too. Green roofs look great, just not convinced they’re practical for every house, especially in heavy snow zones.

Green roofs look great, just not convinced they’re practical for every house, especially in heavy snow zones.

I hear you on that. My neighbor down the street tried to get all fancy with a green roof - looked like a chia pet exploded up there. It lasted until our first big snowstorm, then he spent the next weekend shoveling dirt and soggy sedum off his driveway. My roof’s an old-school low-pitch too, and I’m not about to tempt fate (or gravity).

I did the same as you - blew in a ton of cellulose, sealed up every weird attic gap I could find, and even swapped out some sketchy old vents. Not as Instagram-worthy as a rooftop garden, but my heating bills dropped and the icicles stopped looking like medieval weapons hanging off my gutters. Plus, didn’t have to bribe my cousin with pizza to help lug bags of soil onto the roof.

Guess sometimes boring wins. At least until someone figures out how to install a green roof that weighs less than my dog...

- Green roofs in snow country? Not a fan. Too much weight, too much mess if you get a thaw/freeze cycle.
- Low-pitch roofs are already tricky for snow load. Add soil and plants, and you’re just asking for trouble unless you’ve got serious structural upgrades.
- Cellulose insulation and air sealing - solid moves. Most ice damming I see is from heat loss, not lack of fancy roofing.
- If you want to go the extra mile, check your soffit and ridge vents. Blocked or undersized vents = trapped heat = more ice.
- I’ve seen folks try heat cables, but they’re a band-aid at best. Better than nothing if you’re desperate, but fixing insulation/venting is the real answer.
- For anyone with older homes: watch for hidden leaks after big melts. Water finds weird paths.
- Not as flashy as a green roof, but boring works. I’ll take a dry attic and safe gutters over Instagram likes any day.