I get the frustration with zinc strips under heavy shade. But have you tried copper instead? It’s pricier, but I found it works a bit better, even under my big oak. I also started using a long-handled brush instead of hauling out the ladder every time—saves my knees, at least for the first round of cleaning. Curious if anyone’s had luck with those roof-safe cleaners they sell at hardware stores... I’m skeptical about spraying chemicals up there, but maybe I’m missing something.
Curious if anyone’s had luck with those roof-safe cleaners they sell at hardware stores... I’m skeptical about spraying chemicals up there, but maybe I’m missing something.
I’ve been down the “roof-safe cleaner” road a couple times. Honestly, mixed results. Tried one of those spray-on things last spring—can’t remember the brand, but it had a picture of a sparkling roof on the jug (don’t they all?). The algae faded a bit after a few rains, but I still had those stubborn dark streaks under the maple tree. Maybe it’d work better somewhere sunnier, but in deep shade, it felt like money down the drain.
Copper strips have definitely outperformed zinc for me too, though I grumbled about the price when I first put them up. The upfront cost stings, but after two wet summers, my north-facing slope is still looking pretty clean. Under the big pine, though? Nothing seems to work long-term except regular brushing.
I hear you about ladders—my knees aren’t what they used to be either. The long-handled brush is a game-changer for light maintenance. If you’re dealing with heavy buildup or moss, though, I still end up on the roof once or twice a year. Just can’t seem to avoid it.
As for chemicals, my main worry is what runs off into the yard and garden beds. Some of those “eco-friendly” labels are kind of meaningless if you dig into the ingredients. Plus, I always wonder how much actually stays on the shingles versus just washing away in the next rainstorm.
If you’re tempted to try one, maybe test it on a small patch first? That’s what I did—less risk if it discolors or doesn’t do much. But honestly, for heavy shade and big trees overhead, copper plus elbow grease has been my only real solution so far.
Would love to hear if anyone’s found something easier that actually lasts more than a season...
Totally agree on the copper strips—pricey, but they actually do something besides lighten your wallet. I’ve seen those “just spray and forget” cleaners in action and honestly, they’re about as effective as hoping the algae just gets bored and leaves. Plus, half the time you’re just feeding your garden a weird chemical soup. Long-handled brush and a stubborn attitude have been my go-to, though I’d pay good money for something that works while I sit inside with coffee. Maybe someday...
Long-handled brush and a stubborn attitude have been my go-to, though I’d pay good money for something that works while I sit inside with coffee. Maybe someday...
Yeah, I hear you on the “stubborn attitude” part. I’ve spent more Saturday mornings than I care to admit up on a slippery roof, scrubbing away like I’m auditioning for some weird reality show. Tried those spray cleaners once—just ended up with streaky shingles and a patch of dead grass. Copper strips are the only thing that’s really made a dent, but man, they’re not cheap. If someone ever invents a self-cleaning shingle, I’ll be first in line... right after I finish my coffee.
Copper strips really are the only thing I’ve seen make a difference long-term, but yeah, the price stings. I’ve tried every “miracle” spray and cleaner out there—most just left me with a mess and a sore back. At least you’re not alone in the coffee-and-wishful-thinking club. Honestly, sometimes I wonder if these shingle companies bank on us giving up and just replacing the whole roof... but stubbornness does have its perks.