Copper strips are effective but, yeah, the cost adds up quick on larger roofs.
I hear you on the copper strips—they’re pricey, especially if you’ve got a big roof. Have you tried using zinc strips instead? They’re not quite as long-lasting as copper, but they’re way more budget-friendly and still help slow down algae growth. I usually install them just below the ridge cap and let rainwater do the work. It’s not a total fix, but it’s stretched out my cleaning schedule by months. Worth a shot if you’re looking to cut costs.
I actually tried zinc strips last fall, but honestly didn’t notice a huge difference. Maybe my roof’s pitch or the amount of shade messes with it? I ended up just spot-treating with a hose and cleaner. Not ideal, but cheaper for now.
I hear you on the zinc strips not doing much. I tried them on my north-facing side, and with all the tree cover, they barely made a dent. What’s worked for me is hitting the worst spots with a cheap sprayer and some diluted bleach mix, then rinsing it off. Not perfect, but it stretches out the time between big cleanings. Just gotta be careful not to overdo it near the plants around the house... learned that the hard way.
Keeping Algae Off Atlas Shingles: My Quick Hack
That’s pretty much the routine I’ve landed on too. Zinc strips are hit or miss, especially with heavy shade—trees just make it worse. I usually go with a pump sprayer, mix up a mild bleach solution, and spot treat the worst patches. Always rinse well, and yeah, learned the hard way about keeping it away from the flower beds... lost a couple hostas last year. It’s not perfect, but it buys you time between full-on cleanings. Just gotta keep an eye on the runoff.
Yeah, I’ve done the bleach thing too—works alright if you’re careful. I tried those copper strips once, but honestly didn’t see much difference, especially with all the trees around. Biggest headache for me is the overspray... fried some ferns last spring. Just part of the game, I guess.