“they do slow down the algae, but don’t expect a miracle. In the shadiest spots, I still get some streaks after a few years.”
That lines up with what I’ve seen. I put copper strips along the ridge a while back, thinking it’d be a game changer, but honestly, the lower sections in deep shade still get those dark streaks after a couple seasons. Maybe it’s just our humid summers here? I’m curious if anyone’s tried periodic gentle washing or if that just wears out the shingles faster. The cost for copper-infused stuff adds up, and I’m not convinced it’s worth it unless you’re really bothered by the look.
“the lower sections in deep shade still get those dark streaks after a couple seasons.”
Same deal here. I tried the copper strip trick and honestly, it’s just not a silver bullet, especially with all the trees around my place. I did a gentle wash one spring—low pressure, nothing harsh—and didn’t notice any shingle wear, but it’s a hassle and the streaks creep back anyway. For me, the cost of copper or zinc isn’t justified unless you’re really picky about roof appearance. I’d rather put that money toward better ventilation or trimming back branches.
For me, the cost of copper or zinc isn’t justified unless you’re really picky about roof appearance.
Yeah, I get that. I’m in a spot with a ton of maples overhead, so even after trimming, shade’s just part of life. Has anyone tried those algae-resistant shingles? Wondering if they actually hold up or if it’s just marketing.
I’ve seen a lot of those algae-resistant shingles on inspections, especially in shaded spots like you’re describing. They do help, but honestly, after 7-10 years, you’ll usually see some streaking anyway. The copper granules slow it down, but nothing’s totally maintenance-free under heavy trees. I’d say they’re better than standard shingles, just don’t expect miracles.
That’s a fair take—algae-resistant shingles are definitely an improvement, but I’ve yet to see any product that holds up perfectly under dense tree cover for more than a decade. The copper granules do buy you some time, though. I’ve seen roofs in heavy shade where the streaking was way less severe compared to standard shingles. Still, even with the best materials, some maintenance is just part of the deal if you want things looking sharp. If your hack is working, that’s a win in my book.