- Had the same issue—north side just never dries out, especially after a rainy week.
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Ridge vents helped a bit for me, but I still get some green patches.“I’m still curious if there’s a way to improve airflow up there without spending a fortune...”
- Ever tried trimming back trees or shrubs nearby? Made a surprising difference at my place. Wondering if you’ve got much shade up there?
I’ve been running into the same thing on the north side—just stays damp forever, especially after a stretch of rain. I tried adding a couple of box vents last fall, thinking it’d help with the airflow, but honestly, it only made a small difference. Ridge vents sound promising, but I’m not sure they’d be enough on their own in my case.
Trimming back trees actually helped more than I expected. We had a big maple shading that side, and after cutting back a few limbs, the roof started drying out a bit faster. Still, I get those stubborn green streaks. I’m not wild about using chemicals, but I did try one of those zinc strips near the ridge. It’s only been a few months, so I can’t say for sure if it’s working yet.
I’ve heard some folks swear by just keeping gutters super clean and making sure nothing’s holding moisture up there. For me, it’s been a mix of small changes rather than one magic fix. Curious if anyone’s had luck with those algae-resistant shingles? I went with regular Atlas ones, but maybe I should’ve sprung for the upgrade...
I’ve got Atlas shingles on my place too, and the north side is always a pain. I’m in the Midwest, so we get those long stretches of damp weather—doesn’t help at all. I tried the zinc strips a couple years back, and honestly, they did slow down the algae, but didn’t totally stop it. The green streaks still show up, just not as fast.
Cutting back trees made a bigger difference for me than any venting or chemical stuff. Once I took out a big overhanging limb, that side started drying out way quicker. I’m not big on using chemicals either—tried a “green” cleaner once and it barely touched the stains.
I looked into algae-resistant shingles when I had to replace part of the roof last year. The price jump was real, but my neighbor went for them and his roof looks cleaner than mine after two seasons. If I had to do it again, I’d probably pay extra for those just to save myself the hassle. Regular maintenance is still key though—gutters especially. It’s always a mix of things, never just one fix.
That’s interesting about the zinc strips not totally solving it—I’ve always wondered if those were worth the hassle. Did you notice any difference in how long the streaks took to come back, or was it just a minor slowdown? I’ve seen some folks swear by copper strips instead, but I’m not sure if that’s just marketing or if there’s a real difference.
Cutting back trees seems like a no-brainer, but I’ve had a few owners push back because they like the shade. Did you have any issues with the house getting hotter after you took down the limb? I’m always trying to balance keeping things dry with not turning the upstairs into an oven.
On the algae-resistant shingles—do you think they’re holding up better just because they’re newer, or is it really the material? I’ve seen some roofs look great for the first couple years no matter what, but then the streaks show up anyway. Maintenance is definitely a pain, especially with gutters. Ever tried gutter guards, or do you just clean them out the old-fashioned way?
I tried the zinc strips too and honestly, they slowed the algae down a bit but didn’t stop it. Maybe bought me an extra year before the streaks came back. I’ve heard copper’s supposed to work better, but I couldn’t justify the price difference for my little ranch. As for tree trimming, yeah, it made the upstairs warmer in summer—nothing crazy, but I did notice it. Ended up getting blackout curtains to help. Gutter guards? Tried those mesh ones and still had to clean out pine needles every fall... not sure they’re worth it unless you’ve got big leaves instead of needles.