That green fuzz really does have a mind of its own, doesn’t it? I’m in pretty much the same boat—low slope, tons of shade, and moss just keeps coming back no matter how many times I sweep or scrub. I tried skipping chemicals for a year and regretted it too. The zinc strip thing is funny; it’s like the moss just laughs at it unless there’s a heavy rain. I finally settled on treating the worst patches once a year and just accepting some green up there. Honestly, unless you’re up for climbing around every other month, it’s kind of a losing battle. At least you’re not alone.
The zinc strip thing is funny; it’s like the moss just laughs at it unless there’s a heavy rain.
That’s exactly how it feels—like the moss is running its own comedy show up there. I tried the “DIY warrior” route last year, armed with a broom and a spray bottle of vinegar. Ended up with sore arms and a roof that looked... slightly less green for about a week. I’m too cheap to hire a pro unless things get really out of hand, so now I just hit the worst spots every spring and call it good. If you’re not afraid of heights and don’t mind getting dirty, DIY saves cash, but honestly, sometimes I wonder if the moss is winning on points.
I tried the “DIY warrior” route last year, armed with a broom and a spray bottle of vinegar. Ended up with sore arms and a roof that looked... slightly less green for about a week.
I hear you on the “slightly less green” outcome. Vinegar and elbow grease only go so far, especially if you’ve got north-facing slopes or big trees nearby. Here’s the thing—DIY saves money upfront, but I’ve seen plenty of folks accidentally damage shingles or even void their warranties by scrubbing too hard or using harsh stuff. If it’s just a little moss, spot cleaning each spring like you’re doing is fine, but once it starts creeping under shingles or gets thick, that’s when leaks and rot can sneak up.
I’m not wild about zinc strips either—they help, but only if installed high enough and maintained. And yeah, rain matters. If you’re set on DIY, soft wash solutions (the kind made for roofs) do a better job than vinegar and won’t wreck your shingles. Just don’t use a pressure washer unless you really want to buy a new roof sooner than later. In my experience, pro cleaning every few years is worth it if you want to keep the roof in shape long-term, especially with older shingles or heavy moss zones. But I get it—sometimes the moss wins a few rounds before you call in backup.
Funny, I had a client last fall who tried to “scrape the moss off” with a garden hoe—ended up with a pile of shingle granules in his gutters and a bunch of exposed nail heads. Ever notice if your moss comes back faster after cleaning, or does it slow down for a bit? Climate seems to make a huge difference.
I’ve actually seen moss come back even quicker after a rough scrape—almost like it gets “pruned” and grows back thicker. Especially in the damp PNW, it’s relentless. Gentle chemical treatments seem to slow the return way more than just scraping.
