Gotta push back a bit on the zinc and copper strip love. I’ve seen plenty of roofs with those strips, and you’d think they were made of moss fertilizer the way some patches still come back. Maybe they slow things down, but in my experience, if you’ve got big overhanging trees or north-facing slopes, nothing’s truly “set it and forget it.” The enzyme stuff is pretty gentle, yeah, but I’ve had a few clients swear by doing a solid manual scrape every couple years and just using the spray as maintenance—not a miracle cure.
Honestly, sometimes it feels like the only real long-term fix is to move to Arizona... or just accept moss as part of the roof’s personality. If you’re already up there, might as well check the flashing and gutters too—two birds, one sketchy ladder. For what it’s worth, I’ll take a little green fuzz over replacing rotten sheathing any day.
- Yeah, zinc and copper strips aren’t magic, especially under heavy tree cover. I’ve seen moss just scoot around those things like it’s nothing.
- Manual scraping every couple years works for me, too. I usually follow up with a mild enzyme spray—just helps slow the regrowth.
- North-facing roofs are always a pain. Honestly, trimming back nearby branches made more difference than anything else I tried.
- I kinda like the “roof personality” idea... as long as it’s not eating into the shingles or causing leaks. Gotta pick your battles, right?
- While you’re up there, double-checking gutters and flashing is smart. One sketchy climb, but worth it if you’re already hauling up tools.
North-facing roofs are always a pain. Honestly, trimming back nearby branches made more difference than anything else I tried.
I can vouch for that—my place is surrounded by maples and pines, and the north slope just stays damp all year. When I first moved in, I figured I’d just slap some of those zinc strips up there and call it good. Didn’t do squat. Moss kept creeping back, even seemed to get bolder? Ended up spending most of a Saturday with a stiff brush and a lot of elbow grease.
I tried hiring someone once, since the roof’s got a pretty steep pitch and my knees aren’t what they used to be. They did an okay job, but honestly, they missed a bunch along the gutter line and charged more than I'd expected. Now I just do it myself every other spring, especially after pollen season is done—otherwise it’s like scrubbing off green mud.
One thing that caught me off guard was how much difference branch trimming made. After we took down a couple limbs that were almost touching the roof (and dropping needles everywhere), things dried out way faster. Moss slowed down noticeably, and even my gutters stayed cleaner.
I hear folks say “just let the moss be” sometimes, but on my asphalt shingles it started lifting the edges after a couple years. Not worth risking leaks just for some character up top.
As for checking flashing and gutters while you’re up there—totally agree it’s smart if you’re already hauling tools around. I found a loose shingle last time that probably would’ve led to trouble this winter if I hadn’t spotted it.
If you’ve got the time (and aren’t terrified of heights), doing it yourself isn’t all bad... but man, some days I wish I'd gone for a smaller house with less roof to babysit.
- North slopes are always trouble, especially with big trees nearby. Shade and needles just keep things damp—prime spot for moss and rot.
- Zinc strips can help, but only if there’s enough rain to wash the runoff down the whole slope. In my area (lots of dry spells), they barely made a dent.
- Manual scrubbing works, but watch out for shingle damage. I’ve seen folks go too hard and end up with granules in the gutters.
- Branch trimming is underrated. More sun and airflow = less moss, less ice, fewer headaches after storms. Had a client skip this step and ended up with a limb through their roof after a windstorm... not fun.
- Moss on asphalt isn’t just cosmetic. Like you said, it can lift shingles and make a mess of your underlayment. Insurance adjusters love to call that “lack of maintenance” if you ever need to file a claim.
- DIY is fine if you’re steady on a ladder and know your limits. Steep pitch or second story? Sometimes it’s worth paying for pros with harnesses, even if they miss a spot or two.
- Always check flashing and vents while you’re up there. One loose boot can cause more damage than all the moss combined.
- Gutters—if you’re already up there, might as well clear them out. Clogged gutters + heavy rain = water backing up under shingles. Seen it too many times.
Bottom line: whatever route you pick, regular checks beat waiting for leaks every time.
You nailed a lot of the stuff I see folks overlook. North slopes are like a science experiment for rot—especially if you’ve got maples or pines dropping needles all year. I’ve lost count of how many times I’ve pointed out moss to a homeowner who thought it was just “a little green.” Next thing you know, there’s soft decking and a leak right over the dining room table.
I’m with you on zinc strips being hit-or-miss. Around here (PNW), they help, but only if you get steady rain. Dry spells? Moss just laughs at those strips.
Manual scrubbing... yeah, that’s where people get into trouble. Saw a guy using a wire brush once—shingles looked like they’d been through a cheese grater. And gutters—don’t get me started. Clogged ones are like an open invitation for water to sneak in behind the fascia.
I’ll add: even if you hire pros, check their work. I’ve seen “finished” jobs where they missed whole patches behind chimneys or under overhangs. Regular checks, like you said, save way more money than waiting for the ceiling stains to show up.