Clearing roof mess: DIY or hire a pro?

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.

Couldn’t agree more with this. I’ve lost count of how many times I’ve been called out to “fix” a roof that was supposedly just cleaned or repaired. Folks get a false sense of security because someone with a ladder showed up, but those hidden spots - like behind vents or under eaves - are where the real trouble starts.

And yeah, the north slopes are brutal. Around here (I’m in western Oregon), moss is basically a given if you don’t stay on top of it. I actually had a client last year who thought the green fuzz was “kind of pretty.” Fast forward six months, and she’s got decking so soft you could poke a finger through it.

One thing I’ll add: if you’re going DIY, use a soft brush and skip the pressure washer. It’s tempting, but it’ll do more harm than good on asphalt shingles. And always check your gutters after storms - clogged downspouts are sneaky.

You’re spot-on about regular checks being worth it. A quick look every few months beats an emergency call any day.

That’s a solid point about not just trusting the “pros” blindly. I’ve seen it too - jobs that look finished at first glance, but then you get up there and find debris tucked behind a vent or a patch of moss hiding under an overhang. Those are the spots that end up costing homeowners big time down the line.

The north-facing slopes are always the worst here as well (I’m in the Midwest), especially after a wet spring. Moss, algae, you name it...it just thrives if you’re not on top of things. I’ve inspected roofs where folks thought they were in good shape because everything looked fine from the driveway, but then you spot those soft spots or see granule loss up close and it’s a different story.

Really appreciate your reminder about pressure washers - people don’t realize how much damage high pressure can do to shingles. It’s tempting to go for speed, but gentle cleaning is worth the extra time. And yeah, keeping gutters clear is huge. Funny how many leaks end up being traced back to something as simple as a clogged downspout.

You’re right - regular checks save money and headaches. It’s one of those little habits that pays off way more than people expect.

- 100% agree on not just trusting the “pros” to get it all. I’ve seen plenty of “finished” jobs where you lift a shingle and find a whole science experiment going on underneath.
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Funny how many leaks end up being traced back to something as simple as a clogged downspout.

Clearing out gutters and checking the roof is one of those things I always tell folks not to put off, but I get why people do. I’ve lost count of how many times I’ve been called out for a “mystery leak” and it turns out to be a bird’s nest or a wad of leaves jammed in the downspout. People are usually convinced it’s something major, but half the time it’s just water sneaking in where it shouldn’t because of a simple clog.

I’m with you on the north-facing slopes - here in central PA, they’re always the first to get that green fuzz. Had a client last fall who thought their shingles were “just dirty,” but when I got up there, it was like a moss carpet. Once that stuff gets under the edges, it’s game over for those shingles. The pressure washer thing makes me wince too. Saw a neighbor go at his roof with one last spring... now he’s got bare spots and his warranty’s probably toast.

Chimneys and skylights are sneaky troublemakers. Did an inspection on a house that looked spotless from the ground, but up top there was a pile of pine needles wedged behind the chimney flashing. Underneath? Wood rot city. The owner had no idea - said he paid for annual “pro” cleanings, but clearly nobody was getting up close.

DIY is great if you’re steady on your feet and know what to look for, but honestly, even I get nervous on some of these steep old farmhouses. One slip and you’re in for more than just a wet ceiling. Sometimes paying someone who actually takes their time (and has insurance) is worth every penny.

Regular checks really do save headaches down the line. Had one guy who spent $75 on gutter cleaning every spring and fall - never had a single leak or ice dam issue in 20 years. Meanwhile, his neighbor skipped it for two seasons and ended up with water pouring into his living room during a thaw.

Long story short: whether you DIY or hire out, don’t skip the basics. And if you see green up there, don’t wait until next year to deal with it...

- Totally agree about not skipping the basics - those “mystery leaks” are almost always something simple like a clogged gutter or a pile of debris.
- I’ve seen moss eat through shingles way faster than folks expect. Once it’s under the edges, you’re looking at repairs, not just cleaning.
- Pressure washers on roofs make me cringe too. They do more harm than good most of the time.
- I always tell people: if you’re not comfortable on a ladder or your roof’s steep, just hire it out. The cost is nothing compared to a hospital bill or major water damage.
- Quick tip: after storms, check around chimneys and skylights for debris. That’s where I find most hidden issues, especially on older homes.
- Regular cleanings might feel like a chore, but they really do save money (and headaches) in the long run.

I’ve been helping out on some pretty steep roofs lately, and honestly, I get why people say to leave it to the pros if you’re not comfortable. One homeowner insisted on cleaning his own roof after a storm and ended up slipping - luckily just a bruised ego, but it could’ve been worse. I’m still surprised how often moss gets overlooked, too. The first time I saw shingles curling from underneath, I thought it was just age, but it was all moss damage. I get wanting to save money, but sometimes it’s just not worth the risk or extra repairs down the line.

That moss issue is sneaky, right? I’ve seen folks blame shingle curling on “old age” too, when really it’s just years of damp moss eating away underneath. I get the urge to DIY - especially after a storm when you want to check for damage ASAP - but man, those steep pitches are no joke. I’ve lost count of the number of times I’ve had to remind people that wet moss is basically ice.

One thing I’ve noticed: some homeowners think pressure washing is a quick fix for moss, but it can actually wreck the shingles if you’re not careful. Anyone else run into that? Or maybe found a safer way to handle moss without risking your neck or your roof? I’m always curious if there’s a middle ground between full-on pro service and risky DIY... especially for folks with lower slopes or single-story homes.

One thing I’ve noticed: some homeowners think pressure washing is a quick fix for moss, but it can actually wreck the shingles if you’re not careful.

Yeah, I totally get the temptation to just blast it off, but I’ve read too many horror stories about folks ruining their roofs that way. I’m in the same boat - first house, low-ish slope, and I keep wondering if there’s a safe DIY method that doesn’t involve climbing up there with a hose or harsh chemicals. Has anyone tried those moss-killer powders you sprinkle on from a ladder? I’m skeptical they actually work, but I’d rather try something like that than risk slipping.

Has anyone tried those moss-killer powders you sprinkle on from a ladder? I’m skeptical they actually work, but I’d rather try something like that than risk slipping.

Tried the powder thing a couple years back on my old asphalt shingle roof. Honestly, it was a mixed bag. Sprinkled it on during a dry spell (which the instructions said was fine), but then we got rain two days later and most of it just washed off before it could do much. The patches that stuck around did eventually turn the moss brown, but it took weeks and didn’t really clear it all. Maybe it works better if you get the timing just right, but it’s definitely not instant gratification.

I get the appeal, though - no way am I climbing up there with a hose. My neighbor went the pressure washer route and ended up with half his granules in the gutter and a patchy roof. Looked clean for about a month, then the moss came back anyway. Not worth the risk, in my book.

If you’re set on DIY, I’ve heard some folks swear by a 50/50 mix of vinegar and water in a pump sprayer, but you still have to get up there (which is a dealbreaker for me). Plus, if you’ve got plants around your house, that runoff can do a number on them. I’ve also heard copper strips along the ridge can help prevent moss from coming back, but they’re more of a long-term thing.

Honestly, after messing with powders and sprays, I just budgeted for a pro every few years. Not cheap, but beats a hospital bill or a ruined roof. Sometimes paying someone who knows what they’re doing is just less stress overall. If you do go the powder route, maybe pick a dry stretch and keep expectations low - at least you won’t be risking your neck.

I tried the powder last fall, hoping for an easy win, but honestly it was kind of underwhelming. Maybe I got impatient, but after a couple weeks the moss just looked sad and brown, not actually gone. Plus, half of it washed off in the first rain. I’m not wild about ladders either, so I get wanting to avoid anything risky. My neighbor swears by the copper strips, though - he put them up a few years ago and his roof looks way better than mine now. If I ever get brave enough to get up there again, that’s probably what I’ll try next.

Copper strips are like the secret weapon nobody tells you about until you’ve already spent too much on powders and sprays. I tried the powder route a couple years back - same deal, it just made the moss look depressed, not dead. And then it rained, and suddenly my gutters were full of expensive sludge. Not my proudest DIY moment.

I get the ladder thing, though. I’m not exactly Spiderman myself, and the idea of hauling copper up there is... well, let’s just say I’d rather be watching someone else do it. But honestly, once those strips are up, they do most of the work for you. Every time it rains, a little bit of copper washes down and keeps the moss at bay. My neighbor’s roof is proof - his shingles look like they’re on a magazine cover, while mine’s got that “before” photo vibe.

If you’re not wild about heights, maybe see if you can bribe a handy friend with pizza or something. Or, if you’re feeling flush, hire a pro just for the strip install. It’s a one-and-done kind of thing, unlike the endless cycle of powders and sprays. Plus, you won’t have to keep climbing up there every season.

One thing, though - if your roof’s super steep or you’ve got a weird pitch, copper strips can be a pain to install. I’ve heard some folks use zinc strips instead, but copper seems to last longer in our rainy climate (I’m in the Pacific Northwest, where moss is basically a roof accessory).

Anyway, if you do go for it, just make sure you don’t skimp on the length. Short strips only protect a narrow band, so you want to run them as close to the ridge as possible. Otherwise, you’ll end up with a stripe of clean roof and the rest still looking like a chia pet.

Hope that helps. If nothing else, at least you’ll have a good story for the next neighborhood BBQ...

Copper strips definitely help, but I’ve seen plenty of roofs where they only slow down the moss, not stop it. Especially if you’ve already got a thick layer growing - copper won’t magically clear that out overnight. I’ve had customers swear by pressure washing first (carefully, so you don’t blast off shingles), then putting up the strips. Also, if your roof’s older or has storm damage, sometimes the strips just highlight all the other problems - like leaks or loose shingles. Sometimes hiring a pro for a full inspection before messing with anything is worth it, especially after a rough winter.

Sometimes hiring a pro for a full inspection before messing with anything is worth it, especially after a rough winter.

Couldn’t agree more with this. I tried the DIY route last year - thought I’d save a few bucks and just slap some copper strips up there. Turns out, moss is way more stubborn than I gave it credit for. The strips helped, but the thick patches just laughed at me. Ended up on the roof with a garden sprayer and a stiff brush, which was... let’s just say, not my finest hour.

Pressure washing does work if you’re careful, but I’ve seen neighbors take off half their shingles trying to get things spotless. If your roof’s already seen better days, sometimes you find more problems than you started with. That’s when I wish I’d just called someone in the first place.

DIY is fine if you’re comfortable on a ladder and your roof isn’t ancient, but after a rough winter? Sometimes it’s worth paying for peace of mind - and keeping your dignity intact when the neighbors are watching.

Pressure washing does work if you’re careful, but I’ve seen neighbors take off half their shingles trying to get things spotless.

That’s the part that always makes me cringe. I’ve patched up more than a few roofs where someone got a little too enthusiastic with the pressure washer. Moss and algae are stubborn, but sometimes the cure is worse than the problem. After a rough winter, I’d rather pay for a pro to spot hidden damage than risk making things worse myself. Not saying DIY is never worth it, but sometimes it’s just not worth the gamble.

sometimes the cure is worse than the problem

That’s exactly what happened when I tried to blast moss off my old asphalt roof. Thought I was being gentle, but still managed to rough up a few shingles. Honestly, it made me rethink the whole DIY thing - especially since I’m in the rainy Northwest and moss just comes back anyway. These days, I lean toward using a soft brush or eco-friendly cleaner instead of risking damage. Sometimes less is more, especially with older roofs.

Thought I was being gentle, but still managed to rough up a few shingles.

That’s the risk, especially with older asphalt. I tried a pressure washer once - never again. Did you notice any warranty issues after using cleaners? Some manufacturers are picky about what you put on the roof.

I tried a pressure washer once - never again.

Same here. I figured renting a pressure washer would save me money, but it just tore up the edges of a few shingles and made a mess. My roof’s about 18 years old, so I probably should’ve known better. I checked the warranty after, and turns out using harsh cleaners or pressure washers can void it - wish I’d read the fine print first. Now I just use a garden sprayer with diluted cleaner and a soft brush, working in small sections. Takes longer, but at least I’m not risking more damage.

That’s pretty much what I do now too - slow and steady with the sprayer and brush. I’ve got a couple rental properties, and honestly, the pressure washer just isn’t worth the risk, especially on older shingles. Have you ever tried any of those “no scrub” roof cleaners? I’m always skeptical about whether they actually work or just make things look better for a few weeks.

I hear you on the pressure washer - on old asphalt shingles, it’s just asking for trouble. I’ve seen some guys blast away granules without even realizing it, and then you’re looking at a much bigger headache down the line.

About those “no scrub” cleaners... I get where you’re coming from with the skepticism.

“I’m always skeptical about whether they actually work or just make things look better for a few weeks.”

Honestly, slow and steady with a brush and gentle cleaner is still the safest bet for old roofs. It’s not glamorous, but at least you know you’re not doing any hidden damage. Plus, you actually see what’s going on up there, which can help you spot early signs of trouble. I wouldn’t trust anything that promises “no effort” results on something as finicky as roof shingles. If it sounds too easy, it probably is.

I get where you’re coming from on the “no scrub” stuff. I’ve tried a couple of those spray-and-leave products on my own roof, and honestly, they did make things look a little better for a month or two. But like you said, the moss and algae just came right back. It’s kind of like sweeping dirt under the rug - looks fine until you actually check under there.

“If it sounds too easy, it probably is.”

That really sums it up. I’ve had the best luck with a soft brush and a diluted cleaner, just working in small sections. It’s not fast, but at least I know I’m not taking years off my shingles. My place is in the Pacific Northwest, so moss is a constant battle. The only thing that’s really helped long-term is keeping the roof clear of debris and trimming back overhanging branches to let more sun hit the roof. Not a quick fix, but it slows down the green stuff.

I do get why people want to avoid climbing up there, though. If you’re not comfortable with heights or your roof is steep, sometimes it’s just safer to hire someone. But if you’re handy and careful, DIY can be totally doable - and you get a good look at what’s going on up there. I’ve caught a couple of cracked shingles and a loose flashing that way, which saved me bigger repairs down the line.

Anyway, you’re not alone in being skeptical about shortcuts. Sometimes the old-fashioned way is just less risky, especially with older roofs. Good luck if you decide to tackle it yourself - just take your time and don’t rush it.