It’s easy to do more harm than good.
That’s spot on. I’ve inspected plenty of roofs where a little DIY cleanup turned into cracked shingles or loose flashing. If you’re careful and know what you’re stepping on, light debris is manageable, but it doesn’t take much to cause issues you won’t notice until the next rain. Good call on skipping the pressure washer—seen way too many warped decks from that mistake.
Pressure washers on shingles are just asking for trouble, honestly. I tried it once on my old asphalt roof and ended up with a bunch of granules in the gutter and a couple of loose tabs. Lesson learned. I get the appeal of wanting to do it yourself—sometimes it feels like you’re saving money, but one slip and you’re looking at repairs that cost way more than a pro cleaning would’ve.
That said, I still do light sweeping with a soft broom if there’s just some leaves or pine needles up there. I’m careful to stay off the edges and avoid stepping on the same spot too much. My roof’s got a pretty gentle pitch, so it’s not too sketchy, but I wouldn’t mess with anything steeper or older. And yeah, flashing is sneaky—one wrong move and you won’t even know you’ve bent it until water starts showing up in the attic.
If you’re comfortable and know your roof, some DIY is fine, but I totally get why folks just call someone in. Not worth risking a leak over a few twigs.
Pressure washers on shingles are basically a fast track to a new roof, and not in a good way. I’ve seen folks blast away years off their shingles in about five minutes flat—makes for a great “before and after” photo, but the after is usually a mess of bald spots and loose tabs. Those granules aren’t just for show; they’re what keeps your roof from aging like milk in the sun.
Light sweeping with a soft broom is about as far as I’d go too, especially if you know your roof’s pitch and you’re not up there doing gymnastics. The real trouble starts when people get overconfident or try to tackle moss or algae with anything more aggressive than a gentle touch. I had a neighbor who tried to “save money” by pressure washing his own roof—ended up calling me two weeks later because his attic looked like Niagara Falls after the next rain.
Flashing is another sneaky culprit. It’s like the silent assassin of leaks. You think you’re just nudging it out of the way to get at some leaves, but next thing you know, water’s finding its way in places it shouldn’t be. And you won’t even notice until months later when you’re wondering why your ceiling looks like it’s got a weird birthmark.
I get wanting to DIY, especially if you’ve got a low slope and decent balance (or at least better balance than me after two cups of coffee). But for anything steep or if your shingles are already looking tired, it’s probably cheaper in the long run to let someone else risk their neck—and their insurance—up there.
One thing I’ll say: if you do go up there, check your shoes. I’ve seen more near-misses from folks wearing slick sneakers than I care to remember. And if you’re in an area with lots of pine needles or moss (hello, Pacific Northwest), sometimes those “roof rakes” with telescoping handles are worth every penny.
DIY can be fine if you know your limits and your roof isn’t already halfway to retirement... but yeah, sometimes paying for peace of mind is worth it.
