Roof Cleaning in Riverdale, NJ
Low-pressure soft wash that lifts black streaks, moss & algae without touching your shingles.
Roof Cleaning in Riverdale, NJ
If you've driven up Hamburg Turnpike or through the neighborhoods off Newark-Pompton Turnpike, you've seen it: those dark streaks running down otherwise decent asphalt shingle roofs. That's not dirt and it's not permanent damage yet. It's *Gloeocapsa magma*, a hardy algae that thrives on the humidity we get sitting between the Pequannock River and the Ramapo foothills. Plenty of Riverdale homes, especially the older Capes and split-levels near Riverdale Elementary, show it worst on the north-facing slopes that never fully dry out.
We're Gallo Bros, a family-run exterior cleaning outfit working right here in North Jersey. For roofs we use a **soft wash** approach, not high pressure. Blasting a shingle roof strips the protective granules and voids most manufacturer warranties. Instead we apply a low-pressure treatment that kills the algae, moss, and lichen at the root so the streaks rinse and fade out without us ever standing up there grinding away at your shingles.
Riverdale's tree cover is a big factor too. Shaded lots along the wooded borough sections hold moisture and drop debris, which feeds moss on the shingles and clogs gutters. We handle both, and we'll tell you straight what your roof actually needs.
- Local crew that knows Riverdale homes
- Soft-wash & low-pressure methods that protect your surfaces
- Licensed, insured & background-checked
- Upfront pricing — same-week scheduling
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What neighbors say
5.0 · 854+ Google reviews“Absolutely outstanding job by the Galo Brothers today power washing our house! Honestly the best power washing job we have ever had done. The house looks brand new again, every detail was handled with care, and the difference is unbelievable. They were professional, thorough, hardworking, and took real pride in their work. It’s rare these days to find a company that exceeds expectations, but they absolutely did. Highly, highly recommend the Galo Brothers to anyone looking for top notch service and incredible results!”
Bruce Bosland
“Gallo Bros powerwashing team headed up by Joe, did a great job on our exposed, lakefront home. They went above and beyond to remove dirt and mildew from our house siding, soffits and multiple bluestone patios and walkways, as well as our dock and wood furniture. They also took great care to avoid or work around multiple bird nests which had recently hatched babies pre fledge. I will definitely call them in the future!”
Cathy Marshall
“We hired Gallo Bros Power Washing to power wash, re-sand and seal our 20 year old paver patio and front walk. They also performed a few repairs and reset a few areas that needed attention. We had never had this done professionally before. From the beginning estimating phase to the final coat of sealer, we were very happy with the services provided, the price and the final result, which they also warrantee for 1 year. I highly recommend Gallo Bros. Power Washing and will use them for other services in the future.”
Andrew O
Roof Cleaning in Riverdale — FAQ
Do you pressure wash the roof?
No. We soft wash roofs using low pressure and a cleaning solution that kills the algae and moss. High pressure cracks shingles, blasts off the granules, and can void your roof warranty. Soft washing is the method shingle manufacturers actually recommend.
How much does roof cleaning cost in Riverdale?
It depends on the size, pitch, number of stories, and how much moss or lichen has built up. A one-story Cape is very different from a two-story colonial with heavy north-side streaking. We give free, no-pressure estimates so you get a real number, not a guess.
Why does my roof have those black streaks?
It's roof algae, common all over Morris County because of our humid summers and tree cover. It shows worst on shaded, north-facing slopes that stay damp. It spreads over time and can hold heat and moisture against your shingles if left alone.
How long until the streaks come back?
A proper soft wash treatment typically keeps a roof clean for a few years. Homes under heavy tree shade near Riverdale's wooded sections may see it return sooner because those roofs stay damp longer. We can talk through what to expect for your specific home.
Do you clean the gutters too?
Yes. A lot of Riverdale homes with tree cover have gutters packed with debris, which keeps the roof edge wet and feeds moss growth. We handle gutter cleaning along with the roof so you're not calling two companies.
How much does roof cleaning cost in NJ?
It ranges widely — from a few hundred dollars for a small ranch to several thousand for a large, steep or complex roof. Size, pitch, material, access and how much algae has built up all factor in. You get a firm price up front, free.
Will roof cleaning damage my shingles?
No. We soft wash with low pressure and a cleaning solution — the method asphalt-shingle makers recommend. High-pressure washing is what damages roofs; we never do that on a roof.
What are the black streaks on my roof?
That's a hardy algae called Gloeocapsa magma. It feeds on the limestone in your shingles and spreads in New Jersey's humidity. Soft washing kills it at the root, not just the surface.
How long does a roof cleaning last?
Usually 2–4 years. Because soft washing kills the algae instead of just rinsing it, the clean lasts far longer than a quick power-rinse.
North Jersey · 854+ five-star reviews
Pick your own time
Choose a slot that actually suits you and it's confirmed on the spot — no phone tag, no waiting on a callback.
- A real person comes out and prices the work in front of you
- Exact price before anything starts, in writing
- Free, and there's no obligation to book the job
Rather talk it through?
(973) 500-8155info@gallobrospw.com