Roof Cleaning in Flemington, NJ
Low-pressure soft wash that lifts black streaks, moss & algae without touching your shingles.
Roof Cleaning in Flemington, NJ
If you've noticed dark streaks running down your roof around Flemington, that's not dirt and it won't wash off in the rain. It's Gloeocapsa magma, a hardy algae that thrives in the humid summers and shaded, tree-lined lots common across Hunterdon County. On the older colonials and Victorians near the Main Street historic district, plus the newer developments out toward Route 31 and the Raritan Township line, we see it constantly on north-facing slopes that stay damp under mature oaks and maples.
Gallo Bros is a family-owned North Jersey exterior cleaning company, and we clean roofs the way asphalt shingle manufacturers actually recommend: with soft washing. That means low-pressure application and a cleaning solution that kills the algae and moss at the root, not a pressure washer that strips granules and voids your warranty. Blasting a shingle roof does real damage. We don't do that.
Flemington weather doesn't help matters. Freeze-thaw cycles all winter, then muggy summers, keep moss and lichen growing in gutter lines and valleys. We handle the whole exterior too, so if the roof needs attention, the gutters and siding usually do as well. Straight answers, honest pricing, no upsell games.
- Local crew that knows Flemington homes
- Soft-wash & low-pressure methods that protect your surfaces
- Licensed, insured & background-checked
- Upfront pricing — same-week scheduling
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Roof Cleaning near Flemington
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Real jobs, real Flemington homes — straight from our crew's cameras.
What neighbors say
5.0 · 854+ Google reviews“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
“I wanted power wash my backyard deck for a long time but they said it cannot be done due to the equipment was not accessible however Gallo Brothers had very long 400feet hose and did the power wash which was not done for many years. I am very happy they did a very good job specially Mark was very helpful to do front porch and walkway. It is speck clean this is exactly what I wanted to do. I do highly recommend Gallo Bothers meticulous job.”
Chong Cho
Roof Cleaning in Flemington — FAQ
Is soft washing safe for my Flemington roof?
Yes. Soft washing uses low pressure and a cleaning solution rather than high-pressure water, which is what shingle manufacturers recommend. It won't strip granules or loosen shingles the way a pressure washer can, and it kills the algae and moss instead of just rinsing the surface.
Why does my roof have black streaks?
Those streaks are a blue-green algae called Gloeocapsa magma. It feeds on the limestone filler in asphalt shingles and spreads fast in humid, shaded conditions, which is exactly the environment a lot of tree-covered Hunterdon County lots provide. Rain won't remove it, but soft washing will.
How long does roof cleaning last?
Results vary based on tree cover, roof pitch, and how much shade your home gets. Roofs under heavy tree canopy in Flemington tend to regrow algae sooner than roofs in full sun. We'll give you an honest expectation when we look at your specific roof rather than promise a set number.
Do you clean the gutters at the same time?
We can. A lot of Flemington homes with moss on the roof also have buildup in the gutters and valleys. Combining roof cleaning with gutter cleaning or a full house wash usually makes sense and saves a second trip.
Do you offer free estimates in Flemington?
Yes. Reach out and we'll come take a look at your roof, talk through what's realistic, and give you a straight price. No pressure and no gimmicks.
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