Roof Cleaning in Bernardsville, NJ
Low-pressure soft wash that lifts black streaks, moss & algae without touching your shingles.
Roof Cleaning in Bernardsville, NJ
If you drive around Bernardsville and look up, you'll notice it: those dark streaks running down otherwise beautiful roofs. That black staining is *Gloeocapsa magma*, a hardy algae that thrives in the shaded, tree-heavy lots you find all over town — from the older homes near the train station and Olcott Square up through the wooded properties along Mine Mountain and the Bernardsville Mountain.
Around here we see a real mix: classic shingle roofs on Colonials and Capes, plus a fair share of slate and cedar shake on the older estate-style homes closer to the mountain. Those materials matter. You can't blast a roof with a pressure washer and expect it to hold up — especially aged slate or cedar. Gallo Bros uses a **soft wash** approach: low pressure and the right cleaning solution to kill the algae, moss, and lichen at the root instead of just knocking the surface loose.
We're a local family business covering North Jersey and Somerset County. Bernardsville's tree canopy and damp shade mean roofs here green up and streak faster than average, so if it's been a few years, it's probably time. We'll come look, tell you honestly what your roof needs, and give you a straight price.
- Local crew that knows Bernardsville 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 Bernardsville
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Real jobs, real Bernardsville homes — straight from our crew's cameras.
What neighbors say
5.0 · 880+ Google reviews“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
“Gallo Bros did an amazing job power-washing my home and roof. They assured me that if I had any concerns they would avail themselves to resolve them. After the cleaning a few leaves blocked the gutter after a heavy rain. They responded quickly and courteously, removing the blockage touched up ,y skylights as well. Before leaving they made sure I was satisfied. Oscar and his team came a few weeks later and sanded and sealed my paver walkway. They were polite and professional, explaining what they were doing, how long it would take, and instructions to ensure the best possible result. What I loved most was the professionalism in their communication. There were several days that we were rescheduled due to heavy rains and storms. The first thing they assured us of was their intent to make sure the job was done correctly. They would not come out to do the work, only to have it washed away. They stayed in contact every step of the way and I felt more than comfortable that the job would get completed the right way. If they couldn’t reach h me by phone they always left a voicemail or sent a text. I just happened to call them first in my search for roof cleaning, but I will never have to look further for these services again. I was really so impressed. Thank you Gallo Bros!”
Kim Wells
“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 Bernardsville — FAQ
Will roof cleaning damage my shingles?
No — we use soft washing, not high pressure. High pressure can strip the protective granules off asphalt shingles and crack older slate. Our low-pressure method applies a cleaning solution that kills the algae and moss so it rinses away without harming the roof.
Why does my Bernardsville roof have black streaks?
Those streaks are algae that feed on the limestone filler in shingles. Bernardsville's heavy tree cover and shaded, humid lots — common near Mine Mountain and the wooded areas off Route 202 — keep roofs damp longer, which lets algae, moss, and lichen take hold quickly.
Do you clean slate and cedar shake roofs?
Yes. Many older homes toward the Bernardsville Mountain have slate or cedar. These need extra care and the right approach — never high pressure. We adjust our method to the material so we clean it safely.
How long does a roof cleaning last?
Soft washing typically keeps a roof clean for a few years, though shaded, tree-lined properties can regrow algae sooner. We're happy to give an honest estimate of what to expect for your specific home.
Do you give free estimates in Bernardsville?
Yes. We'll come out, look at your roof and its condition, and give you a straight, no-pressure price. Reach out and we'll schedule a time that works.
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 · 880+ 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