Roof Cleaning in Short Hills, NJ
Low-pressure soft wash that lifts black streaks, moss & algae without touching your shingles.
Roof Cleaning in Short Hills, NJ
If you live in Short Hills, you already know the homes here aren't cookie-cutter. Between the older estates near Hartshorn and the tree-heavy lots off Hobart Ave, we see a lot of steep, complex rooflines, and plenty of slate, cedar shake, and architectural asphalt. Those shaded, mature-tree neighborhoods are exactly where roofs pick up black streaks (that's *Gloeocapsa magma*, a roof algae) plus moss and lichen on the north-facing slopes that never fully dry out.
We're Gallo Bros, a family-run exterior cleaning outfit working North Jersey. For roofs we use soft washing, not high pressure. Blasting a shingle roof strips granules and voids warranties; a low-pressure, detergent-based clean kills the algae and moss at the root without tearing anything up. On slate and cedar we adjust the approach again, because those materials don't forgive shortcuts.
Short Hills weather doesn't help your roof either. Humid summers, wet springs, and freeze-thaw winters let moisture sit in shaded areas for weeks. That's why streaks come back if a job is done wrong. We clean it properly the first time and tell you honestly what your roof actually needs.
- Local crew that knows Short Hills 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 Short Hills
Recent work in Short Hills
Real jobs, real Short Hills homes — straight from our crew's cameras.
What neighbors say
5.0 · 882+ 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
“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
Roof Cleaning in Short Hills — FAQ
Do you pressure wash roofs in Short Hills?
No. We soft wash roofs using low pressure and cleaning solution. High pressure damages asphalt shingles, loosens granules, and can harm slate and cedar. Soft washing is the method recommended for most residential roofs.
Can you clean slate and cedar shake roofs?
Yes. Many older Short Hills homes have slate or cedar shake, and both need a gentler, material-specific approach than standard asphalt. We adjust our solution strength and technique accordingly.
What are the black streaks on my roof?
That's roof algae (Gloeocapsa magma), extremely common on shaded, tree-lined streets in Short Hills. It feeds on shingle limestone filler. Soft washing kills it at the root instead of just rinsing the surface.
How long will the roof stay clean?
It depends on tree cover and sun exposure. Heavily shaded north-facing sections may see growth return sooner than open, sunny slopes. A proper soft wash keeps roofs clear for years, not months.
Do you protect landscaping during the job?
Yes. Short Hills properties often have established plantings, and we take steps to rinse and protect surrounding shrubs and gardens while we work.
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 · 882+ 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