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 · 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 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 · 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