Top Rated Roof Washing Services In Suffolk County

Expert Residential & Commercial Service Since 2006

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Roof Washing Prevents Costly Damage

Your roof plays a vital role in regulating the internal temperature of your home or business. When it's littered with leaves, covered in moss, algae or other debris it can become damaged to the point where water and moisture will begin to intrude.


There are two main methods for cleaning a roof: a “soft” wash or a pressure wash. A soft wash uses chemicals as the primary method of cleaning. A pressure wash uses the strength of highly pressurized water to strip away any dirt and grime.


The purpose of these services is to remove debris and any silt, algae, or fungal build up on the roof and to provide a closer inspection at the roof surface. Algae, fungus, or lichen can build up on your shingles and roof tiles and eat away at the material diminishing their ability to protect your home from water intrusion, pests or hot and cold weather.


Soft Roof Washing Long Island
Soft Roof Washing Long Island

Roof Washing Prevents Costly Damage

Your roof plays a vital role in regulating the internal temperature of your home or business. When it's littered with leaves, covered in moss, algae or other debris it can become damaged to the point where water and moisture will begin to intrude.


There are two main methods for cleaning a roof: a “soft” wash or a pressure wash. A soft wash uses chemicals as the primary method of cleaning. A pressure wash uses the strength of highly pressurized water to strip away any dirt and grime.


The purpose of these services is to remove debris and any silt, algae, or fungal build up on the roof and to provide a closer inspection at the roof surface. Algae, fungus, or lichen can build up on your shingles and roof tiles and eat away at the material diminishing their ability to protect your home from water intrusion, pests or hot and cold weather.


KOS Cleaning is your top rated partner for premier roof washing services in Suffolk County, Long Island. Our roof soft washing team is dedicated to maintaining the integrity and beauty of your home with expert roof cleaning that guarantees lasting results.


Signs Your Roof Needs Cleaning

Get to know the tell tale signs of a roof that needs cleaning. Have concerns or questions? Contact the roof cleaning experts at KOS for a free estimate at your home or business.

Visible Algae or Moss Growth

If you notice green or black streaks on your roof, it's likely algae or moss. These organisms hold moisture against the surface, which can lead to rot and damage.

Debris Accumulation

Leaves, branches, and other debris can trap moisture, leading to mold and mildew growth. A roof washing will prevent potential damage.

Aging Roof Appearance

If your roof looks old and worn out, a professional cleaning can rejuvenate its appearance, making it look almost new again.

Dark Stains or Discoloration

Dark patches on your roof can indicate the presence of algae. These stains not only look unsightly but can also affect the roof’s ability to reflect heat.

Clogged Gutters

If your gutters are frequently clogged, it may be due to debris buildup on the roof. Clean gutters are essential for proper drainage and to prevent water damage.

Bird Droppings

Roosting birds that spend excessive time on your roof may leave unsightly droppings are require cleaning. 

Signs Your Roof Needs Cleaning

Get to know the tell tale signs of a roof that needs cleaning. Have concerns or questions Contact the roof cleaning experts at KOS for a free estimate at your home or business.

Visible Algae or Moss Growth

If you notice green or black streaks on your roof, it's likely algae or moss. These organisms hold moisture against the surface, which can lead to rot and damage.

Debris Accumulation

Leaves, branches, and other debris can trap moisture, leading to mold and mildew growth. A thorough roof washing removes this debris, preventing potential damage.

Aging Roof Appearance

If your roof looks old and worn out, a professional cleaning can rejuvenate its appearance, making it look almost new again.

Dark Stains or Discoloration

Dark patches on your roof can indicate the presence of algae. These stains not only look unsightly but can also affect the roof’s ability to reflect heat.

Clogged Gutters

If your gutters are frequently clogged, it may be due to debris buildup on the roof. Clean gutters are essential for proper drainage and to prevent water damage.

Bird Droppings

Roosting birds that spend excessive time on your roof may leave unsightly droppings and require cleaning. 

Types of Roofing We Clean

At KOS Cleaning, we understand that no two roofs are the same—and neither are the problems that come with them. Whether you’re a homeowner worried about black streaks ruining your curb appeal or a business owner concerned about algae eating away at your shingles, we can help.


Over time, roof surfaces quietly collect dirt, mold, mildew, algae, and lichen—turning what was once a clean, vibrant rooftop into something that looks weathered, stained, and neglected. And we get it. It’s frustrating. You work hard to take care of your property… but your roof makes it look like you don’t.


That’s why our team is trained to safely and effectively clean all roofing materials using a soft washing method that won’t cause damage. We specialize in removing organic growth and buildup without the high pressure that can loosen shingles or void your roof’s warranty.


We Clean the Following Roof Types:

Asphalt Shingles – The most common type in Suffolk County. We gently remove black algae streaks and mildew that make your home look older than it is.



  • Asphalt Shingle Roofs – These are the most common on Long Island. We safely remove black algae streaks, mildew, and stains that age your home and shorten your roof’s lifespan.
  • Cedar Shake Roofs – We clean and brighten natural wood roofs with care, preventing rot and preserving the integrity of the shingles.
  • Metal Roofs – Dirt, algae, and rust stains don’t stand a chance against our safe soft washing process.
  • Slate Roofs – We restore the beauty of slate without the risk of cracking or surface damage.
  • Flat Roof Systems (EPDM, TPO, and PVC) – For commercial and residential buildings alike, we help remove built-up grime and extend roof lifespan.

We’ve helped homeowners across Suffolk County feel proud of their home again—and we’d love to do the same for you.

Call (631) 560-8999 to schedule an estimate at your home or business.

Your Top Rated Cleaning Specialists

We guarantee  the most thorough cleaning ever, all with zero hidden fees"

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