Why Roof Cleaning Is Essential Before the Summer Sun Hits
Let’s face it—when’s the last time you really looked at your roof?
If you’ve noticed black streaks, moss, or green stains creeping across your shingles, it’s not just dirt—and it won’t go away on its own.
At K.O.S. Cleaning, we’ve seen what happens when a roof goes too long without a proper cleaning. And if you're in Suffolk County, the time to clean it is now, before the summer heat sets in.
What Happens When You Wait Too Long?
As temperatures rise, all that mold, algae, and debris baking under the sun starts to cause real damage. Those dark stains don’t just look bad—they retain heat and moisture, breaking down your shingles from the inside out.
What starts as a cosmetic issue can quickly turn into:
- Shortened roof lifespan
- Higher energy bills
- Risk of leaks and water damage
- Insurance issues (some companies flag dirty roofs!)
We’ve seen homeowners shocked to learn that their “just dirty” roof was on the verge of needing full replacement.
How Soft Washing Protects Your Roof
Unlike pressure washing, which can actually ruin shingles, our soft washing method is:
- Safe for all roofing materials
- Gentle yet effective
- Powered by cleaners that kill algae and mold at the root
Our techs apply a low-pressure solution that treats stains without lifting or damaging your roof’s surface—leaving your home looking brighter and healthier.

A Real Story from a Local Customer
“We were getting quotes for a new roof, but someone told us to try a cleaning first. K.O.S. came out, explained everything, and cleaned it the next day. I couldn’t believe the difference—it looked brand new!”
— Rebecca L., Holtsville, NY
A Cleaning Now Saves You Later
Think of roof cleaning as preventative care. You wouldn’t ignore a cavity just because it’s small—you’d fix it before it turns into a root canal.
Same goes for your roof. A quick soft wash now could save you thousands down the road.
Serving All of Suffolk County
From Bayport to Smithtown, we’re Suffolk County’s go-to team for soft roof washing. We’ve been in business since 2006, and every project comes with zero hidden fees and full transparency.
Ready to See the Streaks Disappear?
Don’t let black streaks steal your curb appeal—or your roof’s lifespan.
đź“ž Call K.O.S. Cleaning today at
(631) 560-8999 or request a free estimate
Roof Soft Washing FAQ's
What are the black streaks on my roof?
Those black streaks are most likely Gloeocapsa magma—a type of algae that feeds on the limestone in your shingles. It spreads over time, traps moisture, and can cause long-term damage if not treated properly.
Is roof cleaning safe for asphalt shingles?
Yes, when done properly. We use a soft washing method that applies cleaning solutions with low pressure—removing stains without stripping away the protective granules on your shingles.
How often should I clean my roof in Suffolk County?
n general, we recommend professional roof cleaning every 3–5 years. However, if you see stains, moss, or dark streaks, it’s smart to schedule a cleaning before those issues take root—especially with the heat and humidity of a Long Island summer.
Can roof cleaning help with energy efficiency?
Absolutely. Dirty roofs absorb more heat, which can make your attic hotter and force your A/C to work harder. A clean roof reflects more sunlight and can help reduce energy bills during the summer months.
Your Top Rated Cleaning Specialists
"We guarantee the most thorough cleaning ever, all with zero hidden fees"
Schedule Your Free Estimate
Tell Us A Little About Your Cleaning Needs At Your Home Or Business
