When you look at your home, your roof is one of the first things you notice—and if you’ve spotted black streaks, moss patches, or an overall dingy look, you’re not alone. Here on Long Island, the mix of coastal air, tree cover, and humidity creates the perfect environment for algae, mold, and mildew to thrive on your roof.
That’s where K.O.S. Cleaning comes in. Since 2006, we’ve helped homeowners like you protect their biggest investment—their home—with our safe, effective soft washing for roofs on Long Island.
We don’t just spray and go. We bring years of experience, truck-mounted technology, and a deep commitment to doing things the right way. Whether your roof is asphalt, tile, or cedar shake, we’ll help it look like new again—without risking damage or voiding warranties.
Those dark lines or greenish stains aren’t just cosmetic—they’re a sign your roof might be under attack by organic growth. Left untreated, algae and moss can break down roofing materials, cause leaks, and drastically shorten the life of your roof. Plus, let’s be real: it doesn’t do your curb appeal any favors.
It might seem like blasting your roof with a pressure washer will do the trick, but in reality, it can do more harm than good. High-pressure cleaning can strip protective granules from shingles, damage the wood beneath, and even void your manufacturer’s warranty.
That’s why we say: no pressure, no problem.
Soft washing uses low-pressure water combined with biodegradable detergents to gently and thoroughly clean your roof. This process removes harmful organisms like algae, mold, and lichen at the root—without damaging your roofing materials.
We specialize in cedar shake roof soft washing, which demands a careful, expert touch. Cedar is a beautiful, natural material, but it’s porous and prone to harboring mold and moisture. Our team customizes the cleaning solution and technique to preserve the wood’s integrity while eliminating buildup.
Your roof protects everything underneath it. Don’t let mold, mildew, or algae reduce its life or ruin your home’s appearance. K.O.S. Cleaning is your trusted soft washing expert on Long Island, ready to bring your roof back to life—safely, professionally, and with care.
Ready to see the difference for yourself?
📞 Call us now at (631) 560-8999 to schedule a free estimate.
Every 1–3 years depending on shade, weather, and roof type.
Not at all. It’s the safest method and follows manufacturer guidelines.
Most jobs are done in just a few hours.
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