How to Remove Green Algae From Vinyl Siding on Long Island

That green film on your siding isn't just ugly — it's a sign of deeper problems. Here's the safe way to eliminate it.

🎖️ Veteran Owned 📅 2026-04-19 ✅ Expert Advice

Why Long Island Homes Get Green Algae So Fast

Long Island's unique combination of coastal humidity, mature tree coverage, and seasonal temperature swings creates the perfect breeding ground for green algae on vinyl siding. North-facing walls, shaded areas near fences, and sections under roof overhangs are hit hardest because they retain moisture longest.

The green film you're seeing is actually millions of microscopic organisms that have embedded themselves into the textured surface of your vinyl. Surface-level rinsing with a garden hose barely touches it. And here's the critical part: pressure washing vinyl siding is one of the most common mistakes Long Island homeowners make.

Why You Should Never Pressure Wash Vinyl Siding

High-pressure water can:

Professional Soft Washing: The Safe Solution

Our professional house washing service uses soft washing technology — approximately 60 PSI with biodegradable cleaning agents that kill algae at the root. The solution does the work, not the pressure. Your siding comes out looking brand new without any risk of damage.

Most Long Island house washes range from $300 to $800 depending on home size and number of stories. We pre-rinse and protect all landscaping before application.

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