The Dangers of Moss & Algae Growth on Your Roof (And How to Prevent It!)

March 28, 2025

Why Moss and Algae Growth Is a Problem for Your Roof

Living in the Seattle-Tacoma area, we enjoy the lush greenery and fresh Pacific Northwest air. But with that beauty comes a challenge—our damp climate creates the perfect breeding ground for moss, algae, and lichen to grow on roofs.


Many homeowners don’t realize that moss and algae aren’t just cosmetic issues—they can cause serious damage to your roof if left untreated. Here’s why:

The Hidden Dangers of Moss and Algae

  • Shingle Damage & Roof Deterioration – Moss holds moisture against your roof, causing shingles to lift, crack, and decay over time. This can lead to costly roof repairs or even premature replacement.
  • Water Damage & Leaks – As moss grows, it traps water, which can seep under shingles and cause leaks. Over time, this moisture can rot your roof’s underlayment and even damage your attic or ceilings.
  • Black Streaks & Curb Appeal Issues – Those dark streaks you see on many roofs? That’s a type of airborne algae called Gloeocapsa Magma, which spreads quickly and makes your home look older and neglected.
  • Increased Energy Costs – A dirty roof absorbs more heat in the summer, making your home warmer and increasing cooling costs.

DIY Roof Cleaning: Why It’s Risky

Many homeowners try to clean their roofs using a pressure washer, but this can strip away protective layers, damage shingles, and void your roof warranty. Others use DIY treatments that can be ineffective or even worsen the problem.

How Precision Pro Wash Safely Removes Moss & Algae

At  Precision Pro Wash, we specialize in soft washing, a gentle yet powerful cleaning method that:
✔️ Uses  low pressure to protect shingles
✔️ Eliminates moss, algae, and bacteria at the  root
✔️ Prevents regrowth for a  longer-lasting clean

Prevent Moss Growth with Regular Roof Maintenance

The best way to keep your roof clean? Schedule regular professional cleanings every 12-24 months. Keeping your roof free from debris, trimming overhanging branches, and ensuring proper drainage will also help prevent moss and algae buildup.

Don’t Wait Until It’s Too Late!

Protect your home and extend the life of your roof with Precision Pro Wash’s expert roof cleaning service. Contact us today for a free estimate!

How Often Should You Get Your Roof Cleaned? A Homeowner’s Guide

March 28, 2025
Your roof is one of the most important investments in your home, yet it’s often overlooked when it comes to regular maintenance. Many homeowners only think about their roof when a leak appears—but by then, costly damage may have already occurred.  So, how often should you have your roof professionally cleaned? It depends on several factors.
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