In Kerala’s humid and rainy climate, moss and algae growth on roofs is a common problem. While they may look harmless at first, they can cause shingle damage, leaks, and reduced roof lifespan if not treated properly. Cleaning them off requires care—improper methods can damage your shingles or void warranties.
Here’s a guide on how to safely clean moss and algae from your shingle roof.
🌱 Why Do Moss and Algae Grow on Shingles?
Moisture retention after rains.
Shade from trees preventing roof surfaces from drying.
Organic debris like leaves acting as a food source.
Porous surfaces of shingles allowing growth if not maintained.
Shingles like Architectural Roofing Shingles and Premium Designer Shingles are designed with algae-resistant granules, but even they require periodic cleaning in Kerala’s climate.
⚠️ The Risks of DIY Roof Cleaning
High-pressure washing can strip off protective granules.
Harsh chemicals may discolor shingles or harm landscaping.
Walking on roofs without proper safety can cause accidents and damage shingles.
✅ Safe Methods to Clean Moss and Algae
1. Gentle Cleaning Solutions
Use a 50:50 mix of water and household bleach applied with a pump sprayer. Let it sit for 15–20 minutes, then rinse with low-pressure water. This kills moss and algae without harming shingles.
2. Soft Brushing (If Needed)
Use a soft-bristle brush to gently loosen stubborn moss. Avoid scrubbing too hard, as this may damage shingle granules.
3. Preventive Measures
Install zinc or copper strips near the ridge line—rainwater will carry ions that inhibit algae growth.
Keep gutters clear with accessory products to reduce water retention.
Trim nearby tree branches to allow sunlight and air circulation.
🏠 Shingles That Resist Algae and Moss
For long-term protection, consider shingles with built-in algae resistance such as:
Dynasty Roofing Shingles – engineered for storm resistance and algae defense.
Armourshake Roofing Shingles – premium durability with added protection.
Traditional 3-Tab Shingles – cost-effective, with algae-resistant options available.
📞 Professional Roof Cleaning in Kerala
While homeowners can manage small patches, larger moss and algae growth should be handled by experts. Improper cleaning can reduce roof lifespan or void warranties.
👉 Explore our roofing services and see our completed roofing shingle projects for inspiration. For safe, professional roof care, contact Scaffs India today.
✅ Final Thoughts
Moss and algae don’t just affect your roof’s appearance—they can shorten its lifespan if left untreated. Cleaning with the right methods and investing in algae-resistant shingles ensures your home stays strong, beautiful, and energy-efficient for years to come.