When people think about roof damage, they often imagine heavy rains, strong winds, or falling branches. Yet, there is a silent enemy that slowly eats away at roofing materials: acid rain.
In Kerala’s humid climate, where rainfall is frequent, roofs are constantly exposed to airborne pollutants that combine with rainwater, creating acidic conditions. Over time, this hidden problem reduces roof performance and lifespan.
What Is Acid Rain?
Acid rain is formed when sulphur dioxide (SO₂) and nitrogen oxides (NOₓ) from industrial emissions, vehicle exhaust, and burning fuels mix with atmospheric moisture. The result is rainfall with a lower pH level, which can be corrosive to building materials.
Kerala’s growing urbanization means that even in traditionally greener regions, homes and cottages are not immune to acid rain exposure.
How Acid Rain Damages Roofing Materials
1. Asphalt Shingles
Traditional 3-tab asphalt shingles are especially vulnerable. Acid rain accelerates granule loss, reducing their protective UV layer and causing early aging.
2. Premium and Architectural Shingles
While premium designer shingles and architectural shingles like the Dynasty series are more resistant, prolonged exposure can still cause surface erosion and discoloration.
3. Clay and Ceramic Tiles
High-performance European tiles such as Borja-Tech, Borja-Extrem, and TB-12 tiles are more durable, but acid rain can etch their surfaces, weakening protective glazing over decades.
4. Metal Roofs and Accessories
Metal fasteners, gutters, and roof accessory products are highly susceptible to corrosion when exposed to acidic conditions, leading to leaks and structural weakness.
5. Solar Roof Tiles
Even advanced solar roof tiles require protective coatings to prevent acid rain from damaging photovoltaic surfaces.
Visible Signs of Acid Rain Damage on Roofs
Fading or discoloration of shingles/tiles
Loss of protective granules on asphalt shingles
Rust or pitting on metal accessories
Hairline cracks on clay or ceramic tiles
Premature leaks despite recent installation
How to Protect Roofs from Acid Rain
Choose High-Quality Materials
Premium shingles like Armourshake or European tiles with protective finishes resist chemical damage better.Apply Protective Coatings
Sealants and surface treatments reduce the corrosive effect of acid rain.Regular Maintenance
Annual roof cleaning prevents acid buildup and extends lifespan.Use Durable Accessories
Corrosion-resistant accessory products are essential to safeguard drainage and fastenings.Professional Installation
Partnering with experts like Scaffs India ensures proper ventilation and sealing to limit acid rain damage.
Conclusion
Acid rain is a slow but serious threat to roofs in Kerala. Whether you choose asphalt shingles, premium designer shingles, or advanced solar tiles, understanding the risks of acid rain helps in making long-term roofing decisions.
At Scaffs India, we provide roofing systems that combine durability, aesthetics, and resistance to environmental damage.
👉 Browse our roofing projects or contact us today to protect your home against acid rain and extend your roof’s lifespan.