When it comes to repairing an aging roof, many property owners ask: Can I just layer new shingles over the old ones? It’s a tempting idea—less mess, less labour, lower cost. But while layering may seem efficient, it’s not always legal, safe, or practical—especially in Kerala’s hot, humid, and coastal climate.
At Scaffs India, we break down what Indian building codes, manufacturer warranties, and Kerala roofing conditions say about re-roofing with layered shingles.
🏚️ What Does Layering Shingles Mean?
Layering, or a roof overlay, involves installing a second (or even third) layer of shingles directly over the existing roof covering without tearing off the old layer.
It is typically done with asphalt shingles, including:
While allowed under some circumstances, this method is not always advisable.
⚖️ What Do Local and National Codes Say?
India lacks a unified national code specifically on re-roofing overlays. However, guidelines derived from IBC (International Building Code) and best practice standards are often applied, especially by premium contractors in Kerala.
Here’s what generally applies:
| Rule | Standard |
|---|---|
| Max. shingle layers allowed | Typically only 1 layer overlay (2 layers total) |
| Deck inspection | Required before overlay; must be dry, flat, and rot-free |
| Overlay not allowed if… | Shingles are curled, warped, or leaking; roof already has 2 layers |
| Ventilation check required | Poor ventilation leads to premature failure in Kerala’s climate |
| Local permission | Some municipalities may require tear-off and disposal |
🏠 At Scaffs India, we always evaluate deck integrity, structural load capacity, and climatic risk factors before advising a roof overlay.
❌ Risks of Layering Shingles in Kerala
Kerala’s unique weather makes shingle overlays a high-risk option unless carefully executed. Here’s why:
Traps Moisture: Kerala’s humid air can get trapped between layers, causing rot and mould
Increased Weight: Extra layers stress rafters, especially during monsoon downpours
Shorter Lifespan: Overlays age faster due to poor thermal ventilation
Warranty Voids: Many brands void warranties if shingles are layered without specific underlayment
Fire Rating Impact: Layering may reduce the roof’s fire-resistance rating, especially in older homes
🛠️ That’s why our experts often recommend full tear-off before installing modern roofing solutions like Borja Tech solar-integrated tiles or Alicantina ceramic roofs.
🧾 Manufacturer Warranties and Re-Roofing
Most global roofing shingle brands—including those offered by Scaffs India—have the following warranty conditions:
Only 1 existing layer allowed beneath
Must use approved underlayments (e.g., waterproof membranes)
Full tear-off required for premium designer ranges
Layering voids warranty in high-humidity zones unless specific insulation is added
📌 Before planning an overlay, ask our team for warranty-compliant installation advice on our shingle range.
🏗️ When Is Layering Ever Acceptable?
You may consider layering shingles only when:
✅ The existing roof is flat and free from soft spots
✅ No visible damage or leaks exist
✅ You’re on a tight budget for a temporary solution
✅ The structure can support the extra weight
✅ You’re not switching materials (e.g., from 3-tab to laminated designer shingles)
Even then, proper flashing, drip edges, and vents must be reinstalled, not reused.
🧠 Scaffs India’s Expert Take: Tear-Offs Are Long-Term Wins
While overlays save short-term money, they cost more in the long run:
Shorter lifespan = earlier replacement
Risk of trapped leaks = hidden structural damage
Lower resale value for the home
Disqualified from fire and wind insurance coverage in some cases
Our recommendation: do it once, do it right. Remove old shingles, inspect the deck, and apply new systems with full compliance and warranties.
✅ Choose Scaffs India for Safe, Code-Compliant Re-Roofing
Whether you’re restoring a resort roof, retrofitting a wooden cottage, or upgrading to solar roofing tiles, we offer:
Tear-off and disposal of old shingles
Deck reinforcement and ventilation checks
Code-compliant installation with documentation
Help with permits and post-installation inspections
Roofing that meets Indian and international safety codes
📞 Let’s Talk About Your Roof
Still unsure if your roof qualifies for layering? Let us assess it first—honestly and expertly.
🔗 Contact Scaffs India for a Site Visit
🔗 Explore Our Roofing Shingle Projects
🔗 Learn About Our Roofing Expertise
🏁 Final Word: Layering May Be Legal—But Not Always Wise
In Kerala’s damp, high-heat climate, shingle layering should be approached cautiously. Most clients benefit from a complete roof replacement that brings better longevity, safety, and design flexibility.
Trust Scaffs India for a roofing job that’s not just cost-effective—but also climate-strong, code-compliant, and built to last.
At Scaffs India, we provide comprehensive roof inspection and repair services. Our team will assess the damage and ensure your roof is in top condition. Learn more about our roof repair services.
Scaffs India is your go-to expert for premium roofing shingles in Kerala—combining aesthetics, performance, and protection for every project.We invite you to explore some of the beautiful roofing choices.For more information regarding how IKO Roofing shingles can be used for your roofing project, visit our
contact page link here and get in touch. or call +91 96455 55534.