Fire-Resistant Metal Roofing Systems
Class A Fire Roofing Protection by Interlock®
Why Fire-Resistant Roofing Matters
If you live in an area prone to wildfires, you understand the importance of choosing materials to protect your home. The roof is one of the most vulnerable parts of any house during a fire — embers can travel miles, landing on rooftops and igniting flammable materials. Choosing a fire-resistant roofing system isn't just a precaution. It's a necessity.
The Power of Class A Fire-Rated Roofing
Interlock® Metal Roofing Systems are engineered with fire safety in mind — delivering high-performance protection for homes in wildfire-prone and rural areas. Our non-combustible aluminum shingles are designed to resist ignition from embers, sparks, and direct flame exposure.
When installed with two layers of GAF VersaShield® underlayment over a 15/32" plywood deck, Interlock Metal Roofing Systems can achieve a Class A fire rating — the highest standard for residential roofing in North America. Unlike combustible materials such as wood or asphalt, an Interlock roof helps slow ignition and buy you precious time — and peace of mind. Ask your Interlock representative about our Class A fire-rated system configuration.
Why Interlock Is the Best Choice for Fire Protection
Class A Fire Rated
Highest residential fire protection, with proper assembly
Non-Combustible
Heavy-gauge aluminum won’t burn under extreme heat
Ember Resistant
Engineered to resist wind-blown wildfire embers
Lifetime Durability
Doesn’t warp, rot, or deteriorate over time
Energy Efficient
Reflective cool-roof surface lowers cooling costs
Eco-Friendly
High recycled aluminum content, fully recyclable
How Interlock Compares to Other Materials
| Roofing Material | Fire Resistance | Class A Fire Rating? | Risk of Ignition |
|---|---|---|---|
| Interlock Metal Roofing | Non-Combustible | Yes | Does Not Ignite |
| Asphalt Shingles | Fire-resistant with underlayment | Varies | Can Catch Fire |
| Wood Shakes | Highly Flammable | No | High Fire Risk |
| Clay Tiles | Fire-resistant | Yes | Low Risk |
Performance Specifications
| Specification | What it protects against |
|---|---|
| Wind resistance: 120+ mph (193+ kph) | Extreme wind, hurricanes, storm uplift: full interlocking attachment helps prevent blow-offs, edge lifting, and panel loss in high-gust events. |
| Fire rating: Class A (with proper assembly) | Wildfire, embers, radiant heat, chimney sparks: non-combustible roof assembly provides the highest residential fire protection rating. |
| Hail resistance: UL 2218 Class 4 | Hail and impact debris: highest impact classification; resists cracking, splitting, and surface loss common with asphalt under hail strikes. |
| Snow & ice performance: interlocking, shedding profile | Heavy snow, freeze-thaw, ice dams: smooth aluminum sheds snow efficiently and the interlocking design helps block water intrusion when melt-refreeze cycles occur. (Final snow-load capacity depends on roof structure and local code.) |
| Corrosion resistance: aluminum (won’t rust) | Salt air, coastal humidity, wet climates: aluminum naturally resists rust and corrosion, reducing long-term failure risk in marine or high-moisture environments. |
| Heat / UV durability: baked-on coating system | High heat, intense sun, thermal cycling: coatings resist UV breakdown and temperature-swing fatigue, slowing fading and surface degradation. |
| Moss / algae resistance: smooth coated surface | Wet shade, organic growth: low-porosity metal surface gives moss/algae less to grip, reducing staining and maintenance. |
| Material: heavy-gauge aluminum roof profiles (Slate / Shake / Shingle / Tile / Standing Seam) | All-season structural stability: lightweight, dent-resistant metal system stays stable through large hot-cold swings and severe weather. |
| Expected lifespan: 50+ years | Long-term durability across climates: avoids re-roof cycles typical of shorter-life materials, even in high-stress environments. |
| Warranty: Lifetime-Limited, non-prorated + 50-year transferable | Lifetime protection + resale value: guarantees long-term material confidence and transfers to future owners. |
Get a Free Fire-Resistant Roofing Estimate
A specialist will assess your home's wildfire exposure and recommend the right Class A assembly.
FAQs About Fire-Resistant Roofing
What makes Interlock Metal Roofing fire-resistant?
Interlock roofs are made from non-combustible heavy-gauge aluminum that does not ignite or spread flame. Installed with two layers of GAF VersaShield® underlayment over a 15/32" plywood deck, the assembly achieves a Class A fire rating — the highest standard for residential roofing.
How does Interlock compare to asphalt shingles for fire resistance?
Asphalt shingles are petroleum-based and can ignite under sustained ember exposure; ratings vary by product and underlayment. Interlock aluminum is non-combustible — it does not ignite — and helps slow fire spread, buying precious time.
Will a metal roof help reduce my homeowner’s insurance costs?
Many insurers offer discounts for Class A fire-rated, Class 4 impact-rated roofing, particularly in wildfire-prone regions. Benefits vary by provider and location — ask your insurer about non-combustible roofing credits.
Is Interlock Metal Roofing suitable for homes in all climates?
Yes. The same system that resists fire also withstands hurricane-force winds, heavy snow, hail and coastal salt air — tested across North America and proven from Florida to Alaska, and even Antarctica.
The Great Fire of 1830: Past Lessons, Present Protection in Gloucester, MA
Although Gloucester purchased its first fire engines in 1793, it was the catastrophic "Great Fire of 1830" that served as a wake-up call. On September 16, 1830, a house owned by Mr. Samuel Gilbert on the western end of Front Street caught fire. The blaze quickly spread, engulfing at least 27 dwelling houses and 43 stores and workshops, from the town landing to Porter Street.
The Samuel Gilbert House — originally built in 1750 by Nathaniel Ellery — stands today at the corner of Angle Street and Western Avenue. The historic structure now features an Interlock® aluminum slate roofing system: a fire-resistant roof that exemplifies today's commitment to fire safety in historic preservation, protecting the town's architectural heritage while safeguarding its community.
Don't wait until it's too late. Upgrade to a fire-resistant roof that stands the test of time.
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