Fire rated siding is real and measured by tests like ASTM E84, but fireproof siding is not a true building-code category. Founded in 2011, woman-owned Coastal Windows & Exteriors has completed 7,000+ installations across 730+ towns in Massachusetts, New Hampshire and Maine, and we’ll help you compare fire ratings across siding materials so you know exactly what each one offers.
The two terms sound alike but mean very different things. A fire rating reflects tested performance, while fireproof suggests a guarantee no cladding can offer. Knowing the distinction helps you choose siding with clear, honest expectations.
What Homeowners Need to Know:
- Fire rated, yes: Fire rated siding is real and measured under standards like ASTM E84. Fireproof siding, by contrast, is not a code term.
- What it means: A fire rating shows how well a material resists flame spread. Class A fire rated siding marks the highest level.
- Materials that qualify: Fiber cement, brick, and stone earn strong fire ratings. Many vinyl products meet Class A fire rated siding levels as well.
- The top tier: James Hardie fiber cement is non-combustible and adds no fuel. It reaches the Class A rating cleanly.
- No true fireproof: No siding is fully fireproof, though several are highly fire resistant. Honest wording matters for safety.
Comparing Fire Rated Siding Options
| Option | Pros | Cons | Best For | Fire Behavior |
|---|---|---|---|---|
| Fiber cement | Non-combustible, no fuel added, durable | Higher cost than vinyl | Fire-prone areas, longevity | Class A, will not ignite |
| Vinyl | Affordable, many Class A products, low upkeep | Combustible, softens in heat | Budget, broad use | Class A possible, still burns |
| Brick or stone | Non-combustible, very long-lasting | Highest cost, heavy | Premium, masonry homes | Strong fire rating |
| Wood | Natural look, renewable | Ignites easily, spreads fire | Aesthetic-first builds | Least fire safe |
Choosing the Right Fire Rated Siding
Top Recommendation: Choose James Hardie fiber cement for non-combustible, Class A performance. Get a free estimate to compare options.
Best for budget: Pick a Class A vinyl product when cost leads your decision.
Smart for premium homes: Consider brick or stone for a strong, lasting fire rating.
Ready to compare fire rated siding? Schedule a free consultation today. Coastal Windows & Exteriors is a James Hardie Elite Preferred Contractor and the #1 woman-owned James Hardie exterior remodeling company in New England, with 7,000+ installations across MA, NH, and ME. Financing runs up to 20 years through third-party vendors, based on credit approval.
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Still have questions about Is there fire rated or fireproof siding? See the areas we serve and talk to your local siding contractor.
Last Updated: September 2026
Sources:
- Fiber cement siding averages about $21,500 installed in the US. JLC 2025 Cost vs. Value Report, New England, regional cost data for fiber cement siding replacement. (2026)
