Why Roof Choice Matters More in Fire-Prone Areas
Wildfires don't need direct flame contact to damage a home. Airborne embers, sometimes carried well ahead of a fire front, are one of the most common ways homes ignite. Roofs are one of the most exposed surfaces on a home, which is why fire rating matters so much more for homeowners in New Mexico's mountainous and forested communities than it does in lower-risk areas.
Roofing materials are rated Class A, B, or C under a standardized test (ASTM E108), with Class A representing the highest level of fire resistance. Class A materials are tested for their ability to resist flame spread across the surface, resist fire penetrating through the roof deck, and withstand recurring exposure to flame.
How the Main Roofing Materials Compare
Metal Roofing
Metal is naturally noncombustible and performs strongly under real fire exposure. Independent burn testing conducted at high elevation, a useful reference for New Mexico's mountain communities, found that metal roofing limited underlying deck charring more effectively than either synthetic shake or asphalt shingle products in the same test conditions. If maximum fire protection is your top priority, metal is generally the strongest choice available.
Enviroshake Composite Shake
Enviroshake earns an unconditional Class A fire rating without relying on supplementary underlayment systems. That's worth understanding, since many composite roofing products only reach Class A when paired with additional fire-resistant layers, which adds cost and installation complexity. Enviroshake achieves its rating on the product itself.
This matters most for homeowners who want the traditional look of cedar shake or slate without the fire liability of real wood. Many insurers have grown hesitant to cover natural wood shake roofs in high fire-risk zones, so a Class A-rated composite is a sensible middle ground between looks and safety.
Asphalt Shingles (including GAF)
Fiberglass-based asphalt shingles, including GAF's standard product lines, are also typically Class A rated. Asphalt remains one of the most affordable Class A options and performs reliably as a baseline fire-resistant choice. Not all asphalt shingles carry the same rating, though. Older organic-mat shingles are more likely to fall into the lower Class C category, so confirm the specific rating of any shingle product before installing.
Natural Wood Shake
Untreated wood shakes are often rated Class C, or carry no fire rating at all. Some products can achieve a Class A rating with factory-applied fire-retardant treatment, but many local building codes in high fire-risk areas restrict or prohibit wood shake roofing outright, regardless of treatment. Homeowners specifically drawn to the wood shake aesthetic in a wildfire-prone area are usually better served by a Class A-rated composite alternative.
A Practical Way to Think About It
- Want maximum fire protection, full stop? Metal roofing is the strongest performer in real-world testing.
- Want the wood shake or slate look without the fire risk of real wood? Enviroshake is a Class A alternative.
- Working with a tighter budget, in a moderate-risk area? A quality Class A asphalt shingle remains a dependable, affordable option.
- Considering natural wood shake in a high-risk area? Check local building codes first. Many areas restrict it regardless of treatment, and insurance coverage can be difficult to secure.
For more on this topic, see our guide on Metal Roofing vs. Shingles.