Will Roofing Shingles Burn?
Asphalt shingles will burn if exposed to sustained direct flame, but they’re classified as Class A fire-resistant — the highest rating available. This means they resist fire spread, resist sustained flame exposure for at least 2 hours in testing, and won’t produce burning embers that spread fire. They’re fire-resistant, not fireproof. No roofing material is truly fireproof.
- Asphalt shingles: Class A — highest fire resistance rating. Won’t easily ignite from embers or radiant heat.
- Metal roofing: Class A — non-combustible. The safest option in wildfire zones.
- Clay/concrete tile: Class A — non-combustible. Excellent fire performance.
- Wood shake: Class C or unrated — significantly more flammable. Banned in many fire-prone areas.
- Slate: Class A — natural stone is inherently non-combustible.
Understanding Fire Ratings
| Rating | What It Means | Materials |
|---|---|---|
| Class A | Most fire-resistant. Resists severe fire exposure. | Asphalt, metal, tile, slate, some composites |
| Class B | Moderate fire resistance. | Some treated wood products |
| Class C | Light fire resistance. | Untreated wood shake, some older materials |
| Unrated | No fire testing performed. | Raw wood, thatch |
Class A is required by building code in most US jurisdictions. In wildfire-prone areas (California WUI zones, Colorado, parts of the West), Class A is mandatory and wood shake is often prohibited entirely.
How Shingles Perform in Real Fires
The biggest fire threat to a roof isn’t direct flame contact — it’s flying embers. In wildfires and structure fires, embers travel hundreds of feet through the air and land on roofs. Class A shingles resist ignition from embers. The fiberglass mat inside modern asphalt shingles acts as a fire barrier, preventing flame from penetrating through to the deck.
That said, no shingle survives a fully engulfed structure fire. The fire resistance is about preventing ignition and slowing spread — giving occupants time to evacuate and firefighters time to respond.
Best Roofing for Fire Safety
In wildfire-prone areas, metal roofing is the top recommendation. It’s non-combustible, won’t ignite from embers, and doesn’t contribute fuel to a fire. Combined with ember-resistant vents and non-combustible soffits, a metal roof is the strongest fire-defense system available.
Frequently Asked Questions
Are asphalt shingles fireproof?
No — fire-resistant, not fireproof. They carry a Class A rating (highest available) but will eventually burn under sustained direct flame.
Can a roof fire be caused by lightning?
Yes. Lightning strikes can ignite roof materials, particularly wood shake. Asphalt and metal roofs are much more resistant to lightning-caused fires.
Do I need fire-rated shingles?
In most US jurisdictions, Class A fire-rated roofing is required by building code. Standard architectural asphalt shingles from GAF, Owens Corning, and CertainTeed all carry Class A ratings.
Written by the Roofana Team · Last updated: July 2026
Related: Shingles & Materials Hub · Most Durable Materials · Best Roofing Materials
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