Roofing Glossary

Roof Fire Rating (Class A/B/C)

Roof fire ratings classify how well a roof covering resists external fire exposure — burning brands, flames, and wind-blown embers. Class A is the highest rating, followed by B and C.

The test exposes the roofing to burning brands and flame spread under controlled conditions. Class A coverings — which include most fiberglass asphalt shingles, metal, slate, and tile — provide the strongest protection against ignition from embers landing on the roof.

In wildfire-prone regions, Class A is often required by code, and untreated wood shakes — typically Class C at best — may be restricted. In most suburban settings the rating matters mainly for insurance and peace of mind.

Why It Matters

Most modern roofing materials already carry Class A, so this is rarely a decision point — but verify it on any quote, especially for wood or specialty materials.

A Maryland Note

Maryland is not wildfire country, so fire rating is seldom the deciding factor here — but Class A remains the standard you should expect on any new roof.

Questions about your own roof? Request a free estimate or call Nucci Brothers Roofing at (301) 458-1003.