Class A fire ratings indicate a flame spread rating somewhere between zero and 25. Materials that fall into Class A or Class 1 include things like brick, gypsum wallboard, and fiber cement exterior materials. These materials do not burn well and are very unlikely to contribute fuel to a fire.

Is Class A fire rating good?

The Class A or Class I rating indicates superior fire protection. Fabrics used in these building types are also required to be flame retardant.

What is a Class A rating?

Class A fire retardants have a flame spread rating of between zero and 25. These materials are effective against severe fire exposure.