What is the thickness of a fire-rated duct? A fire-rated duct should be made with an individual skin, having a total thickness not exceeding 2mm. This measurement consists of the intumescent coating, which happens to be important for improving fire resistance. Fire-rated ductwork is vital for maximizing the fire protection https://firesafe-fire-rated-ductw92234.bligblogging.com/40083817/fire-rated-ductwork-secrets