What's the thickness of a fire-rated duct? A fire-rated duct should be built with a single pores and skin, getting a complete thickness not exceeding 2mm. This measurement consists of the intumescent coating, which is important for improving fire resistance. Based on the Entire world Wellbeing Organisation (WHO), all over https://fire-rated-ductwork45567.onesmablog.com/5-essential-elements-for-fire-resistant-ductwork-manufacturers-80399125