What is the thickness of a fire-rated duct? A fire-rated duct needs to be made with a single pores and skin, using a whole thickness not exceeding 2mm. This measurement contains the intumescent coating, that is important for improving fire resistance. According to the Globe Wellness Organisation (WHO), all around https://fire-resisting-ductwork-s34555.blogozz.com/38273356/the-basic-principles-of-firesafe-fire-rated-ductwork