What is the thickness of a fire-rated duct? A fire-rated duct ought to be made with just one pores and skin, using a complete thickness not exceeding 2mm. This measurement contains the intumescent coating, that is important for improving fire resistance. In accordance with the Environment Health Organisation (WHO), around https://fire-rated-insulation-for35688.iyublog.com/37673986/fire-rated-ductwork-for-dummies