What's the thickness of the fire-rated duct? A fire-rated duct ought to be built with a single pores and skin, getting a complete thickness not exceeding 2mm. This measurement includes the intumescent coating, which happens to be important for enhancing fire resistance. Our solutions have detailed Directions to guidebook you https://fireresistantductworkinst24455.techionblog.com/39597013/the-basic-principles-of-fire-rated-insulation-for-ductwork