What's the thickness of the fire-rated duct? A fire-rated duct ought to be built with just one pores and skin, aquiring a overall thickness not exceeding 2mm. This measurement involves the intumescent coating, which can be essential for enhancing fire resistance. Integrity – The flexibility of the duct or ductwork https://fire-resisting-ductwork-s56788.blogoscience.com/46135674/firesafe-fire-rated-ductwork-things-to-know-before-you-buy