Thoroughly encapsulated in aluminium foil for cleaner set up and resistance to grease or moisture ingress in services Ordinarily, all ductwork was once fabricated from steel. It required remaining encased in the fire protection process when passing through a compartment wall or flooring with no help of the fire damper, https://fireratedductworth78899.ziblogs.com/37100923/the-smart-trick-of-fire-rated-insulation-for-ductworth-that-no-one-is-discussing