Packing is the process and/or the materials used in filling both service penetrations and building joints with backer materials as approved components within a firestop. == Purpose == Packing with inherently fire-resistive materials, such as rockwool or ceramic fibre is intended to protect sealants that would, on their own, be consumed by the fire.
Packing is the process and/or the materials used in filling both service penetrations and building joints with backer materials as approved components within a firestop. == Purpose == Packing with inherently fire-resistive materials, such as rockwool or ceramic fibre is intended to protect sealants that would, on their own, be consumed by the fire.
Source: Wikipedia "Packing (firestopping)" · CC BY-SA 4.0
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