Packing (firestopping)

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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.

  • Ceramic fibre used as packing to support firestop silicone caulking.

  • "Canned" service penetration about to be firestopped.

  • Packing being installed.

  • Firestop caulking being applied.

  • Firestop has been tagged to identify certification information, thus enabling proper maintenance.

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. Lesser packing, such as foam backer rod or fibreglass are used simply to hold up materials that can survive fire testing on their own. In both cases, the packing is placed in such a way as to control the exact depth of the materials that top off the seal.

Special care

Proper packing is particularly important with self-leveling sealants. If the packing is not tight enough, the expensive caulking will drip out of the hole. If the packing surface is not straight enough, the thickness of the caulking will be wrong.

If firestopping takes place on plumbing pipes that have not yet been tested, packing can move the pipes and interfere with the plumbing. It is thus important for the work to be co-ordinated between plumbers and firestoppers.

See also

External links

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