Packing (firestopping)

This article does not cite any sources. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: "Packing" firestopping – news · newspapers · books · scholar · JSTOR (March 2015) (Learn how and when to remove this message)

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.

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.

• Firestop
• Mineral wool
• Annulus (firestop)
• Penetration (firestop)
• Fire test
• Passive fire protection
• Sealant
• Caulking
• Annulus (firestop)

• Packing as used in a patented firestop product patent
• Ward Manufacturing UL Listing, Item 4A is Packing Material for Firestop^{[permanent dead link‍]}