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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 A firestop or fire-stopping is a form of passive fire protection that is used to seal around openings and between joints in a fire-resistance-rated wall or floor assembly. Firestops are designed to maintain the fire-resistance rating of a wall o ...
. Image:Ceramic_fibre_nelson_clk_installation.jpg, Ceramic fibre used as packing to support firestop silicone caulking. Image:Pack_seal_1.jpg, "Canned" service penetration about to be firestopped. Image:Pack_seal_2.jpg, Packing being installed. Image:Pack_seal_3.jpg,
Firestop A firestop or fire-stopping is a form of passive fire protection that is used to seal around openings and between joints in a fire-resistance-rated wall or floor assembly. Firestops are designed to maintain the fire-resistance rating of a wall o ...
caulking Caulk or, less frequently, caulking is a material used to seal joints or seams against leakage in various structures and piping. The oldest form of caulk consisted of fibrous materials driven into the wedge-shaped seams between boards on w ...
being applied. Image:Pack_seal_4.jpg, Firestop has been tagged to identify certification information, thus enabling proper
maintenance Maintenance may refer to: Biological science * Maintenance of an organism * Maintenance respiration Non-technical maintenance * Alimony, also called ''maintenance'' in British English * Champerty and maintenance, two related legal doctrine ...
.


Purpose

Packing with inherently fire-resistive materials, such as rockwool or ceramic fibre is intended to protect
sealant Sealant is a substance used to block the passage of fluids through openings in materials, a type of mechanical seal. In building construction ''sealant'' is sometimes synonymous with ''caulking'' and also serve the purposes of blocking dust, s ...
s that would, on their own, be consumed by the
fire Fire is the rapid oxidation of a material (the fuel) in the exothermic chemical process of combustion, releasing heat, light, and various reaction Product (chemistry), products. At a certain point in the combustion reaction, called the ignition ...
. Lesser packing, such as
foam Foams are materials formed by trapping pockets of gas in a liquid or solid. A bath sponge and the head on a glass of beer are examples of foams. In most foams, the volume of gas is large, with thin films of liquid or solid separating the reg ...
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 A hole is an opening in or through a particular medium, usually a solid body. Holes occur through natural and artificial processes, and may be useful for various purposes, or may represent a problem needing to be addressed in many fields of en ...
. If the packing surface is not straight enough, the thickness of the caulking will be wrong. If firestopping takes place on
plumbing Plumbing is any system that conveys fluids for a wide range of applications. Plumbing uses pipes, valves, plumbing fixtures, tanks, and other apparatuses to convey fluids. Heating and cooling (HVAC), waste removal, and potable water delivery ...
pipe Pipe(s), PIPE(S) or piping may refer to: Objects * Pipe (fluid conveyance), a hollow cylinder following certain dimension rules ** Piping, the use of pipes in industry * Smoking pipe ** Tobacco pipe * Half-pipe and quarter pipe, semi-circula ...
s 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

*
Firestop A firestop or fire-stopping is a form of passive fire protection that is used to seal around openings and between joints in a fire-resistance-rated wall or floor assembly. Firestops are designed to maintain the fire-resistance rating of a wall o ...
*
Mineral wool Mineral wool is any fibrous material formed by spinning or drawing molten mineral or rock materials such as slag and ceramics. Applications of mineral wool include thermal insulation (as both structural insulation and pipe insulation), fil ...
*
Annulus (firestop) {{unreferenced, date=March 2015 The annulus, or annular space, is the space between a penetrant and whatever surrounds it, such as the sides of an opening or a sleeve A sleeve ( ang, slīef, a word allied to ''slip'', cf. Dutch ) is the part ...
*
Penetration (firestop) A penetration, in firestopping, is an ''opening'', such as one created by the use of a cast-in-place sleeve, in a wall or floor assembly required to have a fire-resistance rating, for the purpose of accommodating the passage of a mechanical, elec ...
* Fire test *
Passive fire protection Passive fire protection (PFP) is components or systems of a building or structure that slows or impedes the spread of the effects of fire or smoke without system activation, and usually without movement. Examples of passive systems include floor- ...
*
Sealant Sealant is a substance used to block the passage of fluids through openings in materials, a type of mechanical seal. In building construction ''sealant'' is sometimes synonymous with ''caulking'' and also serve the purposes of blocking dust, s ...
*
Caulking Caulk or, less frequently, caulking is a material used to seal joints or seams against leakage in various structures and piping. The oldest form of caulk consisted of fibrous materials driven into the wedge-shaped seams between boards on w ...
*
Annulus (firestop) {{unreferenced, date=March 2015 The annulus, or annular space, is the space between a penetrant and whatever surrounds it, such as the sides of an opening or a sleeve A sleeve ( ang, slīef, a word allied to ''slip'', cf. Dutch ) is the part ...


External links


Packing as used in a patented firestop product patent

Grainger Firestop Packing

Ward Manufacturing UL Listing, Item 4A is Packing Material for Firestop
{dead link, date=March 2018 , bot=InternetArchiveBot , fix-attempted=yes Passive fire protection Firestops