Fireblock

Fireblock Definition

Fireblock is material installed at the time of construction to slow down or stop the migration of undetected flames and gas to other areas of the structure through concealed spaces.

Explanation

Fireblocking interrupts the spread of fire from one building compartment to another through openings for utilities made in walls, ceilings, and roofs.

A fireblock is not a firestop. Firestops are materials required by building codes and are tested and rated for the ability to stop fires from spreading. Fireblocks are not tested or rated.

The International Building Code (IBC) specifies acceptable fireblock materials.

The dimensions and location determine configuration of the fireblock, but these must also meet state codes that specify configuration for fireblock locations and installation.

IBC approved materials for use in fireblocks include wood panels, cement fiber or gypsum board, loose fill insulation, and blankets or batts of glass fiber or mineral wool.

Putty, caulk or another sealant can be used as fireblocks for smaller openings and areas around pipes, vents and ducts.

State, county and local building codes specify approved procedures and materials for use in constructing fireblocks. They use the IBC as a foundation for the requirements.