Fire stopping is a form of passive fire protection. It seals openings in a building to stop fire, smoke and heat moving from one area to the next, creating fire-resistant compartments that help contain a fire where it starts.
Modern buildings carry a lot of pipework, ducting and cabling, and every point where these pass through a wall or floor is a potential weak spot. Correctly installed fire stopping keeps smoke and flames out of the rest of the building for longer, giving people more time to get out safely.