Fire stopping is an essential element of fire protection in building construction, designed to prevent the passage of fire, smoke, and heat through breaks in fire-resisting walls and floors. According to the British Standards, particularly BS 476 and BS EN 1366, fire stopping systems must be tested and rated to specific fire resistance levels. These standards guide the selection and installation of materials such as firestop sealants, collars, and boards, ensuring they meet the necessary performance criteria. Compliance with BS 9999 and the building regulations also emphasizes the importance of effective fire stopping in safeguarding both life and property, requiring thorough inspection and maintenance to uphold the integrity of fire barrier systems throughout a building's lifespan.