Fire Stopping Installation

Fire stopping seals gaps and openings in fire-resistant walls, floors, and barriers where services, pipes, and cables pass through.
Fire stopping maintains the fire compartmentation that contains fire and smoke, giving occupants time to escape the building.
Incorrect or missing fire stopping allows fire and smoke to spread rapidly through service risers, voids, and between floors.
Fire stopping products include intumescent sealants, wraps, collars, pillows, boards, and mortar applied to specific designs.
Only fire stopping products tested and certified for the specific penetration type and barrier construction may be used.
Third-party certified installers ensure fire stopping is fitted correctly — installation quality directly determines fire performance.
Every fire stopping installation must be inspected, photographed, and documented before being concealed behind finishes.
The Grenfell Tower fire inquiry highlighted the catastrophic consequences of inadequate fire stopping in building construction.
Fire stopping must be reinstated after any service modification, addition, or removal that breaches the fire barrier.
Building control and fire engineers inspect fire stopping at critical hold points — failed inspections require rework.

Compartmentation failure	A single missing fire stop allows fire and toxic smoke to spread between compartments, cutting off escape routes.
Product specificity	Fire stopping products are tested for specific applications — using the wrong product for the barrier type provides no protection.
Grenfell lessons	Inadequate fire stopping contributed to the rapid fire spread at Grenfell Tower — correct installation saves lives in every building.

Do

Don't

Use only certified fire stopping products tested for the specific penetration and barrier.
Engage third-party certified installers for all fire stopping work on the project.
Inspect and photograph every fire stopping installation before concealing with finishes.
Document all fire stopping locations and product types for the building records.
Reinstate fire stopping whenever services are modified after the original installation.
Follow the manufacturer's installation instructions precisely for each product type.
Present fire stopping at building control hold points for inspection and approval.
Brief all trades that fire barriers must not be breached without reinstatement.
Maintain fire stopping records as part of the building's fire safety documentation.
Check that the correct product is being used for each specific application.

DON'T use uncertified products or products not tested for the specific application.
DON'T allow unqualified installers to carry out fire stopping work.
DON'T conceal fire stopping before it has been inspected and photographed.
DON'T omit fire stopping documentation — it is essential for the building's fire record.
DON'T leave breached fire barriers unsealed after service modifications.
DON'T deviate from the manufacturer's instructions during fire stopping installation.
DON'T bypass building control hold points — fire stopping must be inspected and approved.
DON'T allow trades to penetrate fire barriers without awareness of reinstatement duties.
DON'T lose fire stopping records — they prove the building's compartmentation integrity.
DON'T assume one fire stopping product works everywhere — each application is specific.

See also: Fire Safety Awareness on Site | Fire Safety in Occupied Buildings

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