Fire stopping and alterations

Who checks the fire stopping after cables or pipes are added?

Adding a cable or changing a pipe can affect an existing compartment seal. The work order should identify who checks the affected construction, who specifies and completes the fire stopping, and who records the outcome. Do not let that responsibility fall between the service contractor and the building team.

Include fire stopping in the alteration scope

Before work begins, ask whether the route crosses a fire-resisting wall, floor or other compartment boundary. Existing drawings and installation records can help, but uncertain construction may need investigation. List both new openings and existing seals that may be disturbed. Include a named responsibility for the fire stopping and its inspection in the order, even when the primary job is electrical, plumbing or data cabling.

Affected compartment boundaries identified
New and disturbed openings included in the scope
Responsibility for sealing and inspection agreed

Review the changed arrangement

An existing labelled seal is not automatic permission to add any service through it. Check the installed system and whether its evidence accommodates the changed service type, size, opening and construction. Manufacturer details may also address service supports, spacing and permitted future additions. Where the existing system cannot be identified, seek a competent assessment rather than assuming a patch with a similar-looking material is suitable.

Existing labels and records reviewed
Changed service arrangement checked against applicable evidence
Unidentified systems referred for technical review

Choose the detail before filling the opening

A product name or headline fire rating does not define every application. Select the applicable system detail for the wall or floor and the services present. Do not mix products or modify an arrangement without supporting evidence. Larger openings, extra cables or different pipe materials may require a different solution. If the proposed condition falls outside available details, obtain a suitable technical resolution rather than improvise a repair.

Suitable detail selected for the actual condition
Compatible products and permitted arrangement confirmed
Technical queries resolved before installation

Inspect before finishes are closed

Arrange the check while the location is accessible. Keep the service contractor, fire-stopping installer and person closing the ceiling or boxing informed of the inspection point. Photographs should show the location and useful installation detail, rather than only an unidentifiable finished surface. Record any area that could not be checked and agree its next action. A tidy finish alone does not establish performance.

Inspection point agreed with other trades
Location-linked photographs taken before concealment
Uninspected or inaccessible areas remain open actions

Update the building record

File the new work against the existing location reference, or create one where none exists. Record the change, installed system, relevant detail, installer, date and applicable completion documents. Update marked-up plans and any affected action schedule. If a later contractor modifies the same location, the record should help them establish what was installed and what must be reviewed before disturbing it again.

Record linked to the service alteration and location
Product, detail and completion information retained
Drawings or registers updated for future work

Next steps

Relevant services and guidance

Continue with the FireX service, sector or location information most relevant to your building.

Original sources and further reading

General guidance

This article is general information, not legal, fire-engineering or product-design advice. Follow the building fire strategy, current official guidance, tested system evidence and competent professional advice.

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