Guide 01 · Fundamentals
What Is Passive Fire Protection?
Passive fire protection is the part of a building’s fire-safety strategy that helps contain fire and smoke within defined areas. Unlike alarms or sprinklers, passive systems do not need to be switched on. They are built into walls, floors, shafts, joints, doors and structural elements.
The basic idea is compartmentation. A wall or floor may be designed to resist fire for a stated period, but every service opening through that construction can weaken the barrier. Fire stopping restores the intended separation around cables, pipes, ducts and joints.
What passive fire protection commonly includes
- Fire stopping around service penetrations.
- Fire-resistant shaft and service-riser enclosures.
- Linear joint and perimeter seals.
- Fire and smoke seals around suitable door assemblies.
- Intumescent protection for structural steel where specified.
- Inspection records and tested-system references.
Good passive fire protection depends on the complete installed system. Product selection, substrate, opening size, service type, depth, backing material and workmanship all affect performance. A recognised product on its own is not enough if it is installed outside the conditions of the relevant system.
A useful site question is: “Which tested or certified system is this installation based on, and where is that reference recorded?”
Guide 02 · Fire stopping
Service Penetrations: The Gaps That Matter
Modern buildings contain dense networks of electrical, plumbing, HVAC, data and fire-service lines. These services frequently pass through fire-rated walls and floors. Each opening creates a potential route for heat, flame and smoke unless it is properly sealed.
Common issues seen during inspection
- Unsealed annular gaps around pipes or cable bundles.
- Generic mortar or foam used without a suitable system reference.
- Changes to cable quantity after the original seal was completed.
- Missing identification labels and location records.
- Damaged seals caused by later MEP work.
- Mixed services installed in an opening not covered by the selected detail.
The correct solution depends on the barrier construction, the type and size of service, the size of the opening and the required fire performance. Combustible pipes may require a different approach from metal pipes, cables or ducts.
Coordination is therefore as important as installation. MEP teams should avoid repeatedly opening completed seals, and any later modification should be inspected and documented again.
Guide 03 · Audits
What a Passive Fire Audit Should Document
A passive fire audit should produce more than a list of defects. The report should help the building team locate each issue, understand the risk, decide the corrective action and verify closure.
A practical audit record should include
- Building, floor, room, shaft or grid location.
- Clear photographs showing the overall location and close-up condition.
- Barrier type and the service passing through it.
- Observed defect or deviation.
- Recommended corrective action.
- Priority or severity classification.
- Reference to the proposed tested or certified system where available.
- Closure photograph and sign-off after remediation.
Consistent naming and numbering make the report easier to use. A location code should match drawings, snag registers and completion records. This avoids confusion when the same type of penetration appears hundreds of times across a building.
An audit becomes most valuable when it is linked to a close-out process: identify, assign, rectify, reinspect and document.
Guide 04 · Steel protection
Intumescent Coatings for Structural Steel
Intumescent coatings are designed to expand when exposed to heat, forming an insulating char layer that slows the rise in steel temperature. The complete specification normally considers the steel section, required protection period, section factor, environment and compatible primer and topcoat.
Site quality is strongly influenced by surface preparation, approved coating build-up, dry-film thickness checks, curing conditions and repair of damaged areas. Records should identify where measurements were taken and whether the completed system matches the project specification.
Guide 05 · Shaft systems
Shaft Closing: Treat It as a System
A shaft enclosure is not only a board fixed over an opening. The framing, board type and layers, fixing centres, joints, perimeter details, access openings and service penetrations must work together. A change to one part can affect the intended performance of the complete assembly.
Before closing a shaft, coordinate all services and access requirements. After completion, record the location, system details and photographs so later maintenance teams understand what they are opening and how it must be reinstated.
Guide 06 · Handover
Why Installation Documentation Matters
Passive systems are often concealed above ceilings, inside shafts or behind finishes. Once the building is occupied, photographs and location records may be the only practical evidence of what was installed.
Good documentation supports quality checks, handover, maintenance and future alteration work. It should be simple enough for site teams to maintain and detailed enough for another person to identify the product, system and exact location without relying on memory.