Guide
Passive Fire Separations NZ
Passive fire separations are a critical part of building safety in New Zealand. They help contain fire and smoke, protect escape routes and maintain the fire rating of walls and floors when services pass through them.
This guide explains what passive fire separations are, where they fail, what compliant fire stopping should achieve and what building owners, contractors and facility managers need to look for.
Contain fire and smoke
Fire separations are designed to slow the spread of fire and smoke between firecells and critical building areas.
Protect rated elements
Walls, floors and service risers can lose performance if openings are not correctly treated with tested systems.
Support proper installation
Passive fire work must suit the substrate, service type, annular gap, fire rating and tested system requirements.
Improve documentation
Good records make future inspection, maintenance, remediation and compliance tracking far easier.
Overview
What is a passive fire separation?
A passive fire separation is a construction element that helps stop fire and smoke spreading from one part of a building to another.
In practical terms, this usually means fire-rated walls, floors, ceilings, shafts and barriers that form part of a building’s fire safety strategy.
These separations are often penetrated by building services such as electrical cables, data, plumbing, HVAC, pipework and containment. Once a rated element is penetrated, it must be treated correctly so the required fire resistance is maintained.
A passive fire separation is not just the wall or floor itself. It also includes the way penetrations, joints, edges and openings are sealed and maintained over time.
Common examples
- Fire-rated plasterboard and concrete walls
- Fire-rated floor slabs and slab penetrations
- Riser shafts and service cupboards
- Fire stopping around pipes, cables and cable trays
- Head-of-wall and perimeter joints
- Remedial work to damaged or altered fire stopping
Why it matters
Why passive fire separations are important
Passive fire separations are there to preserve compartmentation and help a building perform the way it was intended in a fire event.
Life safety
They help protect occupants by slowing fire and smoke spread and preserving safer escape paths for longer.
Property protection
Good compartmentation can reduce the spread of damage between tenancies, levels and building zones.
Compliance support
Passive fire defects are regularly identified during audits, maintenance reviews and building compliance checks.
Long-term building records
Accurate records help future owners, facilities managers and inspectors understand what has been installed and where.
Common problems
Where passive fire separations usually fail
Most failures happen after the building is in use, when services are added, altered or left incomplete.
Unsealed penetrations
Openings left around new pipes, cables or conduits can compromise the fire rating of the wall or floor.
Wrong products or systems
Using a product without the correct tested application, substrate or service condition can create a non-compliant result.
Poor workmanship
Incorrect depth, backing, packing, annular gap control or fixing details can reduce system performance.
Damage after installation
Later trades, maintenance teams or service upgrades often disturb existing fire stopping without reinstating it properly.
Missing identification and records
Without photos, schedules or system records, it becomes difficult to verify what was installed and maintain it later.
Unclear scope between trades
Passive fire work is often missed when service penetrations are created by multiple subcontractors across a project.
What good looks like
What compliant passive fire work should achieve
Good passive fire installation is not just about filling a hole. It is about matching the right tested system to the actual site condition and installing it correctly.
That includes the fire-rated element, the service type, the service size, the substrate, the opening dimensions and the required fire resistance.
It should also be documented clearly so the work can be understood, checked and maintained over the life of the building.
Key outcomes
- Correct system selection for the actual site condition
- Installation aligned with tested details and manufacturer guidance
- Suitable fire rating for the building element
- Clear photos and location-based records
- Remedial work completed where defects exist
- A usable register for future maintenance and compliance
Documentation
Typical passive fire documentation
Documentation is a big part of passive fire quality and ongoing building management.
Penetration records
Schedules and location references help identify what was installed, where it was installed and what services were involved.
Photos and marked up plans
Photo evidence and drawing references make future audits, remedial work and contractor coordination easier.
System and product information
The installed fire stopping should be traceable to the intended system and relevant supporting information.
Handover and maintenance support
Building owners and facility managers benefit from clear records that can be used for future inspections and changes.
BPFI
How BPFI can help
We help identify, install, document and remediate passive fire separation work across commercial, multi-unit and mixed-use buildings.
Installation
Passive fire installation for service penetrations, wall openings and floor penetrations.
Remedial work
Rectification of damaged, missing or altered passive fire stopping in existing buildings.
Registers and records
Documentation support including photos, schedules and practical handover information.
Project support
Help for contractors, owners and building managers who need practical passive fire guidance.
FAQ
Frequently asked questions
What is a passive fire separation?
A passive fire separation is a fire-rated wall, floor, ceiling or barrier designed to slow the spread of fire and smoke between parts of a building.
What happens when a fire separation is penetrated?
When pipes, cables, ducts or other services pass through a fire-rated element, the opening must be sealed with a tested passive fire system that restores the required fire resistance.
Are passive fire penetrations a compliance issue in New Zealand?
Yes. Damaged or non-compliant penetrations can affect building compliance, maintenance records, BWOF outcomes and the overall fire safety performance of the building.
What documents are usually needed?
Typical documentation may include marked up drawings, penetration schedules, product details, installation records, photos, fire stopping register information and producer statement support where required.
Who should inspect passive fire separations?
Inspection should be carried out by competent passive fire professionals who understand tested systems, substrate conditions, fire ratings, installation details and project documentation requirements.
Need help with passive fire separations?
Talk to BPFI about installation, remedial work or documentation support.
If you need help with passive fire penetrations, fire stopping defects, records or project support, get in touch and we can point you in the right direction.