Many older buildings in Auckland fail fire inspections not because of major structural issues, but because of complex service penetrations that were never properly fire-stopped.
In these buildings, multiple services such as plumbing, electrical, and data cables are often grouped together through fire-rated walls and floors. While this may have been acceptable at the time of construction, it creates serious compliance issues under current passive fire protection standards.
For building owners, property managers, and contractors, this often leads to:
- Failed BWOF inspections
- Unexpected remedial costs
- Delays in compliance sign-off
Understanding why this happens and how to fix it properly is critical.
Why Mixed Service Penetrations Are a Problem
Passive fire protection systems are designed and tested for specific conditions. Most fire-stopping products — like fire collars, sealants, and wraps are only compliant when installed exactly as tested.
In older buildings, service penetrations are rarely simple.
Instead of a single pipe or cable passing neatly through a wall, you’ll often find:
- Multiple services tightly grouped together
- Irregular or oversized openings
- Non-standard layouts that don’t match tested systems
This makes it difficult and often impossible to apply standard fire-stopping solutions in a compliant way.
Why Standard Fire Collars and Sealants Often Don’t Work
A common assumption is that installing fire collars or sealant will solve the issue.
However, this approach can quickly become non-compliant.
The problem is:
- Manufacturers do not test products for every possible combination of services
- Mixed service penetrations fall outside standard tested configurations
- Applying products outside their tested scope invalidates compliance
As a result, even well-intentioned installations may fail inspection.
A Proven Approach: Bulkheads and Fire-Rated Boxes
To address complex penetrations in older buildings, one of the most reliable and commonly adopted solutions is the construction of bulkheads (fire-rated boxes) around the services.
These are typically:
- Framed using steel or timber
- Lined with fire-rated plasterboard
- Built around the penetration zone
The purpose of this approach is simple:
Create a controlled, compliant environment where individual fire-stopping systems can be applied correctly.
Instead of trying to seal a messy cluster of services, the bulkhead:
- Separates services into manageable penetrations
- Replicates a tested wall or ceiling system
- Allows compliant fire-stopping to be installed per manufacturer specifications
This ensures the final installation meets New Zealand Building Code requirements and relevant AS/NZS standards.
Real-World Example
In the image below, a bulkhead box has been installed around a service penetration in a concrete slab.
This solution:
- Contains the penetration within a fire-rated enclosure
- Allows proper fire-stopping at the point of entry
- Brings the installation back into a compliant, testable condition
This type of solution is commonly used in Auckland buildings where original service layouts don’t meet modern compliance expectations.
Why This Matters for Auckland Buildings
Auckland has a large number of older commercial and multi-use buildings that were constructed before current passive fire standards were fully understood or enforced.
Today:
- Fire inspections are more thorough
- Compliance expectations are higher
- Documentation and proof of system performance are required
This means previously overlooked issues, particularly mixed penetrations, are now being flagged.
Without the correct solution, these issues can:
- Prevent BWOF sign-off
- Delay projects
- Create liability risks for owners and contractors
Why You Need a Specialist in Passive Fire Protection
Resolving these issues isn’t just about installing products it requires:
- Understanding fire-rated systems and test evidence
- Assessing site-specific conditions
- Applying solutions that are both practical and compliant
At Halt Fire, we specialise in identifying and resolving complex passive fire issues in Auckland buildings — particularly where standard solutions don’t apply.
Need Help With a Failed Inspection or Compliance Issue?
If your building has:
- Failed a fire inspection
- Mixed service penetrations
- Unclear or non-compliant fire-stopping
We can help.
We provide practical, compliant solutions tailored to your building, not generic fixes.
Get in touch with Halt Fire for a professional assessment and a clear path to compliance.