Some of our KOROK team members, including our Systems & Sustainability lead, recently visited NZ Steel’s Glenbrook site for a look behind the scenes at their game-changing Electric Arc Furnace (EAF) project.

This innovative project will replace two coal-fuelled rotary kilns at the Glenbrook steel mill, reducing NZ Steel’s carbon emissions by over 45%. The EAF will use renewable electricity and recycled scrap steel instead of coal, cutting NZ Steel’s carbon emissions by around 1 million tonnes a year  – that’s about 1% of New Zealand’s total emissions!

The project, supported by the New Zealand Government through the GIDI Fund, is expected to be operational by mid-to-late 2026, marking a significant milestone in New Zealand’s decarbonisation journey.

It was great to see this innovation up close and discuss how these advancements align with our own sustainability goals at KOROK.

The Ravenscroft Fire and Smoke Damper has been carefully engineered to seamlessly integrate with high performance KOROK wall systems. Preventing the spread of both fire and smoke between building compartments, preserving the barriers integrity for up-to two hours.

The Ravenscroft Fire Damper for KOROK is a combined balancing and fire damper. The damper can easily be tested and preset with the indicator handle from outside the duct. Duct access panels are not required. The Ravenscroft Smoke/Fire Damper for KOROK is a combined fire and smoke damper. The damper can easily be tested by pressing the centre of the thermo-electric tripping device. Flexible ductwork connectors must be used to separate rigid ducting from the damper. These prevent excess force being transferred to the wall mounting in the advent of ductwork deformation or collapse during a fire or earthquake.

Available sizes

125 | 150 | 175 | 200 | 250 | 300 | 400mm (125 and 175 available by request)

Designing townhouses, apartments, and terraced housing is always a balancing act. On one hand, you need to ensure absolute compliance with fire and acoustic separation standards. On the other, you’re under pressure to keep the build practical, efficient, and cost-effective. The systems you specify can either make that process seamless – or create unnecessary challenges. That’s why more architects are turning to KOROK® Fire and Acoustic Wall Systems

Why Architects Choose KOROK® in Residential Projects

Confidence in fire and acoustic performance is at the heart of KOROK®. Every system has been thoroughly tested, BRANZ-appraised, and designed to meet New Zealand’s strict compliance requirements. For residential projects, this reliability gives peace of mind – whether you’re working on attached homes or a multi-level apartment complex.

Equally important is speed. KOROK® panels are lightweight, pre-finished, and engineered with a steel shell and aerated concrete core. This reduces the need for multiple linings and accelerates installation, keeping builds moving forward and helping architects see their designs realised without compromise.

KOROK® also makes detailing simpler. The systems are straightforward and practical, allowing you to integrate fire and acoustic separation into your plans without excessive complexity. This ease of design translates into fewer site issues, ensuring a smoother construction process overall.

And then there’s sustainability. With panels that can be reused across projects, KOROK® helps reduce construction waste throughout the building lifecycle. For architects working to meet client expectations and growing environmental standards, this makes it a solution that balances performance with responsibility.

Designed for Residential Intertenancy

From terraced housing to multi-level apartments, KOROK® Intertenancy Systems are designed to integrate seamlessly into residential projects. They provide the reliable fire and acoustic separation you need, while also reducing time spent on problem-solving during construction.

Supporting Architects Beyond the Build

KOROK® goes further than supplying systems. Through CPD-accredited presentations, we provide architects and specifiers with practical knowledge that can be applied directly to projects – all while earning valuable CPD points. It’s one more way we support your professional growth alongside delivering building solutions.

A focused manual outlining approved penetration seals using Promat products with KOROK® walls, supported by BRANZ Test Report FR10185-001-02.
What you’ll find inside:

• BRANZ-approved solutions for service penetrations

• Promat’s expertise in structural protection, compartmentation, fire stopping, and ductwork systems

• Robust, tested solutions for challenging project requirements

Download the PROMASEAL® Service Penetrations Manual with Promat

This technical guide provides a comprehensive overview of Hilti’s passive fire protection systems tested and assessed for use with KOROK® intertenancy and fire-rated wall systems. Developed to support designers, engineers and contractors, this document consolidates key firestop solutions that tested in accordance with AS 1530.4 and assessed in accordance with AS 4072.1 and are compliant under the NZBC Clause C for service penetrations in KOROK® walls.

Hilti’s firestop products are engineered for performance, tested for compliance, and supported by international approvals and local assessments. Each system outlined in this guide has been selected based on its compatibility with KOROK® wall (51mm and 78mm) configurations and its ability to maintain fire resistance ratings across a wide range of service types, including:

• Power and data cables
• PVC, PEX, and metal pipes
• Cable bundles and conduits
• HVAC services
• Structural steel and linear gaps

This guide includes:

• A system index for quick navigation
• Detailed tables of tested configurations
• Installation notes and performance ratings
• Reference to relevant test reports and approvals

When machinery is operating at high intensity, the noise can be just as intense as the output. Whether it’s recycling, manufacturing, or any high-impact industrial process, managing sound is not just a comfort issue – it’s a health, safety, and productivity one.

At KOROK, we understand the challenges that come with acoustic performances. That’s why our fire and acoustic wall systems are engineered to offer more than just compliance – they’re built to perform under pressure, especially when sound control is critical.

Real-World Results in Raglan: Xtreme Zero Waste

A great example of this in action is our recent project at the Xtreme Zero Waste Recycling Center in Raglan.

The challenge? Containing the loud crashes and clinks from their glass recycling facility – an essential part of their operation, but not the easiest on the ears.

Our solution was simple but effective: construct a purpose-built enclosure using KOROK fire and acoustic panels – essentially a “box” that wrapped around the recycling machinery to absorb and block the sound.

The result? Immediate improvement.

“The box looks awesome and works well,” the Xtreme team told us. It’s now a noticeably quieter and more comfortable environment for staff and visitors alike.

Why KOROK Panels Work for Noisy Machinery

KOROK wall systems are purpose-built for industrial environments, offering high acoustic performance to reduce machinery noise, along with fire resistance for added safety. Their durable construction ensures reliable performance under pressure, while the modular design allows for tailored solutions—from full enclosures to partitions. Plus, they deliver a clean, professional look, as demonstrated in real-world applications like Raglan.

For facilities like Xtreme Zero Waste, acoustic control isn’t just a luxury – it’s essential to keep workers safe, comply with council noise regulations, and maintain good relationships with surrounding communities.  So, if you’re facing excessive noise from machinery, get in touch. We’ll help you design a system that keeps the sound where it belongs – inside the box.

Interested in acoustic solutions for your facility?

As New Zealand’s population ages, demand is growing for retirement and aged care facilities that deliver comfort, safety, and peace of mind. That’s where KOROK® Fire and Acoustic Rated Wall Systems come in – designed to meet the unique demands of healthcare and retirement village construction.

Why KOROK is a Smart Choice for Retirement Living:

See KOROK in Action

Metlifecare Gulf Rise – Red Beach, Auckland

Metlifecare Gulf Rise in Red Beach is a standout example of modern retirement living — open, connected, and community-focused. With architectural input from Warren and Mahoney (Stage 1), Ignite Architects (Stages 1–4 of Precinct Two), and landscape design by Boffa Miskell, the project is a masterclass in designing for wellbeing and longevity.

KOROK proudly supplied our fire and acoustic wall systems throughout the development, helping deliver on the vision of safe, peaceful, and efficient living for older New Zealanders

• Read the Case Study →

Summerset St John’s – Auckland

Summerset St John’s Retirement Village represents the pinnacle of modern retirement living—where luxury, location, and lifestyle converge. Set in Auckland’s eastern suburbs with sweeping views and proximity to beaches, cafes, golf clubs, and key amenities, it offers an unmatched standard of comfort and care.

KOROK is proud to have played a vital role in ensuring the safety, acoustic comfort, and performance of this flagship development by supplying our fire and acoustic rated wall systems across key areas of the project.

• Read the Case Study →

Ready to future-proof your next retirement project?
Get in touch with our team for system recommendations, CAD files, and technical support.

KOROK: There’s No Substitute for Tested Performance

Fire & Acoustic Wall Systems Trusted in Healthcare. KOROK® is a proven fire and acoustic wall system that delivers key performance benefits for healthcare construction. Hospitals demand the highest standards in safety, acoustic control, compliance and speed of delivery. KOROK delivers – with BRANZ-appraised, tested systems that are already trusted in hospitals, corridors, IT rooms, service risers, lift shafts, and more

Engineered for IL3/IL4 Resilience: Seismic Performance and Rapid Remediation Design

As the ultimate All-in-One solution for fire & acoustic-rated wall systems, KOROK® panels offer unmatched performance for high-importance structures. With strong seismic performance and the ability to withstand high drift limits, KOROK® panels are ideal for IL3 and IL4 buildings, such as hospitals, emergency response centres, and essential utilities. By undertaking this seismic testing, KOROK® reinforces its commitment to superior building resilience, helping to minimize damage, lower repair costs, and maintain operational continuity after earthquakes.

Core Benefits That Deliver Certainty in Fire, Acoustic, Seismic, and Programme Performance

All-in-one Solution for all Fire and Acoustic Rated Walls, Engineered for Complex Healthcare Builds

One system, multiple applications. From intertenancy walls to lift shafts, risers, ducts and corridors. KOROK panels provide comprehensive protection throughout your entire project.

LIFT SHAFTS

SERVICE RISERS & DUCTS

CORRIDORS & HALLWAYS

INTERTENANCY WALLS

STAIRCASE & ESCAPE PATHS

PLANT ROOMS & IT ROOMS

Save Time. Save Labour. Reduce Risk.

Need more info or want to present this to a client? We can help

At KOROK, we know that healthcare projects are high-stakes environments, with no room for delays, compliance issues, or uncertainty. That’s why we offer KOROK 360, a full-circle support package developed to give you confidence from concept to completion. Whether you’re in early-stage design or managing construction on site, KOROK 360 provides targeted, hands-on support tailored to your needs

Ready to Spec KOROK?

Let’s lock it in, and get your project moving with tested, proven performance. Whether you’re working on early-stage design, refining your specification, or needing trusted fire and acoustic systems that meet healthcare demands – we’re here to help. Get expert guidance, fast documentation, and the confidence that comes from working with systems already trusted in hospitals across New Zealand.

Talk to us today and bring KOROK certainty to your next healthcare build.

Paul Carrigan
Specification Manager
📧 paul@korok.com | 📞 0800 KOROK NZ

Andrew Hawkins
Specification Manager
📧 andrew@korok.com | 📞 0800 KOROK NZ