NZ Foam Warmcore is a high-performance insulation system designed for both walls and roofs. Combining closed-cell spray foam insulation with a carefully designed building assembly, Warmcore helps improve thermal performance, airtightness and overall building efficiency.
The system creates a seamless insulation layer that helps minimise thermal bridging and unwanted air leakage. The continuous foam layer also provides air and vapour control, removing the need for a separate internal vapour barrier. Built for high-performance construction, Warmcore supports more consistent indoor temperatures and reduced energy requirements.
Why Choose Warm core?
- No Requirement for additional vapor barrier
- Highest possible fire performance.
- World-class closed-cell spray foam insulation system – Warmcore
- Excellent R-Value performance – maximises thermal efficiency and return on investment.
- Bonds directly to the substrate, creating a continuous insulation layer and minimising thermal bridging.
- Environmentally conscious insulation system – no CFCs used in manufacture and uses over 20% recycled materials.
- Creates a seamless thermal envelope, reducing heat loss and unwanted temperature transfer.
- Achieves Homestar Gold rating – supporting high-performance, energy-efficient building design.
- Provides additional structural rigidity through its strong adhesion to the substrate.
- 50 Year Transferable warranty
- Supports high-performance building design, including Passive House.
- Easily incorporated into existing building plans during the early design stage.
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CodeMark certified and independently verified by Sustainable Engineering.
Why Change to Warm Core ?
Better thermal performance, a more comfortable building and a smarter approach to roof insulation.
See why more builders are choosing Warmcore for high-performance builds.
Watch VideoThe Warmcore roofing systems represent a strategic integration of 47 years of proven methodology and contemporary innovation, merging traditional roofing practices with the advanced thermal performance of modern Warm Roof systems. This solution delivers high energy efficiency without compromise, maintaining the building envelope’s integrity through carefully selected, performance-driven components.
Its application is highly versatile – equally suited to retrofit scenarios and new architectural developments—ensuring seamless incorporation into both existing roof structures and bespoke residential designs. The Warmcore Roofing systems not only adheres to robust performance standards but also supports cost-effective specification, offering tangible long-term value through reduced energy consumption and enhanced occupant comfort, all without sacrificing quality or aesthetic intent.
What cost would you put on Comfort ?
The Warmcore Roofing System is designed to deliver better thermal performance and a more comfortable building year-round.
Because comfort isn’t just a nice-to-have — it’s part of building better.
Watch Video
The Blower door test to prove it all.
The Warmcore system achieved an impressive 0.36 ACH50 blower door test result, demonstrating an exceptionally airtight building envelope. This measurable result highlights the effectiveness of the Warmcore system in reducing unwanted air leakage and helping maintain a more consistent indoor temperature.
Watch VideoFrequently asked Questions
Warmcore is a high-performance insulation system designed to help maintain comfortable indoor temperatures throughout the year.
NZ Foam offers Warmcore solutions for both walls and roofs. The wall system integrates with timber-framed construction, while the roof system places insulation above the roof structure to improve the building’s overall thermal performance.
By making insulation part of the wider building design, Warmcore gives homeowners, builders and architects another option for creating comfortable, energy-efficient homes.
Warmcore takes an integrated approach to insulation, focusing on maintaining indoor temperatures and reducing unwanted air movement through the building envelope.
In walls, the foam creates a continuous insulation and air-sealing layer when installed correctly. In roofs, insulation above the roof structure helps reduce temperature transfer through the roof and minimise thermal bridging.
For homeowners, this can mean more consistent indoor temperatures and less reliance on heating and cooling. For architects and builders, Warmcore offers another option when balancing building performance, construction details and project costs.
Warmcore can achieve different levels of thermal performance depending on the insulation thickness and application.
Indicative insulation R-values include:
- 50 mm: R2.20
- 70 mm: R3.08
- 100 mm: R4.40
- 150 mm: R 6.6
The appropriate insulation thickness will depend on the wall or roof design and the project’s thermal requirements. These figures relate to the insulation layer rather than the total R-value of the completed building assembly.
Warmcore is designed to work within specified wall and roof assemblies, with the potential to simplify some aspects of construction.
For example, the specified wall system does not require a separate vapour-control membrane behind the internal plasterboard when the complete system is designed and installed in accordance with its requirements.
For builders, this can mean fewer separate components to coordinate. For architects, it provides another option when considering thermal performance, construction detailing and overall project costs.
Maintaining comfortable indoor temperatures is important, but a well-designed building must also manage moisture properly.
Warmcore wall and roof systems need to be installed as part of a carefully considered building design. An assessment of the proposed Warmcore wall system highlighted the importance of protecting the building from wind-driven rain, managing moisture during construction and confirming the moisture resistance of the external plywood.
In practice, this means getting the building details right, protecting materials from the weather and allowing wet construction materials to dry before the building is enclosed.
Good design and workmanship are essential to ensuring the completed system performs as intended over the long term.
Whether you’re planning your own home or designing a project for a client, the insulation system you choose can make a real difference to indoor comfort, temperature control and energy efficiency.
Warmcore offers wall and roof solutions worth considering if you’re looking for a high-performance approach to insulation that forms part of the wider building design.
NZ Foam can help you understand the available options, discuss your project’s requirements and determine whether Warmcore is suitable for your design.
talk to our team about your next project.
Get in contact to find out more
To ensure the most accurate pricing for your project, we base our quotes on detailed plans. You can upload your plans through our quote form, allowing our team to review them in real time.
Warmcore systems
Truss roof system with plywood substrate, insulated with closed-cell NZ Foam Insulation for a seamless thermal barrier and enhanced energy efficiency.
Warm-core skillion roof system with timber rafters, fully insulated with closed-cell NZ Foam Insulation to maximise thermal efficiency and prevent moisture issues.
