Our H1 Services
We support builders, designers and homeowners with expert NZBC H1 compliance services tailored to today’s building standards. With decades of industry experience and a nationwide insulation network, our team provides in-house H1 compliance support, including free H1 Calculations. We can also provide cost-effective H1 Modelling for more complex builds. However, as this service is outsourced, we coordinate compliance through clear communication about costs.
Our Support Offerings
Fast, Tailored, H1 Calculations
We produce H1 Calculations in-house quickly and accurately using a full set of consent-ready plans. By incorporating your preferred solutions, specifications and project constraints, we tailor every calculation to achieve the best compliance outcome.
Our calculations can account for:
- Thermal comfort targets – Good/Better/Best
- Under-slab insulation requirements
- Glazing specifications
- Polyester or Glasswool insulation options
Calculations are typically completed within 5–7 working days, with expedited turnaround available when required.
Cost-Effective Compliance Solutions
H1 Calculations allow different building elements to work together to meet compliance requirements. This means more expensive solutions can often be offset by cost-effective alternatives elsewhere in the building envelope.
Because we understand both product supply and installation costs, we can help identify the most economical path to compliance by:
- Optimising insulation specifications
- Reducing reliance on expensive glazing upgrades
- Limiting unnecessary under-slab insulation
- Balancing performance across the entire building envelope
The result is a compliant solution that delivers better value for builders and homeowners.
Additional H1 Compliance Support
Our team can assist throughout the design, consent and construction process with:
- H1 compliance training
- Specification writing and reviews
- Pre-consent plan and specification checks
- Council RFI responses
- Installation sign-offs and reports
Whether you’re designing, consenting or building, we can provide practical support every step of the way.
Why Choose Premier Insulation
We are the only insulation supplier in New Zealand that:
- Manufactures and supplies both Glasswool and Polyester insulation
- Operates a nationwide installer network
- Provides real-world installed cost accuracy
- Maintains direct oversight of installation quality
- Offers some of New Zealand’s best-value insulation ranges
This unique position allows us to deliver H1 Calculations based on practical installation knowledge, helping you achieve compliant, buildable and cost-effective outcomes.
H1 Verification Methods
The H1 Energy Efficiency requirements provide two different compliance pathways – Calculation and Modelling methods – allowing designers to choose the approach that best suits their project.
Each method offers a different level of flexibility, from meeting prescribed insulation values through to balancing thermal performance across the entire building to achieve compliance and energy efficiency goals.
As of November 2025, the Schedule Method has been removed from the Building Code and is no longer an acceptable solution or verification method for H1 Energy Efficiency. Designers have a 12-month transition period, ending November 2026, to fully adopt the changes by that date. The change aims to improve clarity, flexibility, and affordability for designers, builders, and homeowners.
Calculation Method
The Calculation Method compares your proposed building to a reference building that meets the minimum H1 requirements. As long as the overall building performs as well as or better than the reference building, insulation levels can be adjusted between different building elements. For example, higher insulation in one area can offset lower insulation in another.
Key limitations:
- Glazing must not exceed 40% of the total wall area.
- Roof, wall and floor R-values must be at least 50% of the corresponding reference building R-values.
Modelling Method
The Modelling Method is used to assess the energy performance of a proposed building by using a simulation of the building to predict its space heating loads and cooling loads. This is compared with the space heating and cooling loads of a reference building that is the same shape, dimensions, and orientation as the proposed building, but has building elements with construction R-Values from H1/AS1. The Modelling Method requires highly detailed calculations that require certified software.
Premier Product Brochure
Download our new build brochure for our full range of polyester and glasswool insulation solutions.
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Ready to discuss your next project?
Anyone can obtain an H1 Calculation pass, but securing the best-value solution requires expertise in balancing costs and thermal performance. If price is your primary concern, we prioritise reducing window and slab R-Values to maximise your savings while maintaining compliance.
Experience how our expert support, tailored solutions, and guidance ensure smooth, compliant, and cost-effective H1 compliance from start to finish. We can write your specs to ensure consistency and with 20+ industry year experience, we can provide H1 Calculations and H1 Modelling methods for complex builds to achieve H1 Energy Efficiency. Since each house and commercial building has unique requirements based on size, design, and location, we can collaborate with you to achieve optimal results.
- Direct Supply, No Middleman
- Specification Support
- H1 Support
If you prefer to email us your plans directly, please send them to [email protected]. Our team will promptly review your submission and get back to you with a comprehensive insulation quote tailored to your specific needs.