The removal of the Schedule Method from NZBC H1 marks a decisive shift toward performance‑based design. Rather than relying on individual R‑values in isolation, architects, designers and builders must now demonstrate how the building envelope works together to deliver comfortable, energy‑efficient homes. While this change introduces new challenges, it also creates opportunities to design smarter, more resilient buildings — particularly when supported by proven systems and expert guidance.

Viking Roofspec has long advocated for a whole‑of‑building approach to thermal performance, and this philosophy aligns seamlessly with the updated H1 requirements. Instead of focusing solely on minimum compliance, Viking Roofspec systems are designed to enhance real‑world performance, helping buildings retain heat in winter, reduce overheating in summer, and deliver measurable long‑term value.

Warm roof technology sits at the centre of this approach. By positioning continuous insulation above the structure, Viking WarmRoof systems significantly reduce thermal bridging — one of the most common causes of heat loss in traditional roof assemblies. This uninterrupted insulation layer supports more accurate modelling outcomes and contributes to stable internal temperatures, improved occupant comfort, and reduced energy demand over the life of the building.

As H1 compliance increasingly relies on calculation and modelling methods, the role of suppliers has become more critical. Viking Roofspec supports project teams by providing clear, performance‑driven system data that integrates easily into energy models. This helps designers move away from overly complex assumptions and instead specify roof assemblies with confidence, knowing they are backed by tested solutions and practical experience.

Experience tells us that the level of support that architects and designers would expect from reasonable product suppliers to minimise risk while saving time, comes in the form of:

• Quality materials installed as ‘systems’ which will stand the test of time in NZ’s harsh climate
• Typical design details in appropriate formats; the details of which are practical and compliant
• Supporting documentation that demonstrates compliance such appraisals, certifications and engineering reports
• Professional markup advice of details prior to consented plans
• Masterspec Work Section Support requests

…and general service including sampling; and responsiveness to enquiry which almost goes without saying.

Importantly, Viking Roofspec understands that roofs do not operate in isolation. Achieving compliance under the new H1 framework requires coordination across windows, doors, walls, floors and skylights. Viking’s team works closely with architects and builders to ensure roof systems complement the wider building envelope, simplifying specification and reducing the risk of costly design revisions later in the process.

Ultimately, the new H1 settings encourage better outcomes — not just compliance on paper, but healthier, more comfortable homes in practice. By combining performance‑focused design, warm roof technology and expert technical support, Viking Roofspec helps the industry navigate change with confidence. The result is a simpler path to compliance, improved thermal comfort, and buildings that deliver lasting value well beyond the consent stage.