EBOSS April - Mammoth and Lower Pitch Roofing

Designing roof insulation has become more nuanced with recent updates to the NZ Building Code around H1, particularly as architects and builders balance thermal performance, structural constraints, and cost. Two of the most common challenges - working with shallow rafters and accommodating low pitch truss roofs - can seem limiting at first, but with the right approach, both can be addressed efficiently without compromising overall building performance. Understanding how insulation build-ups interact with roof geometry is key to achieving compliance while maintaining practical, buildable designs.

This is where Mammoth Insulation plays a critical role. By combining flexible polyester insulation solutions with practical design support, including H1 calculation and modelling services, Mammoth enables smarter insulation strategies tailored to each project. Whether navigating tight rafter depths or optimising insulation at roof edges, the focus remains on delivering reliable thermal performance, reducing thermal bridging, and supporting cost-effective construction outcomes.

Read our latest EBOSSNow story on how Mammoth insulation can help designers achieve strong thermal performance while still meeting H1 requirements.

News: 7 April 2026