Warm roofs place insulation above the roof deck to create a continuous thermal layer. This design reduces heat loss, manages condensation risk, and improves long-term durability and comfort in New Zealand conditions.
Cold-roof build-ups leave the deck cold and prone to interstitial condensation within the roof cavity. A warm roof relocates the insulation above the structural deck and beneath the waterproofing membrane, moving the dew point outside the structure. The result: a continuous thermal envelope with minimal thermal bridging, passive moisture control, and improved membrane life due to temperature stability.
Lower heat loss and more stable internal temperatures help reduce heating and cooling loads and support H1 energy-efficiency compliance.
Dew point shifted outside the roof build-up virtually eliminates cavity moisture and mould risk. No mechanical roof ventilation required.
No venting means fewer roof penetrations and a more robust waterproofing outcome.
Healthier interiors, improved durability, and lifecycle cost savings through reduced operational energy. (Widely used onGreen Star projects.)
A project-specific vapour barrier, rigid PIR or SOPRAROCK mineral wool insulation, and an Equus SOPREMA membrane. This light-weight assembly provides continuous thermal resistance (R-value) in line with NZBC requirements, with options to optimise for durability or budget.
Every warm roof project receives a Condensation Risk Analysis (CRA) and Wind Uplift Report to NZS1170.2, ensuring the build-up and fixings meet site conditions. BRANZ-appraised system pathways and documentation support consent and reduce RFIs.
Warm roofs stabilise internal temperatures and reduce energy demand, supporting lower operational carbon and Green Star outcomes. Eliminating condensation also protects the structure over time for a durable, low-maintenance roof.
Integrated technical support from design through installation, project-specific engineering, and a national network of certified applicators help ensure a compliant, high-performing warm roof on every project.
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