NCC Version:
NCC 2022, Volume 1, Amendment 1
Area of NCC Requirements:
Section J – Energy Efficiency
- J1.3 Roof and ceiling construction
- J1.5 Roof lights
- J1.6 Roof lights – additional requirements
- J1.7 Roof and ceiling construction – additional requirements
- J1.9 Sealing of openings
Problem:
The design of the data centre includes a highly serviced roof with multiple penetrations for platforms, condensers, walkways, and fall protection systems. These features interrupt the continuity of insulation and make full compliance with the Deemed-to-Satisfy (DTS) provisions under Section J unachievable. Without a compliant approach, the building risks failing to meet required energy efficiency standards.
Solution:
To address this challenge, a Performance Solution was developed using the JV3 Verification Method. This modelling-based approach assesses the total energy performance of the building, allowing trade-offs between different elements of the building fabric and services. In this case, reduced roof insulation was balanced by improvements to other areas such as wall systems, glazing, and mechanical efficiency, ensuring that the building performs at or above the level required by the DTS pathway.
Finalised Report:
The final modelling demonstrated that the proposed design meets or exceeds the performance of a compliant reference building, in line with Performance Requirement JP1 of the NCC. The solution is fully documented, supported by expert analysis, and has been endorsed by relevant consultants and stakeholders as an acceptable pathway to compliance.