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How is energy efficiency assessed?

Written by Clayton Bielby

Updated at March 31st, 2025

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Answer:
Energy efficiency is assessed through a NatHERS energy report, which calculates the expected energy use of your home based on climate zone, layout, materials, and window design.

The assessment includes:

  • Wall, floor, and ceiling insulation performance
  • Window placement, size, and double glazing
  • Dwelling orientation and shading
  • Roof colour and ventilation
  • Sealing of doors and openings
  • Natural lighting and thermal mass

All Expandify homes are engineered to meet a minimum 7-star energy rating, and the report is completed by a qualified energy assessor before certification. It is a mandatory part of the NCC approval process.

Expandify includes the energy report in the report pack for all Complete Package projects.

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