Achieving a 7-Star Energy Rating: How Bricks Make It Easy
With the updated National Construction Code (NCC) now requiring a 7-star energy efficiency rating for all new homes, many homeowners and builders are looking for practical ways to meet this standard without escalating costs.
The good news? Bricks make it simple. Thanks to their natural thermal properties and proven durability, brickwork can help you design an energy-efficient home that complies with the new regulations—while staying comfortable all year round.
What Is Thermal Mass and Why Does It Matter?
Thermal mass refers to a material’s ability to absorb, store, and slowly release heat. Bricks are renowned for their high thermal mass, which allows them to:
- Absorb heat during the day
- Release it slowly during cooler nights
- Reduce reliance on artificial heating and cooling
When used in combination with effective insulation, bricks can significantly reduce temperature fluctuations inside your home, creating a more energy-efficient and comfortable environment.
The Role of Thermal Breaks in Energy Efficiency
Thermal breaks are materials or gaps that reduce heat transfer between a home’s interior and exterior. This is where double brick construction really shines.
By maintaining a thermal break between inner and outer brick layers, you can:
- Minimise unwanted heat gain or loss
- Improve your home’s overall energy performance
- Reduce energy bills
Compared to lightweight construction materials, bricks naturally offer better thermal separation, making them ideal for meeting 7-star energy rating requirements.
Bricks and Thermal Lag: A Win for Climate Control
Thermal lag is the time it takes for external temperature changes to affect internal temperatures.
Bricks delay this heat transfer, helping to:
- Keep indoor temperatures stable
- Prevent overheating in summer
- Retain warmth in winter
This natural delay in temperature change means you’ll enjoy a more consistent and comfortable home climate, regardless of outside conditions.
Home Orientation: Simple Yet Effective
The orientation of your home can have a big impact on its energy efficiency. To optimise performance:
- Position living areas to face north (in Australia)
- Install eaves or external shading on west-facing windows
- Maximise natural light without overheating
Smart orientation reduces the need for artificial heating and cooling—helping you meet the NCC’s 7-star energy rating more easily.
Insulation and Brick: The Perfect Pair
Insulation is essential for any energy-efficient home, but bricks can reduce how much insulation you need.
Their thermal mass helps regulate internal temperatures naturally, so you can:
- Use less bulk insulation
- Lower construction costs
- Achieve your energy rating goals more efficiently
Windows: A Critical Energy Consideration
Windows can be a major source of heat loss or gain. To maximise efficiency:
- Minimise large, unshaded window areas
- Use double glazing where possible
- Add awnings, external blinds, or overhangs
These adjustments help you retain a comfortable temperature while maintaining natural light—contributing to an overall 7-star energy performance.
Ventilation: Passive Cooling That Works
Proper natural ventilation helps cool your home passively, reducing the need for mechanical cooling systems.
Good ventilation design:
- Promotes airflow
- Removes built-up heat
- Enhances indoor air quality
When combined with brick’s thermal performance, ventilation further supports your energy-efficient building strategy.
Build Better with Bricks
Achieving a 7-star energy efficiency rating is not only achievable—it’s easier with bricks. By leveraging their thermal mass, maintaining effective thermal breaks, and implementing smart design strategies, you can build a comfortable, compliant, and cost-effective home.
Think Brick Australia offers a range of helpful guides and factsheets to support your journey.
Visit: www.thinkbrick.com.au/technical/factsheets
