Understanding Energy Efficiency and Roof Colour Choices

At Roof & Render SA, we understand that the choice of roof colour can be a hot topic (pun intended). Lately, we’ve seen some concerns about using dark COLORBOND® colours on roofs, with claims that they should be banned for energy efficiency reasons. We want to share some information to help you make an informed decision about your roof colour and energy efficiency.

What is Energy Efficiency?
Energy efficiency in homes refers to how well your home uses energy to maintain a comfortable living environment. In South Australia, energy efficiency standards are becoming stricter. Starting October 2024, new homes need to meet a higher energy efficiency rating, moving from a 6-star to a 7-star NatHERS rating.

How Roof Colour Impacts Energy Efficiency
The colour of your roof can influence your home’s energy efficiency. This is because different colours absorb different amounts of heat from the sun. Darker colours typically have higher solar absorptance (SA) values, meaning they absorb more heat. Lighter colours have lower SA values, reflecting more sunlight and keeping your home cooler in summer.

In warmer climates like South Australia, a roof with a lower SA can help keep your home cooler, potentially reducing cooling costs. However, if you prefer a darker roof colour, you can still achieve good energy efficiency with the right design and additional insulation.

The Benefits of COLORBOND® Steel
COLORBOND® steel offers a range of colours, including both light and dark options. Thirteen of the 22 core colours have an SA value that meets the new energy efficiency standards without additional measures. This means you have plenty of choices that can help keep your home cool and energy-efficient.

For those who love the aesthetic of darker roofs, COLORBOND® steel’s darker colours can still be used effectively. They may require additional insulation or other design measures to ensure your home meets the 7-star energy rating, but with the right approach, they can be both beautiful and efficient.

Enhancing Energy Efficiency with Additional Measures
At Roof & Render SA, we offer solutions to enhance the energy efficiency of your roof, regardless of its colour. Here are two key options:

Roof Blankets: These are insulation layers installed under your roof, helping to reduce heat transfer and keep your home cooler in summer and warmer in winter.

Solar Ventilation: This involves installing solar-powered roof vents that help remove hot air from your roof space, improving airflow and reducing the overall temperature inside your home.

Your Roof, Your Choice
Ultimately, the choice of roof colour is a personal one. We believe in providing honest advice and superior products to help you make the best decision for your home. Whether you choose a light or dark roof, we’re here to support you every step of the way. Our team can help you navigate the new energy efficiency requirements and ensure your roof not only looks great but also performs well.

At Roof & Render SA, we’re committed to delivering exceptional service and quality workmanship. If you have any questions or need advice on your roofing options, feel free to reach out. We’re here to help you create a beautiful, energy-efficient home that you can be proud of.

Contact us today to discuss your roofing needs and discover how we can assist you on your journey to a better, more efficient home.