Our homes should feel good to live in. Comfortable, efficient, and not costing a fortune to keep warm in winter or cool in summer.
But when it comes to renovations, sustainability often gets tangled up with expensive upgrades and high-tech solutions. In reality, the best changes are the simple ones.
Better insulation, window tinting, and low-VOC paints can help regulate temperature, improve air quality, and shrink your energy bills. Small tweaks, big impact.
Here’s how to make your home more energy-efficient, one smart upgrade at a time.
1. Upgrade Your Windows with Low-E Tint or Double-glazing
Windows are one of the biggest culprits for heat loss in winter and overheating in summer. The fix? Smarter glass. Investing in low-emissivity (Low-E) tint or double glazing can significantly improve your home’s thermal efficiency.
- Low-E tint is a microscopic coating that reflects infrared heat while allowing visible light to pass through, keeping interiors cool in summer and warm in winter without darkening rooms like traditional window tints. Low-E coatings can reduce heat loss by up to 30% in winter.
- Double glazing consists of two panes of glass with a sealed air or gas-filled space between them, acting as insulation to reduce heat transfer and keeps things cosy inside. Low-conductivity gas fills (such as argon) further enhance efficiency. Double glazing can cut heat loss by up to 50% compared to single-pane windows.
- Secondary glazing. If replacing all your windows isn’t an option, adding a second layer of glazing to existing windows is a cost-effective alternative that still boosts insulation.
By minimising heat transfer, these window upgrades cut down on the need for artificial heating and cooling, Lowering energy costs and reducing emissions. Planning a redesign? Consider bay windows. They flood interiors with natural light, reducing reliance on artificial lighting while adding a dash of architectural charm.
2. Insulate Like You Mean It
Proper insulation is one of the best ways to keep a home comfortable year-round while slashing energy bills. There’s more to it than fibreglass batts, though, so consider these options:
- Sheep’s wool: Naturally breathable, it absorbs moisture and helps regulate humidity. Plus, it has a higher thermal resistance (R-value) than traditional fibreglass.
- Cellulose insulation: Made from recycled paper, it’s one of the most eco-friendly options and has high thermal performance. The Insulation Council of Australia and New Zealand (ICANZ) rates cellulose as comparable to fibreglass but with superior sustainability credentials.
- Hempcrete: A mix of hemp, lime, and water, this insulation superstar is carbon-negative, meaning it actually absorbs more CO₂ than it emits during production.
- Spray foam: Highly effective at sealing gaps but often contains chemicals. Opt for water-based formulas with minimal VOCs where possible.
Before upgrading, check your home’s NatHERS energy rating to identify problem areas. Ceiling and wall insulation should be top priority, but don’t forget underfloor insulation if you’re in a raised house.
3. Switch to Low or No-VOC Paints
Traditional paints release volatile organic compounds (VOCs), which contribute to indoor air pollution and can trigger respiratory issues. Low and no-VOC paints offer the same durability and colour depth without the nasties.
- Water-based formulas are your best bet – brands like BioPaints, Ecolour, and Haymes offer non-toxic, eco-friendly options. The traditional paint brands – think your Dulux and Taubmans now offer Low and no-VOC paints for indoors and outdoors.
- Natural mineral-based paints (like limewash) are another great alternative, adding texture while improving air quality.
- Look for certifications like GECA (Good Environmental Choice Australia) or Global Green Tag to ensure products meet sustainability standards.
4. Consider Energy-Efficient Appliances and Fixtures
While insulation and materials play a big role, the every day appliances can contribute significantly to your home’s energy footprint.
Before upgrading, check for energy ratings. The more stars, the better. Some of the best swaps include:
- Heat pump hot water systems: Use up to 70% less energy than traditional electric systems. Your Home Australia reports that heat pump systems are among the most efficient hot water options available.
- Induction cooktops: More energy-efficient than gas and electric coils, with better temperature control. According to CHOICE, induction cooktops use about 10% less energy than traditional electric stoves.
- LED lighting: Uses 75% less energy and lasts 25 times longer than incandescent bulbs.
- Smart thermostats and timers: Automate heating and cooling to run efficiently without waste, with options like Google Nest and Ecobee offering intuitive energy-saving features.
