Using good design principles can save energy, water and money, while creating a more enjoyable and comfortable home. All new homes, home renovations, alterations and additions need to comply with the 6-star standard in the National Construction Code. Go up just one star, however, and you will reduce your heating and cooling energy needs – and your energy bills – by 30 per cent.
When choosing a block for your home, make sure it will allow you to place the living areas where you spend the most time on the north side of the house. This will take advantage of the winter sun, keeping these rooms warm, light and bright. Avoid or minimise windows facing west or east and make sure they are well shaded for summer, and minimise south facing windows as these don't get any winter sun. Ask your architect or designer for advice about taking advantage of natural light.
Does your builder:
Insulating your existing ceiling, walls and floors during your building can save you up to 45 per cent on the cost of running your home. Insulation is a one-time cost that will last the lifetime of your house, provided it is installed correctly. Add as much insulation as possible and make sure that it is correctly installed without gaps or being compressed.
Designing zones in your home will allow you to efficiently heat and efficiently cool rooms individually. Doors are a great way to zone areas of your home, for example between corridors and bedrooms or living areas. This way you don't need to spend money heating or cooling rooms that you are not using. Sliding doors will be less effective as they have large gaps in the recess, which allow the air to flow freely. Choose the most energy efficient heating system and energy efficient cooling system to save energy and significantly reduce your energy bills.
Smarter window design and external shading can make your home bright and comfortable all year round. Double glazing, which has become less expensive, will reduce heat losses from your home, and reduce heat gain through your windows in summer. Energy efficient windows can reduce heat losses through the window by up to 50 per cent compared to a single glazed window.
Up to 25 per cent of winter heat loss from existing houses is caused by air leakage (also known as draughts). Make sure external doors and window closures are properly weather sealed, and use self-closing extraction fans and approved covers over any downlights. Wall penetrations should also be sealed during construction. Draught proof your home to save energy and money.
Sealing your home to reduce draughts means you need to provide adequate ventilation when and where necessary such as in the kitchen, bathroom, toilet and laundry. Exhaust fans and windows that can open are a good option, or if the house is very well sealed you might consider a heat recovery ventilation system. These systems provide a steady flow of fresh air but greatly reduce the need to heat or cool it each time.
Smarter lighting design and taking advantage of natural light will save you money on your ongoing energy bills. Check with your electrician to make sure the lights and any covers comply with Australian electrical safety requirements.
When choosing fridges, televisions, washing machines, dishwashers and so on, choose energy efficient appliances with the highest energy star ratings. Even if you pay a little more for these appliances they will save you money over time.
Save water by considering water recycling systems and choosing water saving fittings and appliances. Keep kitchens and wet areas easily updateable to allow for design, usage and technology changes.
Installing a solar PV system will allow you to generate renewable energy and reduce your electricity bills. A solar hot water system might be more expensive to buy and install, but the running costs will be significantly lower.
Over 75 per cent of construction waste is clean, excavated material, such as concrete, bricks and timber which can often be recycled. Ask your builder about waste minimisation strategy and documentation.
A Scorecard energy efficiency assessment will help you identify where your home is using the most energy, give it a Scorecard energy efficiency star rating, and suggest ways to make it more comfortable and more energy efficient to run. Whether you're selling, buying, renovating, looking to cut power bills or feel more comfortable in your home, Scorecard can help.
Learn about the National Construction Code and the regulations, codes and standards that will help you improve your sustainability.
Working with the right people is crucial to a successful building project. Make energy efficiency a priority when you choose your architect, building designer and other professionals.Read more
If you're building a home or undertaking a renovation, you might like to refer to our list of questions to ask your builder, architect or installer.Read more
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