A July morning in Melbourne or Canberra can feel colder indoors than a January morning in Manchester, even though the outside temperature is often higher. The reason is the building, not the weather. This piece explains why so many Australian homes struggle in winter and what can realistically be done about it.
Houses built for summer
For most of the twentieth century, Australian houses were designed to get rid of heat rather than keep it in. Raised timber floors with open subfloors, high ceilings, wall vents and single-glazed windows all help a house breathe in summer. In winter, the same features let warmth escape almost as fast as you can produce it.
Insulation requirements came late. National energy efficiency rules for new homes only arrived in the early 2000s, and they have been tightened several times since. The current requirements sit in the National Construction Code, maintained by the Australian Building Codes Board, but they apply to new building work. A house from the 1960s or 1980s may have little or no wall insulation, a thin layer in the roof, and nothing under the floor.
Winters are milder, not mild
British arrivals often assume that Australian winters are an afterthought. In the tropical north they largely are. Further south they are not. Canberra and the tablelands get regular frosts, Hobart and much of Victoria have long, damp cool seasons, and even Sydney’s western suburbs can drop close to freezing overnight. The Bureau of Meteorology’s climate information lets you look up typical winter minimums for a suburb before you buy or rent, which is worth doing if you are choosing between areas.
The catch is that winters are just mild enough that many homes were never given proper heating. Central heating with radiators in every room, standard in British housing, is uncommon. Instead, you find a single gas heater in the living room, an old ducted system, or a reverse-cycle air conditioner (an electric heat pump that heats as well as cools) mounted high on one wall.
How it compares with a typical British home
The differences are easiest to see side by side. These are generalisations about older housing stock, and plenty of individual homes on both sides break the pattern.
| Feature | Typical older UK home | Typical older Australian home |
|---|---|---|
| Heating | Gas central heating, radiators in each room | One or two room heaters or a split system |
| Windows | Double glazing widely retrofitted | Mostly single glazing in aluminium frames |
| Floors | Solid or suspended, often carpeted | Raised timber with a ventilated subfloor, or an uninsulated slab |
| Wall insulation | Cavity fill common | Often absent in older brick veneer and weatherboard |
| Draughts | Usually sealed over time | Wall vents, gaps and open downlights are common |
Aluminium window frames deserve a mention on their own. Aluminium conducts heat very well, so the frame itself becomes a cold bridge, and condensation can run down the inside on winter mornings. That moisture is a frequent cause of mould around windows.
What makes the biggest difference
For owners, the order of priority is broadly the same as in Britain: stop the draughts, insulate the roof, deal with the windows, then improve the heating. Sealing gaps around doors, skirting boards and old exhaust fans is cheap and often surprisingly effective. Topping up ceiling insulation is usually the next best value. Underfloor insulation is worth considering on raised timber floors where there is crawl space to fit it.
Windows are more expensive to tackle. Heavy, well-fitted curtains with pelmets help a great deal, and secondary glazing or replacement double glazing are options where budgets allow. On the heating side, a modern reverse-cycle unit is generally much cheaper to run than plug-in electric heaters, and in many states government programmes have offered rebates for efficient heating. Check what is currently available in your state.
Some of the same changes also help in summer. Insulation and shading keep heat out as well as in, which is covered in more detail in our guide to heat-proofing an Australian home.
For renters
Tenants have fewer options, but not none. Some states, including Victoria, have introduced minimum standards for rental properties that cover things such as a fixed heater in the main living area. The rules vary by state and are changing, so check with your state’s tenancy authority. Otherwise, draught snakes, thick curtains, rugs and a portable oil-filled heater go a long way, and it is worth asking about heating when you inspect.
Questions readers ask
Are new Australian houses warmer?
Generally, yes. New homes must meet energy efficiency standards under the National Construction Code, which have been raised over time, though build quality and orientation still vary.
Why are my windows wet on winter mornings?
Warm, moist indoor air condenses on cold single glass and aluminium frames. Better ventilation, extraction in bathrooms and kitchens, and improved glazing all reduce it.
Is gas heating being phased out?
Some states, notably Victoria and the ACT, have moved to limit gas connections in new homes. Existing gas heaters can usually still be used, but check your state’s current policy before replacing one.