Helping in hot and cold weather
The Scorecard is designed to assess how your house performs in both hot and cold weather. The Scorecard certificate provides recommendations to help you improve your house to deal with heatwaves and cold spells.
The Scorecard certificate includes a hot weather rating. An example is shown below.
The hot weather rating tells you how easy it is to keep your house cool during a heatwave, even if the power goes out, and suggests ways you could improve that performance.
The hot weather rating can help you prepare your home for heatwaves and for the possibility of power outages in summer. A house with a 'very easy' (4-5 blue squares) hot-weather rating will stay cool for longer, even if there is no air conditioning available.
The Scorecard certificate does not provide a specific cold weather rating. However, in cooler climates like that of Melbourne, the rating given for your home's building shell tells you how your house performs in the cold without heating. An example is shown below.
The building shell rating covers gaps and cracks in your exterior walls, insulation, the materials your walls, floors and ceiling are made from, and the size, placement and covering of your windows.
Improving your building shell rating will help keep your house warmer in winter without using the heater as much.
What they have in common
In winter or summer, you're aiming to keep the warm air where you want it. In summer, that's outside the house; in winter, it's inside.
The most important factor in where the heat stays is your building's shell. You can improve the way your house performs in both the cold and the heat by improving the weather tightness of that shell. Some ways of doing that are:
- upgrading insulation
- sealing gaps and cracks
- improving your window glazing or windows' external or internal coverings (such as curtains).
A Scorecard assessment will tell you which parts of your building shell could most benefit from improvements, and your accredited assessor will discuss with you what sorts of upgrades would best suit your home. If you make those improvements, you'll stay warmer in winter and cooler in summer without having to crank up the heater or the air conditioner.