Most local Tasmanians will tell you that keeping their family home warm in winter is more of a concern than keeping it cool in summer.
With a maximum outside temperature of 16°C and lower from Mid-April to Mid-October most of us like to keep our inside home temperatures at around 21°C or better... and there is the start to our winter condensation problems.
Condensation first appears on the edges of the windowpane, starting with the bottom edge. This is because windowpane edges are always colder than the middle of the glazed surface. This is characteristic of all insulation glazing, including energy efficient and is due to its structure.
With most new homes having on average 30 windows and glass doors then that creates a lot of opportunities for condensation to form.
And remember, condensation does not only form on windows and doors. Check behind wardrobes, check wall surfaces, check curtains and blinds and any other areas that feel damp or have become mouldy. That is a sign that condensation is occurring.
The major causes of condensation in the home is the combination of an increase in moisture content, water vapour, in warm air and a decrease in ventilation. Older homes "leaked" air through window frames and under doorways creating draughts and cross ventilation that would dry the moisture from the internal warm air. These days our homes are so well insulated that the modern home has become "airtight". More moisture retained, less ventilation, more chance of condensation.
MAJOR SOURCES OF WATER VAPOUR
cooking and boiling the kettle,
washing and drying clothes inside,
showers and baths,
evaporation from mopping floors, wiping down bench tops etc,
watering indoor plants.