How to prevent condensation build up on double glazed windows during winter? 

During winter, the inside of a home is heated but the outside of the house remains cooled by the cold outside air. When humidified air comes into contact with any cold surface, such as a window, wall or ceiling, it cools down. As a result, moisture from the warm air forms condensation on the cold surface, turning into mould and rust. Mould, left untreated, can lead to allergies and asthma.

There are 3 main causes of condensation:

  1. Outside temperature: The temperature difference between inside the house and outside the house causes surfaces to damp (condensation).
  2. Inside room temperature: Different rooms throughout a house can vary in temperatures.
  3. Water vapour content of the air: This is caused by everyday household activities such as washing and cooking. For example, you have probably experienced walking into a small room when a clothes dryer is operating. The room is humid compared to the rest of the house.

How to Avoid Condensation on Windows?

There are things you can do to prevent condensation in your home. Double-glazing is a good place to start.

Install double-glazing to prevent condensation year round

Humidity in the home doesn’t just happen during winter. Clothes dryers and hot showers can increase indoor humidity and lead to condensation.

Double-glazing traps air between two sheets of glass, which creates an insulating barrier. The insulating barrier prevents the transfer of air temperature, which causes condensation. Double-glazing doesn’t control the vapour in the air but instead acts as a heat barrier providing an inner pane, which is warmer than the outer pane.

How to Reduce Condensation in the Home

Along with double-glazing, there are simple strategies you can follow to reduce condensation in the home throughout the year.
They include:

  • Leaving doors open inside your home can promote air circulation and prevent any one room becoming too humid
  • Make sure after showering or drying clothes to keep the closest door open until the air returns to normal temperature
  • Turn on the exhaust fan in the bathroom upon each use. This will reduce the moisture in the air
  • Keep the area near double glazed windows as warm as possible to help prevent condensation build-up
  • Engage in the services of a professional home inspector to ensure any cracks are identified and the problem can be addressed