09/11/2026
As the nights get colder you may start to notice condensation on your windows, but why is it there? 💧
"Condensation means your windows are broken or of poor quality"
Truth: Surface condensation on the inside or outside of a window usually means warm, humid indoor air is meeting a cold surface. It is a sign of humidity and temperature differences, not a product defect. You should only start to worry if you notice condensation between the panes, this means the seal has gone.
"Trickle vents just let the cold air in, so you should keep them shut"
Truth: Trickle vents at the top of windows allow damp, moisture-laden air to escape without cooling down your whole room. Keeping them closed traps moisture inside, which actually makes condensation and mould worse.
"Only old homes get window condensation"
Truth: Modern, well-insulated, and airtight homes often experience more condensation than older drafty houses. Older homes leaked air naturally, whereas modern sealed homes trap indoor moisture from cooking, showering, and breathing.
If you start to notice condensation on your windows, your not doing anything wrong. If you notice the condensation is between the panes of glass, it might be time for an upgrade. Find out more about the windows we offer here: https://bit.ly/4fRueRZ