Why Do My Windows Get Condensation and Should I Worry?

If you’re seeing water droplets on your windows, the cause – and the solution – depends on which side it’s on. Here’s a quick guide:

Condensation Outside Your Windows

• A sign of highly efficient double or triple glazing.

• It means your windows are doing their job – keeping heat in.

• Happens when the outer pane stays cold and air outside hits dew point.

• Common on still, humid nights and usually clears as the day warms up.

Condensation Inside Your Windows

• Usually due to poor insulation or high indoor humidity.

• Warm, moist air inside hits a cold surface and condenses.

• Triggers: cooking, showering, drying clothes indoors.

How to Tackle Interior Condensation

• Open windows or use extractor fans during high-moisture activities.

• Avoid drying clothes indoors.

• Use a dehumidifier to lower indoor moisture.

• Keep curtains/blinds open to improve airflow near glass.

• Wipe windows regularly to avoid mould and frame damage.

What About Exterior Condensation?

• Harder to prevent – it’s a sign your windows are energy efficient.

• If persistent, try water-repelling coatings or gently wipe down in the mornings.

Takeaway: Interior condensation needs action – improve ventilation and reduce moisture. Exterior condensation? It’s just proof your windows are working well!