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What Is Condensation and Why Does It Occur?

Updated on
February 20, 2024

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What Is condensation and Why Does It Occur?

In this post, we will be discussing what condensation is, how it occurs in a home and the most frequent causes of condensation. By the end of this post, you will have a better understanding of the topic and will be able to prevent and troubleshoot condensation in your home. Thank you for reading.

What is Condensation?

Condensation is what occurs when airborne water vapour becomes liquid. It is the opposite of evaporation. If you notice condensation on any surfaces in your home - typically seen as droplets or fresh damp patches on surfaces - it's worth looking into the potential causes and take necessary action. Ventilation is key in this regard.

How Does Condensation Occur in a Home?

Condensation is a natural process that happens in virtually, if not literally, every home, year round - regardless of weather. The process happens when air is cooled to its dew point, or, so much water vapour is present in the air that the air - in simplistic terms - can't hold it all. If you're noticing water droplets accumulating on windows, ceilings, or walls, it's nearly certainly condensation.

What Causes Condensation?

Causes of condensation can broadly be split into two categories: behavioural and structural. Condensation is produced by simple daily activities, particularly if insufficient ventilation measures are not installed or utilised. Cooking, showering, drying clothes and indoor temperature control are a few amongst a multitude of behavioural causes that cause condensation, and if not addressed - mould. Condensation can also occur due to structural issues - such as penetrating damp or interstitial condensation - as a result of property damage. Feel free to explore these articles for further information. If the structure of the building is causing problems, this should be addressed ASAP

How to Prevent or Eliminate Condensation in a Home

Condensation can cause damage to your property. To prevent moisture damage, be sure to address condensation promptly. You can do so by using dehumidifiers, extractor fans and just plain old opening windows (which can actually be incredibly effective.) But do address it - moisture feeds mould. If left unchecked, consistent condensation and moisture issues will likely precipitate mould growth. We offer Mould & Moisture Surveys as part of our wider portfolio of mould remediation services. It goes without saying that indoor mould growth can cause both structural damage and damage to human health.


Condensation is a common occurrence in homes. It's important to understand why and how it happens. By understanding the causes and effects of condensation, you can take steps to prevent it from happening and prevent any issues, most notable indoor mould growth that may arise.