How to Reduce Condensation in a Conservatory
By Ruth MacEachern
Product Manager
Jul 23, 2025
Condensation is a common issue in conservatories, especially during colder months. The unique structure and use of materials in conservatories make them particularly susceptible to the buildup of moisture on windows and other surfaces. This can lead to various problems, including mould growth, damp patches, and an overall less inviting space. However, with proper better ventilation, condensation can be effectively managed and the risk of mould reduced.
What causes condensation in conservatories
Condensation occurs when warm, moist air meets a cold surface. In a conservatory, the large areas of glass means that these cooler surfaces are abundant. Even with double glazing, on cold days, the temperature difference between the inside of the conservatory and the outside environment becomes more pronounced, causing moisture in the air to condense on windows and other surfaces.
Because most conservatories are isolated from the main heating and ventilation systems of the house temperature fluctuations at night can be large. Lower air temperatures reduce the amount of water vapour that the air can carry, and as a result, more condensation will form which is particularly noticeable in the morning.
How improved airflow can help
One of the most effective ways to reduce condensation in a conservatory is to improve the flow of air into and out of the space. Ensuring that air can circulate freely helps to balance temperatures and reduces the likelihood of moisture settling on cold surfaces.
On warm days, keep windows and vents open as much as possible to allow air to from outside enter and stale air to leave. This also helps to regulate the temperature during the day to reduce the amount of humidity that can build up and be released as condensation overnight.
If possible, keep doors between the conservatory and the main house open. This helps to integrate the conservatory with the rest of the home’s heating and ventilation system, promoting a more uniform temperature.
Whole house ventilation is an effective solution
Whole house ventilation systems, such as Positive Input Ventilation (PIV), can offer a long-term solution to condensation problems in your conservatory. PIV systems work by introducing a continuous supply of fresh air into the home. This dilutes and displaces moist air while the constant airflow helps to balance temperatures throughout the house, including the conservatory.
By evenly distributing air, PIV systems help to maintain a consistent temperature in the conservatory. This reduces the likelihood of cold surfaces that attract condensation.
Find out more
If you have discovered condensation in your conservatory, or are finding it uncomfortable to use year round, improving the ventilation in your home be the answer. Speak to a local EnviroVent specialist to learn more about our range of whole house ventilation systems and how they can help to improve airflow and help stop condensation and mould. Enter your postcode below to book a free home survey today.
