Reducing Condensation and Mould Problems in Your Bathroom
By Ruth MacEachern
Product Manager
Jul 09, 2025
Bathrooms are one of the most moisture-prone areas in any home, and without proper ventilation, humidity levels can get extremely high causing condensation and providing the ideal environment for mould to thrive.
There are steps you can take to reduce the amount of persistent moisture in the air in your bathroom and by combining this with improved ventilation, you can reduce condensation levels and prevent mould from becoming an unsightly problem.
Reducing the amount of water vapour in your bathroom
When you bathe or take a shower, steam released by the hot water saturates the air in your bathroom and if it is not removed, it will settle as condensation of surfaces such as walls and painted ceilings where it can soak through into the underlying plaster and create damp patches where mould will grow.
By reducing water temperatures, you can reduce the amount of steam that is released into the air during showers. Similarly, if you start to fill the bath with cold water before adding hot water to bring it up to temperature, the water spends less time at its hottest temperature, and you can also save a little bit of money on your energy bills.
Preventing water vapour escaping into the rest of your home
Remember that your bathroom isn’t the only place where high humidity can lead to condensation and mould. Make sure that you close the door of your bathroom when taking a shower or bath. This prevents steam from escaping into other rooms where the condensation problem may be harder to spot and allow mould to start growing out of sight.
Improve bathroom airflow to reduce humidity
To reduce the amount of water vapour present in your bathroom, it is important to allow air to circulate. Simply opening a window during your bath can be helpful, but to keep humidity levels at the right level to stop condensation, additional ventilation is necessary.
Bathroom extractor fans
The simplest way to reduce moisture in the bathroom is with an extractor fan. Models such as the EnviroVent Cyclone 8 have been designed to provide sufficient airflow to remove water vapour before condensation has the chance to form and feature humidity sensors that adjust fan power to remove the water vapour as quickly as possible.
Extractor fans create negative air pressure in your bathroom, which means that the humid air cannot escape into other parts of your home, and this helps to prevent condensation occurring out of sight.
Extractor fans with heat recovery
Your bathroom is one of the warmer rooms in your home, and you may be concerned about heat loss with an extractor fan, as the warm air is removed and blown outside.
The EnviroVent HeatSava is a single room heat recovery extractor fan which collects the warmth from the air that is expelled from the bathroom and uses it to heat incoming air which reduces energy loss and makes your home more efficient and helps to lower your overall energy bills.
Whole house ventilation Systems
Positive input ventilation systems (PIV) such as EnviroVent ATMOS can also be retrofitted into most homes. These systems draw air into the property from outside to displace the humid air that builds up in your bathroom or shower.
These systems are highly efficient and provide a whole house solution to condensation that helps to stop water vapour from your bathroom escaping and causing problems in other rooms.
Find out more
Problems with condensation in your bathroom because of poor airflow can lead to expensive damp repairs and unhealthy mould growth. Book a free home survey from your local EnviroVent specialist. They can visit your home and provide advice about the most suitable ventilation system to solve your condensation problems,
