Mould and condensation

What is mould?

Mould is the black fungus that can build up when there is too much moisture in a room. 

It is usually visible, but you can also often tell it's there by the musty smell it gives off.

Mould is often seen:

  • around windows
  • in the corners and edges of a room
  • behind wardrobes and cupboards

Mould can spread to clothes, shoes and bags if they are in a damp wardrobe. 

What causes mould?

Mould is caused by too much still moisture in the air. This can happen because:

  • the room is too cold
  • there is no free flow of air into and out of the room
  • condensation forms

Why is mould a problem?

Aside from being an eyesore, mould is a problem because it can:

  • cause health problems in children and vulnerable adults
  • irritate existing skin problems
  • ruin clothes and soft furnishings

Mould can spread quite quickly if nothing is done about it.

How to get rid of mould

The NHS website gives a range of helpful tips for getting rid of mould.

How to prevent mould

There are three things that together can help prevent mould from occuring:

  • reducing the moisture in the air
  • improving the air-flow
  • keeping the room warm

Reducing moisture

Condensation is the main cause of mould. This occurs when we do simple every-day activities, such as:

  • boiling the kettle
  • having a shower or bath

Even when we're asleep, people release a pint of moisture into the air.

If you find that your windows and walls have condensation on them, wipe them down with a cloth and wring it out. Do not put it on the radiator to dry as it will release the water back into the air.

Are you struggling with mould in your home?

If your home suffers from damp, mould or condensation, please let us know about it. We'll be able offer advice or book a repair if it's required.

Get in touch on 0800 218 2000 or email

condensation on a window

Here are some ways you can help to reduce the amount of condensation in your home:

  • keep a window ajar when possible
  • open windows on opposite sides of your home to let the air flow through
  • use extractor fans in the kitchen and bathroom if you have them
  • keep window vents open
  • dry washing outside if possible
  • make sure your tumble dryer is vented correctly
  • cook with the lids on the saucepans
  • if you're having a bath, put the cold water in first

Improving airflow

open window vent

Good ventilation means that the air can flow freely through a room. It stops wet air condensing on the walls and windows.

If you're cooking in the kitchen, open the window slightly. Do the same if you're having a shower or a bath.

Keep the rooms warm

It’s not always possible to keep windows open all the time, especially in the winter. 

If ventilation does not work on its own, you can use your home's heating to keep condensation at bay. 

It’s better to keep the heating on all day at a low level than putting it on in short bursts, especially in bathrooms and kitchens.

Use the thermostat to keep rooms at between 18 and 20 degrees. 

Do not warm a cold room by leaving the door open. Warm damp air will enter the room and condense on cold surfaces.

What about my energy bill?

If you find that your heating bill goes up, see if you can use better ventilation rather than heating to help tackle the condensation and try and find the right balance between ventilation and heating. 

You can use the valve on the radiator to reduce the heat in rooms that you do not use very often.

If you’re struggling financially to pay your heating bills, speak to your energy supplier in the first instance and they might be able to switch you to a better tariff.

The Salix Homes Income Management Team is also available to offer advice and support if you're struggling with the cost of your bills, rent and other expenses.

Contact us on 0800 218 2000 or email to access support. 


view of a radiator valve