Tips for a Mould Free Student House

Tips for a Mould Free Student House

February, 2021

This article provides tips for preventing mould in student accommodation, especially in rooms like bedrooms. It explains how condensation forms, what causes it, and how to reduce moisture through better ventilation and heating practices. The guide includes practical steps to keep mould at bay, ensuring a healthier and more pleasant living environment.

When temperatures drop in colder months, and we all spend more time indoors than normal, then we often see condensation mould starting to form in student properties. If you're not familiar with how condensation occurs and the damage it can do, please follow the advice within this blog to manage it and prevent more serious issues spoiling your experience of your second year university accommodation.


It's the appearance of water on cold surfaces. It occurs when moist air comes into contact with air or a surface which is at a lower temperature, e.g. windows, tiles and external walls. Whilst it may look harmless to begin with, it may result in mould growth and rotting of material.

The most basic example of condensation is breathing on a car window to make it mist up. Now imagine that on a larger scale, e.g. warm, moist air produced from showering forming on windows, ceilings and walls. If not managed properly, the condensation it produces will cause mould problems. This can happen in any property. In student houses, this is often caused by clothes being dried in bedrooms on racks or on radiators with the windows and door left shut. 


Condensation mould is normally found in the corners of rooms, and has a distinctive black or dark coloured pattern of speckling. Condensation mould can also grow quickly if ignored or not addressed. Example photos below where the problem has been not been addressed:

Condensation mould in a student propertyCondensation mould in a student propertyCondensation mould in a student propertyCondensation mould in a student property


On the coldest surfaces in your student house, so windows, ceilings and walls; especially if the wall is an external one.

It'll also form when furniture has been pushed too tight to a wall. Walls need to breathe too! Make sure there is a sufficient enough gap for air to flow between bed/chest of drawers/wardrobe and the wall.


Condensation mould can make the property less pleasant to live in and cause damage. To avoid unnecessary problems, it's important that you take steps to limit condensation build-up.


Produce Less Moisture

Some normal daily activities produce a lot of moist air very quickly. To minimise the amount of moist air, which leads to the formation of condensation, you need to:

  • Cover pans when cooking and don’t leave kettles boiling longer than necessary.
  • Switch on your cooker hood extractor fan when using your hob, if you have one available.
  • Dry washing outdoors. If it’s raining, use a clothes airer in the bathroom with the door closed and the window or fan open.
  • Do not dry washing directly on room radiators as this produces more water vapour and cools the room at the same time. Ask yourself “Where will all the water vapour from the drying clothes go?”
  • Run the cold water first when filling a bath as it prevents steam production.

Ventilate to Remove Moisture to the Outside

Your home can be ventilated without creating draughts by:

  • Keeping a small window open a little, or opening a window ventilator when the room is in use.
  • Opening the kitchen or bathroom windows to let steam and moisture out. 
  • After showering, use a squeegue to move all the water from the walls and shower screen and send it down the plug. Otherwise, it will evaporate into the air. Close the bathroom door after showering and leave a window open or the extractor fan on so the steam can escape outside
  • Use an extractor fan, they only use 1/5th the power of a 100watt bulb.
  • Ventilate your bedroom by leaving a window slightly open at night.
  • Closing the kitchen and bathroom doors when the rooms are in use to stop the warm moist air producing condensation in other cooler rooms.
  • Don’t clutter wardrobes and cupboards; it could stop the air circulating.
  • Don’t block ventilators, air bricks and chimneys.
  • Dry your windows & windowsills every morning
  • Don’t push beds and sofas against outside walls which are always colder and attract condensation. Make sure there is a 9 inch (25cm) gap. Bedding can get damp if air cannot circulate around it.

Heat your Home

Keep the heat on low all day in very cold weather, condensation is less likely to form in warm houses.


Yes, and they're not expensive either. Try products by Dettol or Astonish. You can also use warm water with a couple of drops of bleach or kitchen surface cleaner.

What Causes Mould in Bedrooms?

Mould in bedrooms is typically caused by a combination of poor ventilation, high humidity, and the presence of cold surfaces. Common sources of moisture include drying clothes indoors, inadequate heating, and insufficient airflow. When warm, moist air from activities like cooking, showering, or even breathing encounters cold surfaces such as windows, walls, and ceilings, it condenses into water droplets. This condensation can lead to the growth of mould, especially in areas with limited ventilation, such as behind furniture or in cluttered spaces. To prevent mould, it's crucial to reduce moisture production, improve ventilation, and maintain consistent indoor temperatures.


Yes, although condensation often incorrectly gets reported as "damp". Damp is caused by a structural defect with the property, rather than living conditions.

There are two types of damp: penetrating damp and rising damp.

Penetrating damp is caused by water entering the property through an external defect. Most commonly, it is caused by faulty guttering, downpipe or chimney stack, although it can occasionally be due to badly cracked or hollow render, or issues with the roof.

Rising damp exists when there is a problem with the property's damp proof course or membrane, causing water to rise from the ground into the walls or floor. It is visible as it leaves a tidemark on the affected walls. Photos of both types of damp below:

Damp in a propertyDamp in a property


At Tudor Price we make sure all our properties are kept in the best condition. See our range of student property to rent in Plymouth now!

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