How to Get Rid of Mould in the Bedroom

Bedroom mould is one of the most common — and most unsettling — places to find it, because it’s where we spend hours each night. It’s almost always condensation, and very manageable once you know why. Here’s how to clear it and keep it away.

General guidance. If bedroom mould is widespread or keeps returning, get the cause checked. Health points are flagged — see is mould dangerous?

Why bedrooms get mould

Bedrooms are a perfect storm for condensation:

We breathe out moisture for hours overnight.
Windows are usually shut while we sleep.
The room is often cooler than living spaces.
Furniture against external walls blocks air and creates cold, damp surfaces.

The result is moisture settling on cold walls — in corners, behind wardrobes and beds — where black mould then grows. It’s condensation, not dirt.

Step by step: clearing and preventing bedroom mould

1. Clean the visible mould safely

With a mask, gloves and the window open, wipe mould off with a mould remover or mild detergent, then dry the area. (Full method: how to get rid of mould on walls.)

2. Improve ventilation

Open windows or trickle vents daily, especially in the morning, to clear the moisture built up overnight.

3. Move furniture off cold walls

Pull beds, wardrobes and drawers a few centimetres from external walls so air can circulate.

4. Keep a steady background warmth

Gentle, consistent heating keeps wall surfaces above the point where moisture condenses.

5. Reduce moisture sources

Don’t dry clothes in the bedroom, and address any underlying damp.

When it’s more than condensation

If mould persists despite these steps, or there’s an unexplained damp patch, there may be a building issue. An independent damp and mould surveyor can diagnose it.

Renting? A bedroom that grows mould under normal use points to a building problem, not your “lifestyle” — and your landlord is usually responsible. See your rights as a tenant.

Frequently asked questions

Why do I get mould in my bedroom?

Bedrooms are prone to condensation: we add moisture by breathing for hours overnight, windows stay shut, and the room is often cooler. That moist air settles on cold walls — especially behind furniture and in corners — and mould grows.

How do I stop mould in my bedroom?

Ventilate daily (open windows or trickle vents, especially mornings), keep a steady background warmth, pull furniture off cold external walls, and avoid drying clothes in the room. Clean any existing mould off first.

Is it safe to sleep in a room with mould?

Mould can affect health, particularly for children and anyone with asthma or allergies. It's best to clean small areas promptly and tackle the cause; for significant mould, deal with it before continuing to use the room heavily. See is mould dangerous?

Why is there mould behind my wardrobe?

Furniture against a cold external wall blocks air circulation, so that surface stays cold and damp — ideal for mould. Moving it a few centimetres off the wall usually helps a lot.