Mould behind your wardrobe: why it happens and what to do

Mould behind a wardrobe is usually the result of a cold outside wall, a wardrobe pushed hard against it, and damp air with nowhere to go. The wall stays cold, the wardrobe traps the moist air against it, and the moisture settles on the back of the wood, the wall and anything stored inside. Pull the wardrobe out and the mould is often sitting right there.

Why it grows there

The back of a wardrobe is one of the coldest, least ventilated spots in a room. It's usually an outside wall, it sits in shadow, and it has a solid panel of wood or chipboard blocking the air. Warm air from the room can't reach the wall properly, so condensation builds up there over the winter.

Scottish homes can make this worse. Older houses and tenements often have thick walls that stay cold on the inside, and fitted wardrobes are common in flats built in the last few decades. Anything fitted tight against an outside wall is likely to be affected in a cold, wet spell.

Clothes and shoes

Mould doesn't only grow on walls. Clothes, shoes, bags and leather goods stored in the wardrobe can pick up spores and damp from the air, and the smell can build up quickly. Check the items in the wardrobe now, and look carefully at seams, the insides of shoes and the backs of coats. Our guide to mould on clothes and curtains covers washing them in more detail.

• Brush mould off outdoors, not indoors, so the spores don't spread.
• Wash washable items as the label says and dry them fully. Damp items going back in the wardrobe is how the problem repeats.
• Leather, suede and shoes may need a specialist cleaner. Don't store them until they are fully dry.
• Keep items loosely packed, with a gap between them, so air can move through.

What you can do this week

Empty the wardrobe, then pull it a few centimetres away from the wall if you can. That single change does more than most products. Leave the doors open for a day or two where it's safe to, so the inside dries out.

Once the wall is dry, clean any mould with a mould-killing spray and a damp cloth. Wear gloves, open a window, and let the area dry fully. Don't paint over it until the wall is dry and you've dealt with the cause. Then put the wardrobe back a little way off the wall, and keep the air moving in the room with the extractor fan or an open window when you can.

Use a moisture absorber in the wardrobe if the damp is severe, but treat it as a short-term help, not a fix.

When it's more than condensation

Condensation behind a wardrobe tends to be patchy, sits on an outside wall, and comes back each winter. Other causes show up differently:

• A tide mark or crumbling plaster low down on the wall can mean rising damp.
• A stain that grows after heavy rain, or sits below a gutter or downpipe, suggests penetrating damp.
• A patch that's always damp, with a musty smell that's worse than the room, may be a leak.

If the wall stays damp after you've moved the wardrobe and improved the airflow, get it checked properly.

Your health

The NHS says mould can trigger asthma in people who are allergic to it. If someone who sleeps or dresses in that room has asthma or a mould allergy, take the damp seriously and speak to your GP if breathing gets worse. The NHS asthma causes page sets out the triggers. Guidance for landlords in England from MHCLG, DHSC and UKHSA, Damp and mould: understanding and addressing the health risks for rented housing providers, goes further: it says everyone is vulnerable to the health effects of damp and mould, not only people with allergies.

When to get a specialist

Get a damp specialist to look if the mould keeps coming back, if it's spread to several walls, or if you think there's damp coming through the wall. Tell us what's happening and we'll pass it to one independent local specialist to visit and quote. It's free to ask.

Last checked 26 October 2026. This is general guidance, not legal or building advice.