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Mould Behind Furniture – Common Cause of Wall Mould in Preston

Why Mould Forms Behind Furniture

If you’ve recently found black mould on walls behind wardrobes, beds, or sofas in your Preston home, you’re not alone. This is one of the most common condensation-related issues we see — especially during colder months.

The cause? Restricted airflow.

When furniture is placed tightly against a cold external wall, air can't circulate. Any moisture in the room (from breathing, cooking, bathing, etc.) becomes trapped between the furniture and the wall. The wall stays cold, condensation forms, and mould spores begin to grow.

What Makes It Worse?

Several conditions make this problem more likely:

No trickle vents or ventilation in the room
Single-glazed or poorly insulated external walls
High humidity from drying clothes indoors
Furniture pushed right up against the wall with no space for airflow

How to Prevent Mould Behind Furniture

✅ Leave a 5–10 cm gap between furniture and the wall
✅ Use rooms with trickle vents and keep them open
✅ Install proper mechanical ventilation (such as extractor fans or a PIV unit)
✅ Keep background heating on to avoid cold surfaces
✅ Don’t block radiators or vents with furniture

These small changes can make a big difference in controlling condensation and stopping mould in its tracks.

When to Call a Specialist

If mould keeps returning or has spread to plaster, woodwork, or ceilings, it’s best to get a professional survey. At Weather Wise Solutions, we don’t just treat the visible mould — we find the cause and fix it for good.