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Condensation

How to Clean Mould from Walls and Ceilings

By FixMyRoof Editorial Team 31 March 2026 2 min read Reviewed by a qualified roofer
All guides on FixMyRoof are reviewed by experienced roofing professionals to ensure accuracy. Our reviewers have a minimum of 10 years of hands-on industry experience.

Mould on walls and ceilings is a common problem in UK homes, particularly during the colder months. While it can look unsightly and affect your health, the good news is that it can usually be dealt with effectively.

## What Causes Mould?

Mould thrives in damp conditions. The most common causes include:
– **Condensation** from everyday activities like cooking, showering, and drying clothes indoors
– **Poor ventilation** in rooms such as bathrooms and kitchens
– **Roof leaks** that allow water to penetrate walls and ceilings
– **Rising damp** from ground level

## How to Remove Mould Safely

### Step 1: Protect Yourself
Wear rubber gloves, a face mask, and goggles before starting.

### Step 2: Prepare a Cleaning Solution
Mix one part white vinegar with one part water in a spray bottle. Alternatively, use a specialist mould removal spray.

### Step 3: Apply and Scrub
Spray the affected area generously and leave for 15 minutes. Then scrub with a stiff brush or cloth.

### Step 4: Rinse and Dry
Wipe the area with a clean damp cloth, then dry thoroughly.

## Preventing Mould from Returning

– Improve ventilation with extractor fans and trickle vents
– Use a dehumidifier in problem rooms
– Keep heating consistent to avoid cold surfaces
– Check your roof for leaks or damage

If mould keeps returning despite your efforts, it may indicate a deeper issue such as a roof leak. Consider getting a professional roof inspection.

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