Mould on internal walls is one of the most common household problems in the UK — and one of the most dangerous if left untreated. Beyond the unpleasant smell and unsightly black patches, mould can trigger respiratory issues, damage your home, and reduce property value. With recent UK surveys showing mould at a five‑year high, more homeowners than ever are searching for reliable ways to remove it safely and prevent it from returning.
This comprehensive guide walks you through why mould forms, how to remove it properly, which Amazon products work best, and how to stop mould coming back for good.
How Common Is Mould in UK Homes? (Latest Statistics)
Mould is far more widespread than most people realise. Recent UK data shows:
- Around 2 million people in England live in homes with significant damp and/or mould, representing 3–4% of all residences.
- In the two years to March 2023, 4% of households in England had damp in at least one room.
- The English Housing Survey 2023–24 found 5% of homes suffered with damp, marking a five‑year high.
- A 2025 Uswitch report revealed that over 60% of people have experienced mould in their homes, up from 58% the previous year.
These numbers highlight a growing national issue — and a clear need for effective mould‑removal solutions.
Why Mould Appears on Internal Walls
Before you remove mould, it’s essential to understand why it forms. Mould thrives in damp, poorly ventilated environments. The most common causes include:
- Condensation
Warm indoor air hits cold walls, causing moisture to settle. This is the number one cause of mould in UK bedrooms and living rooms. - Penetrating Damp
Rainwater entering through damaged brickwork, guttering, or pointing. - Rising Damp
Moisture travelling up from the ground due to failed damp‑proof courses. - High Humidity
Cooking, showering, and drying clothes indoors all increase moisture levels. - Poor Ventilation
Blocked vents, closed trickle vents, or lack of airflow.
Once moisture is present, mould spores multiply quickly — often within 24–48 hours.
Is Mould Dangerous?
Yes. Mould exposure can worsen or trigger:
- Asthma
- Allergic rhinitis
- Respiratory infections
The UK Health Security Agency links mould exposure to increased respiratory disease burden across England.
This is why removing mould quickly — and correctly — is essential.
How to Get Rid of Mould on Internal Walls (Step‑by‑Step)
Below is the safest and most effective method for removing mould from internal walls.
Step 1: Protect Yourself
Mould spores can irritate the lungs and skin. Wear:
- Gloves
- A mask
- Eye protection
- Old clothes
Open windows for ventilation.
Step 2: Choose the Right Mould‑Removal Product
Not all mould removers are equal. Bleach‑based sprays work fast but don’t always kill mould at the root. Gel‑based removers cling to walls and penetrate deeper.
Here are Amazon‑recommended products that perform exceptionally well:
⭐ Polycell Mould Remover Spray (500ml)
Price: £9.20
Seller: Amazon UK
Why it’s great:
- Powerful fungicide
- Ideal for mould‑prone areas
- Fast‑acting spray
This is a strong all‑rounder for general wall mould removal.
⭐ LTP Mouldex (500ml)
Price: £15.87
Seller: Amazon UK
Why it’s great:
- Clings to surfaces
- Removes mould, algae, and moss
- Excellent for grout, silicone, and damp corners
Perfect for bathrooms, kitchens, and stubborn mould patches.
⭐ Lakeland Blitz That Mould Remover (750ml)
Price: £4.99
Seller: Amazon UK
Why it’s great:
- Professional‑strength formula
- “Spray on and walk away”
- Works on tiles, grout, and window areas
A budget‑friendly but powerful option.
⭐ Deuvuo Mould Remover Gel
Price: £14.99
Seller: Amazon UK
Why it’s great:
- Bleach‑free
- Eco‑friendly
- Clings to vertical surfaces
- Ideal for deep‑rooted mould
Great for households wanting a low‑odour, non‑acidic solution.
⭐ Large‑Capacity Mould Remover Gel (200ml)
Price: £5.99
Seller: Amazon UK
Why it’s great:
- Deep‑penetrating gel
- Includes brush
- Suitable for walls, tiles, washing machines, and more
Excellent value for larger mould‑affected areas.
⭐ Kilrock Mould & Algae Remover (5L)
Price: £13.99
Seller: Amazon UK
Why it’s great:
- Trade‑strength formula
- Long‑lasting effects
- Ideal for severe mould problems
Perfect for landlords, property managers, or large‑scale mould issues.
Step 3: Apply the Mould Remover
Follow the instructions on your chosen product, but generally:
- Spray or apply gel directly onto the mould.
- Leave it to work (usually 10 minutes to 12 hours depending on product).
- Wipe away with a damp cloth.
- Repeat if necessary.
Tip: Gel products are best for vertical walls because they don’t drip.
Step 4: Clean and Dry the Area
After removing mould:
- Wipe the wall with warm soapy water.
- Dry thoroughly using a towel or fan.
Moisture left behind can cause mould to return.
Step 5: Repaint (Optional)
If mould has stained the paint, consider repainting using:
- Anti‑mould paint
- Anti‑condensation paint
These contain fungicides that prevent regrowth.
How to Stop Mould Coming Back
Removing mould is only half the battle. Preventing it from returning is the real goal.
Here’s how to keep your walls mould‑free long‑term.
- Improve Ventilation
- Open windows daily
- Use extractor fans
- Install trickle vents
- Avoid blocking air bricks
Airflow is your best defence.
- Reduce Humidity
Aim for 40–60% indoor humidity.
You can achieve this by:
- Using a dehumidifier
- Drying clothes outdoors
- Putting lids on pans
- Keeping bathroom doors closed when showering
- Fix Damp Issues
If mould keeps returning, you may have:
- Penetrating damp
- Rising damp
- Leaks
- Faulty guttering
Addressing the root cause is essential.
- Use Anti‑Mould Paint or Additives
These create a protective barrier on walls. - Heat Your Home Consistently
Sudden temperature drops cause condensation.
A steady background heat helps prevent mould.
Best Amazon Products to Prevent Mould (Affiliate‑Friendly Recommendations)
Here are additional products that help stop mould from returning — ideal for affiliate placements.
- Dehumidifiers
A must‑have for UK homes, especially bedrooms and living rooms.
Look for:
- 10–20L capacity
- Auto‑shutoff
- Laundry‑drying mode
- Moisture Absorbers
Cheap, passive, and perfect for wardrobes, cupboards, and small rooms. - Anti‑Mould Paint Additives
Mix into any emulsion paint for long‑term protection. - Hygrometers
Monitor humidity levels to prevent mould before it forms.
SEO‑Optimised FAQ Section
Adding FAQs boosts your ranking for long‑tail keywords.
What kills mould permanently?
Products containing fungicides or deep‑penetrating gels work best. Bleach removes stains but doesn’t always kill mould at the root.
Can I paint over mould?
No. You must remove mould completely before painting, or it will return.
Is mould on walls dangerous?
Yes. It can trigger asthma, respiratory infections, and allergic reactions. UK health agencies link mould exposure to increased respiratory disease burden.
Why does mould keep coming back?
Because the underlying moisture problem hasn’t been fixed — usually condensation, leaks, or poor ventilation.
What is the fastest way to remove mould?
A strong mould remover spray or gel from Amazon, left to work for 10–30 minutes, then wiped away.
Final Thoughts
Mould on internal walls is a growing problem across the UK, with millions of households affected. The good news is that with the right products, proper cleaning techniques, and long‑term prevention strategies, you can eliminate mould and keep your home healthy.
Using high‑quality mould removers — like the Amazon products listed above — makes the process faster, safer, and more effective. Pair this with improved ventilation, humidity control, and anti‑mould paints, and you’ll dramatically reduce the chances of mould returning.
