Why Cleaning Mould with Bleach Doesn’t Actually Solve the Problem in UK Homes.

16 Jul

The Truth About Mould and Bleach: It’s Not What You Think.

If you’ve spotted black mould on your bathroom ceiling, windowsills or behind furniture, your first instinct might be to grab the bleach. But here’s the harsh truth: cleaning mould with bleach doesn’t remove it, it just masks the problem.

In fact, using bleach or other common household cleaners can make the situation worse by disturbing mould spores and spreading them into the air, where they can be breathed in or settle elsewhere in your home.

⚠️ What Actually Happens When You Use Bleach on Mould?

It discolours the mould, so it may look like it’s gone... but the roots (called hyphae) often remain alive under the surface.
It increases airborne spores – wiping or scrubbing can disturb the mould and release tiny, invisible particles into the air, affecting your breathing and potentially making the issue worse.
It doesn’t fix the cause – mould grows back if the underlying issue (usually damp, condensation, or poor ventilation) isn’t addressed.

Bleach is also not recommended for porous surfaces like wood, grout, or drywall – where mould tends to live deepest.

DIY Tips to Tackle Mould Safely (Until You Can Get a Professional In).

While we always recommend professional mould remediation, especially with recurring or widespread mould, there are some safer steps you can take at home if the issue is small:

1. Ventilate the Area

Open windows and doors to increase airflow. If you have extractor fans, use them, especially in bathrooms and kitchens.

2. Wear PPE

Use gloves, a mask, and goggles when dealing with mould. You want to avoid breathing in spores or getting them on your skin.

3. Use the Right Products

Look for mould-specific cleaning sprays that are fungicidal (not just antibacterial). These are more effective than bleach and usually less aggressive.

4. Don’t Just Clean…Dry

Dry the area thoroughly after cleaning. Mould loves moisture, so you want to remove any dampness ASAP.

5. Tackle Condensation

Use a dehumidifier or moisture-absorbing products, especially in high-risk areas like bathrooms, bedrooms, and behind furniture.

Why You Should Call in a Mould Remediation Professional

If mould keeps coming back, if it covers a large area, or if someone in your home is experiencing health issues like coughing, wheezing or headaches - you need professional help.

A trained specialist will:

Identify the root cause (damp, leaks, poor ventilation)
Treat the mould safely and thoroughly
Prevent it from returning using proven methods and preventative solutions

At ClearCo, we offer friendly, professional mould remediation across Kent and the South East. We use safe, effective treatments and help you understand how to reduce the chances of mould returning in future.

In Summary

Bleach and household products only hide the problem temporarily.
Mould spores can spread and harm your health if disturbed.
You can take steps at home, but professional treatment is the most effective, long-term solution.