how to eliminate mold for good
Floor & Surface Cleaning

How to Eliminate Mold from Walls

Mold is an unwelcome sight in any home – discover how to get rid of mildew and mold from the walls in your house with this useful guide.

Mildew and mold are the bane of most households, but luckily, it’s possible to use everyday cleaning products to banish and prevent mold from creeping back in again. Mold, whether on walls or other surfaces, like floors and carpets, can be bad for your health, so it’s also really important to tackle the root cause. Read on for a quick, 3-step guide on how to eliminate mold from walls in your home.

Mold on Walls – Why Does it Occur?

  • Mold is a kind of fungus that develops from airborne spores. It usually grows in damp, warm conditions without much airflow, which is why household bathrooms and loft spaces often suffer from mold. It is often simply caused by humid conditions and lack of ventilation, but sometimes mold on walls can be due to plumbing leaks, both inside and outside the property. Badly insulated heating pipes can also cause a build-up of moisture behind the walls.
  • Mildew is the name for the most common type of black mold on walls, characterised by spots that can then spread over larger areas if left untreated. To find out if you have mildew on your walls, apply some bleach onto the affected area with a cloth. If the dark colour fades after a few minutes, it’s mildew. If not, the patch is probably just dirt. Read on to find out how to clean black mold.

Cleaning Mold off Walls in 3 Steps

A word of caution: mold can cause allergic reactions and poor health, so if you have an extensive problem with mold on walls, it may be best to seek expert help. If tackling a smaller area, make sure you wear protective eyewear, gloves, and a face-mask, as contact with the spores can be harmful. Open windows or use a fan in the room while working.

  1. Make a solution of chlorine bleach and water – usually 1 part bleach to 3 parts water. A good household bleach such as Domex is ideal, as it is proven to kill mold and remove bad odors.
  2. Using a stiff-bristled brush, scrub the blackened area.
  3. Rinse thoroughly and dry.

If this doesn’t work, there are products specifically formulated for mildew and mold on walls that may be stronger, but remember never to mix cleaning solutions together as this can cause dangerous chemical reactions.

How to Eliminate Mold for Good: Our Top Tips

Once you’ve dealt with a mold infestation on your walls, the next step is to try to stop it recurring. Here are your options:

  1. Buy a specialised anti-mold product. An anti-microbial spray, for example, can help prevent the spores from settling again. Anti-mold paint can also be purchased from most DIY stores.
  2. Consider installing an electric de-humidifier in badly affected areas. This is ideal for long-term mold prevention.
  3. Look into upgrading your home insulation. Sometimes, but not always, bad insulation is the root of the problem. Walls and ceilings that are properly insulated will be less affected by condensation, and therefore mold.

Don’t panic if the mildew and mold on walls returns: this is a common occurrence, and you’re now well armed with advice on how to deal with it.

Top Tip


Always follow the instructions carefully when using specially formulated mold cleaners. Take care to protect yourself by wearing eye protection, gloves, and a face mask, and test the product in a small area first before continuing. Alternatively, use an all-purpose product like Cif for safe & easy cleaning.

Key Steps:

  1. Mold can be removed from walls in 3 easy steps – to begin you will need a solution of chlorine bleach and water.
  2. There are a variety of ways to help prevent mildew and mold – one strategy is to install an electric de-humidifier.

Safety Warning


Use biocides safely. Always read the label and product information before use.