Quick Answer
Remove small patches of mould on walls with undiluted white vinegar sprayed directly on, left for an hour, then wiped clean, or a baking soda and water paste for a gentler approach. For mould on fabric, add laundry detergent and wash on the highest temperature the fabric allows, then air dry rather than tumble dry. Wear gloves, a mask, and goggles throughout, and always address the underlying moisture source or mould will return.
Why the NHS Takes Mould Seriously
The NHS confirms that mould can increase susceptibility to respiratory problems, respiratory infections, allergies, asthma, and can contribute to immune system damage. Babies, children, and anyone with existing medical conditions are at greater risk and should stay away from affected areas until mould has been properly treated.
What Mould Actually Needs to Grow
Mould needs four things to establish itself: organic material such as paint, wallpaper, or wood, moisture, low airflow, and limited direct sunlight. Of these, excess moisture is the one you can most directly control in your home, which is why tackling dampness is central to any lasting fix.
Safety Precautions Before You Start
- Wear gloves, a respirator mask, and goggles without ventilation holes to avoid inhaling or touching mould spores
- Never dry brush or vacuum mould, since this sends spores airborne and increases health risks
- Always use a damp cloth or direct spray application rather than a dry method
- Ventilate the room well during and after treatment
Removing Mould From Walls With Vinegar
- Pour undiluted white vinegar into a spray bottle
- Spray directly onto the mouldy area, covering it fully
- Leave it to sit for at least one hour
- Wipe clean with a damp cloth
- Dry the area thoroughly afterward
Removing Mould From Walls With Baking Soda
- Mix one teaspoon of baking soda with two cups of warm water in a spray bottle
- Shake well and spray onto the affected area
- Scrub gently with a soft brush or cloth
- Rinse with clean water, then spray lightly again to help prevent immediate regrowth
- Wipe dry
Combining Both for Stubborn Mould
For more established mould, spray vinegar first and leave it for 30 to 60 minutes, then follow with the baking soda paste method. The combination tackles both surface mould and some of the deeper staining that vinegar alone may not fully lift.
Removing Mould From Fabric
Add a few drops of laundry detergent to the mouldy area and rub it in gently, then wash on the highest temperature the specific fabric allows, checking the care label first. Air dry rather than tumble dry until you are completely sure the mould has been removed, since trapped heat and moisture in a dryer can worsen mould that has not been fully eliminated.
Common Types of Wall Mould
| Type | Appearance |
|---|---|
| Aureobasidium | Pink, brown, or black, darkening with age; grows behind wallpaper or on painted and wooden surfaces |
| Cladosporium | Greenish-brown with a suede-like texture; common on upholstery, fabrics, and carpets |
Aureobasidium in particular should never be touched with bare skin, since it can cause eye, skin, and nail infections.
Identifying the Underlying Cause
- Condensation: water droplets on windows, damp patches near radiators or behind furniture
- Rising damp: tide marks on lower walls, crumbling skirting boards, white salt deposits
- Penetrating damp: damp spots, staining, peeling paint, a sudden musty smell
- Roof or upper leaks: damp patches on ceilings or upper walls that worsen after rain
Cleaning mould without addressing which of these applies means it is very likely to return within weeks.
Preventing Mould From Coming Back
- Open curtains during the day to let in natural light and fresh air
- Use a dehumidifier in consistently damp rooms, particularly bathrooms and bedrooms with drying laundry
- Keep kitchen and bathroom doors shut and open windows while cooking or showering
- Don’t leave washing in the machine for more than eight to twelve hours after the cycle finishes
- Fit an extractor fan in bathrooms and kitchens if you don’t already have one
- Apply a biocidal or anti-microbial spray after cleaning to help prevent immediate spore regrowth
When to Call a Professional
Mould that covers a large area of wall or ceiling, keeps returning despite repeated treatment, or is linked to a structural leak needs more than household cleaning products. A damp specialist can identify and fix the underlying cause, particularly for rising or penetrating damp, which household treatments alone cannot resolve.
Frequently Asked Questions
Is bleach effective against mould?
Diluted bleach works for small surface patches on tiles or around windows, but larger infestations need a proper fungicidal wash rather than everyday household bleach.
Can I vacuum mould to remove it?
No, vacuuming or brushing dry mould releases spores into the air, increasing the risk of inhaling them.
Will cleaning mould stop it coming back permanently?
Only if the underlying moisture source, condensation, a leak, or damp, is also addressed; cleaning alone treats the symptom, not the cause.
Is mould on walls dangerous to health?
Yes, the NHS confirms mould exposure can worsen respiratory problems, allergies, and asthma, with babies, children, and those with existing conditions most at risk.
Can mould be removed from carpets the same way as walls?
No, carpets with mould generally need professional shampooing rather than a spray-and-wipe approach used on hard wall surfaces.