You can sometimes clean a small patch of surface mould from carpet, but if it is widespread, has reached the underlay, or keeps coming back, the carpet often needs replacing. Whatever you do, fix the damp that caused it first, or the mould will return.
Stay safe
Mould can affect health, particularly for people with asthma, allergies or other breathing problems, as well as babies and older people. If that applies to anyone at home, or the affected area is large, get professional advice rather than tackling it yourself. Wear gloves and a mask, keep the room well ventilated, and avoid brushing it dry, which spreads spores.
Find the cause
Mould needs moisture. Common causes include leaks, rising or penetrating damp, condensation and a carpet that stayed wet after a flood or poor clean. If you rent, tell your landlord about damp and mould in writing.
For a small surface patch
- Open windows and move the carpet into the air if you can.
- Dampen the area lightly, so that spores do not get into the air.
- Clean with a mould product suitable for carpet, following the label. Test it on a hidden area first.
- Blot, then dry thoroughly using a fan or dehumidifier.
- Check the underlay and floor below if you can lift the edge.
Avoid bleach, which can permanently strip the colour from carpet.
When to replace it
- The mould has reached the underlay or backing.
- It covers a large area.
- A musty smell remains after cleaning.
- The carpet was soaked by dirty water, such as a sewage leak.
Not sure what you are dealing with? Send us the details and we will tell you honestly whether cleaning is worth trying.