Mould Removal in London

Inspection & Moisture Assessment

Before any mould is touched, the actual moisture source needs identifying — condensation, a leak, or rising damp all produce mould but need genuinely different fixes, and treating the mould without knowing which is present usually means it returns within months. A moisture meter and visual inspection establish the cause, extent, and whether the mould's confined to a surface or has spread into the material underneath.

Worth knowing: Where the underlying cause turns out to be a damp issue needing its own dedicated treatment — a failed damp-proof course, for instance — that gets identified here and addressed as its own piece of work, not glossed over in favour of just cleaning the visible mould.

Containment

Disturbing mould releases spores into the air, which is why the affected area gets sealed off before any physical removal starts — plastic sheeting and negative air pressure stop spores spreading to unaffected parts of the property during the work itself. This matters more in occupied properties than empty ones, since ongoing exposure during treatment defeats much of the point of doing the treatment at all.

Mould Removal & Cleaning

Affected surfaces get physically cleaned or, where the material's porous and contamination has gone beyond the surface — some plasterboard, badly affected sealant — removed and replaced rather than cleaned, since porous materials can hold mould within their structure in a way that cleaning alone doesn't reach. HEPA filtration during this stage captures airborne spores that surface cleaning disturbs, rather than just relocating them around the room.

Antimicrobial Treatment

Once visible mould and contaminated material are removed, an antimicrobial treatment addresses spores that cleaning alone won't fully eliminate, reducing the likelihood of regrowth on treated surfaces. Products used matter for occupied homes specifically — non-toxic, low-odour treatments are worth confirming before work starts if the property has children, elderly residents, or pets.

Addressing the Root Cause

Removing existing mould without fixing whatever caused it is a temporary result dressed up as a permanent one — the moisture source identified during inspection needs its own fix, whether that's a ventilation improvement for condensation, a leak repair for penetrating damp, or a damp-proof course for rising damp. This is genuinely the most important stage of the whole process, even though it's the one most likely to get skipped by a quick clean-and-paint job.