He couldn't find the cause.
Black mould in every room — and no idea what was causing it. Adrian had cleaned, sprayed and painted for months, with nothing holding. Here's how one survey found the real cause.
Survey, dry fog and antimicrobial layer in a single visit
Airborne spore count 3.75× below the outdoor reference sample that day
"We haven't had any condensation on the bottom of the windows since — which I find quite surprising."
The worst part wasn't the mould.
Adrian and his partner had retired to a quiet bungalow in Northamptonshire. Then the black mould arrived — around the windows, across the ceilings, in nearly every room.
There's a particular kind of worry in watching mould spread through your home and having no idea why it keeps coming back.
Adrian did everything a careful homeowner does. He cleaned it, sprayed it, painted over it. Every time, it came back through.
Worse, with both of them retired, they were home all day, breathing it in — and growing more worried by the week. Adrian feared it was the brickwork, water seeping in from outside, and a big building job.
So we surveyed the home and found the real story. Not the brickwork — condensation inside, with the en suite the main culprit. We treated the whole house in a single day.
"You can't keep painting over something repeatedly. It's like patching it up and ignoring the underlying problem."
Damp and heavy mould inside the concealed en suite toilet cabinet — a suspected leak or cold pipework, and the likely source of the airborne spores
Cold spots from displaced loft insulation and thermal bridging left surfaces in five of six rooms at or below dew point — exactly where mould forms.
No extractor fan in either bathroom and humidity above 60% throughout, so moisture from daily life had nowhere to go.
After one day of treatment, the airborne mould-spore count in Adrian's home was measured at 3.75× lower than the outdoor reference sample taken the same day — a 95.68% drop, with no active-growth species found.
"It was a bit of an eye-opening experience for us — but a very professional service. I'd recommend you to anyone."
The process behind the transformation.
Four stages. One day on site. Independent lab evidence at both ends — before you spend, and after we leave.
Comprehensive survey and independent laboratory testing to identify the root cause — not just the visible symptoms.
Patented two-step dry-fog process, applied throughout the property to reach every surface the air touches and reduce mould contamination, then an antimicrobial film to inhibit regrowth.
Post-treatment lab testing gives written, independent evidence that airborne spores are back to outdoor-equivalent levels. No claims without numbers.
Four weeks on, Adrian reported no more condensation on the windows, steady humidity, and air that felt different. He's now managing the home with ease.
What a homeowner actually wants to know.
On treatment day everyone — people and pets — leaves while the fog works, then returns that evening. Once ventilated, the sterilant breaks down to acetic acid, water and oxygen, leaving no lasting residue — all under a COSHH assessment.
Sprays and mould paint only hide the surface, and the cause keeps feeding it. We found Adrian's real cause — condensation, the en suite worst — and the dry fog reaches every surface the air touches, treating air and surfaces in one pass.
A whole-home treatment takes a single day. Adrian's bungalow was surveyed, fogged and finished in one visit — family out for the day, back that evening, sleeping in their own beds.
Adrian had already spent on cleaning, sprays and paint, and the mould kept returning. One treatment cut the airborne mould by 95.68% — independently lab-verified — and showed him exactly what to manage.
If you think you have a problem with mould, start with a survey.
Diagnostic moisture & mould survey. Independent US-tested treatment. Lab-verified results. 12-month limited re-treatment warranty (T&Cs apply).
A diagnostic visit to identify exactly what's happening — before you spend anything on treatment.
Subject to availability and survey findings, urgent appointments may be available within 24 hours.
See how dry-fog works and why independent lab testing matters.