When you picture a disaster zone, you probably imagine earthquakes, floods or fires, not your own living room. But as Building Forensics founder Jeff Charlton explains in this week’s episode of The Healthy Home Show, the same conditions that create chaos on a large scale — moisture, contamination and poor remediation — are quietly affecting our everyday homes.
Jeff has spent four decades working across nuclear, biological and flood recovery projects around the world, and now investigates building-related illness here in the UK. His insights reveal why our approach to mould is dangerously outdated and why trying to “kill” it might actually make us sicker.
Listen to the Full Podcast Episode: Spotify
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From the Gulf War to the British Damp Crisis
Jeff’s story reads like a thriller. After training in chemical and radiological defence and working with the U.S. Corps of Engineers in Kuwait, he returned to the UK to find a different kind of disaster: homes full of hidden damp and mould that were quietly undermining people’s health.
He soon realised that the same rigour used in disaster recovery was missing in domestic remediation. Insurance companies wanted speed and surface fixes, not science-based solutions.
“Doing it right once is far cheaper and safer than doing it badly three times.”
The Problem with “Killing” Mould
Most of us reach for bleach or a fogging spray when we see black mould appear. Jeff warns that these products can actually make things worse. When mould is “killed”, the spores fragment into tiny particles that our noses and lungs can’t filter out.
Instead of neutralising the problem, we’re breathing the toxins directly into our bloodstream.
“Dead mould is up to forty times more hazardous than live mould,” Jeff explains.
His rule of thumb: don’t kill it, remove it. Find and fix the moisture source first, then safely remove affected materials rather than trying to sanitise them.
Why Standards Still Fall Short
Even after tragedies like little Awaab Ishak’s death in 2020, Jeff says the UK still lacks strong, enforceable standards. He welcomes Awaab’s Law, which comes into force this year, but worries it prioritises speed over competence.
“If you do something badly, quickly, you just make it worse,” he says.
Testing, clearance and ongoing monitoring remain inconsistent, especially in social housing where tenants rarely have the resources to challenge poor workmanship.
What He Found in a Brand-New School
One of Jeff’s most shocking investigations was a new school building, less than two years old, where both staff and children were suffering headaches, fatigue and behavioural changes.
His thermal imaging revealed soaked walls, construction faults and toxic bacteria inside classrooms.
“The building should have been closed the next day,” he says.
It’s a stark reminder that air quality isn’t just a domestic concern; our workplaces and schools can make us sick too.
So What Should You Do at Home?
Jeff’s advice is refreshingly practical:
Find the source of moisture first. Leaks, poor ventilation or cold bridging are the usual culprits.
Act fast. Mould can take hold within 48 hours of water damage.
Clean small areas on hard surfaces with warm soapy water, not bleach.
Replace porous materials like wallpaper or plasterboard if growth keeps returning.
Ventilate every day. Even opening windows for ten minutes can make a difference.
Document everything if you rent. Photos, dates and messages matter when escalating a complaint.
What struck me most about Jeff’s perspective is how often health hazards start with design decisions: materials that can’t breathe, blocked ventilation, and quick fixes that trap moisture.
We don’t think of our homes as potential disaster zones, yet many of the same mistakes keep repeating: seal it up, paint it over, move on.
“If you can see mould, you’re lucky,” Jeff told me. “It’s one of the only visible indicators that something’s out of balance in your home.”
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Key Takeaways
✔️ Moisture control is the real cure, not chemicals.
✔️ Fix the cause before tackling the stain.
✔️ Bleach and foggers spread toxins further.
✔️ Fresh air, warmth and good design prevent most problems.
✔️ Tenants: document and demand safe living conditions.
Mould might not sound dramatic, but as Jeff’s career proves, the line between a damp home and a disaster zone can be thinner than you think.
🎧 Listen to the full conversation on The Healthy Home Show:
Where to Follow Jeff’s Work
Jeff Charlton’s Website – Building Forensics
Jeff Charlton – Linkedin
If you enjoyed hearing Jeff’s insights on the importance of Unmasking Mould…. You can learn more and dive into all of my 12 main concepts that create a Healthy Home and Lifestyle on my website – www.charlielemmer.com
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Be WELL
Charlie x
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