Volume 12 - PPE, Air and Why Fast Fixes Fail

Why do rapid interventions, chemical treatments and PPE-led approaches so often create reassurance without delivering genuine safety?

In PPE, Air and Why Fast Fixes Fail, Jeff Charlton examines why contaminated buildings cannot be made safe through speed, surface treatment or protective equipment alone.

This twelfth volume of the Building Forensics Legacy Series challenges the belief that terms such as “approved”, “certified”, “rapid response” and “kills 99.9%” automatically translate into protection. The central argument is clear: exposure reduction is the only defensible objective, and every intervention must be judged against that standard.

The book explains that PPE is not remediation. It does not remove a hazard, neutralise a contaminated environment or prove that a space is safe for reoccupation. It is a temporary barrier and the final layer within a wider hierarchy of controls.

Inside this volume

• Why PPE is the last line of defence, not the first
• Why speed should never be confused with safety
• The limitations of rapid-response remediation
• Human, environmental and chemical dwell time
• Why “Will it kill mould?” is the wrong question
• Why dead mould can remain biologically hazardous
• The limits of chemical treatments in porous materials
• Why fogging and spraying can increase airborne exposure
• Smell as an early environmental warning signal
• Why air is the primary exposure pathway
• The limitations of negative-pressure units
• Brownian motion and persistent breathing-zone particles
• Why laboratory efficacy claims may fail in real buildings
• How incorrect PPE removal can spread contamination
• The correct sequence for effective remediation and verification

A major focus is the difference between killing mould and removing risk. The volume explains that dead mould can still contain proteins, toxins, glucans and inflammatory fragments. Chemical treatment may kill surface growth while leaving contaminated material in place—or breaking it into smaller particles that are more easily inhaled.

The book also examines why chemicals cannot replace physical removal. Mould can grow within paper, timber, fabrics, dust and other porous materials, where chemical products may be neutralised before reaching embedded contamination. Surface improvement does not necessarily mean that the health risk has been removed.

Another central theme is the role of airborne exposure. Small particles can remain suspended within the breathing zone, meaning a building may continue to expose occupants even when surfaces appear clean and visible mould is absent.

The book concludes with a practical sequence for meaningful remediation: identify the moisture source, stop water ingress, remove contaminated materials where necessary, physically clean remaining surfaces, capture airborne particulates and verify clearance before considering chemistry as secondary support.

Written for

Housing providers, remediation contractors, environmental health professionals, insurers, local authorities, safety professionals, clinicians, regulators, legal teams and anyone responsible for decisions involving contaminated buildings.