Are We Solving Damp and Mould - Or Just Resetting the Clock?

Q. Why do the same damp and mould issues keep coming back, even when landlords are acting? 

In most cases, it’s not a lack of action, but rather the type of action being taken. 

The cycle is familiar: a tenant reports an issue, a contractor attends, the visible signs are treated, and the property is returned to a lettable standard.  

On paper, that’s a resolved case, but often in practice, the underlying issue hasn’t changed, which is why the problem returns.  

That cycle has been built into operational models for years. The challenge we now face is that it no longer holds up under scrutiny. 

Q. What’s changed in the risk landscape? Why is this now more of a problem than it was five years ago? 

Expectations have shifted. 

Tenants are more informed and more willing to escalate, complaints move faster, and regulators are increasingly focused on evidence of prevention, not just response.  

That creates a different kind of exposure. Repeatedly addressing the same issue, even in good faith, is no longer seen as reasonable if the outcome doesn’t hold.  

Q. Where do traditional approaches start to reach their limits? 

Most conventional methods focus on what can be seen, for example, cleaning, redecorating and ventilation improvements, and they all play a role. However, they are typically addressing conditions or visible growth, rather than eliminating the problem at source.  

The difficulty is that mould doesn’t begin on the surface. By the time it’s visible, spores are already present in the air and embedded within materials. Treating only what’s visible can create the appearance of resolution, without actually breaking the cycle. 

Q. What does it mean to treat the problem at source? 

It means recognising that mould is not just a surface issue. 

Spores exist in the air, within fabrics, and inside porous materials long before visible growth appears. Addressing that requires a different approach - one that focuses on the wider environment, not just isolated surfaces.  

That’s where more active forms of intervention start to become necessary, particularly those designed to work at an airborne and molecular level. 

Q. What can housing learn from other sectors here? 

In sectors like healthcare, hospitality and commercial environments, outcomes must be measurable. 

Air quality isn’t judged visually - it’s monitored, tested and evidenced. Technologies designed for those environments have been developed around that principle - that if the outcome can’t be demonstrated, it can’t be considered resolved.  

What’s changing now is that some of those approaches are being applied within housing, where the expectation for evidence is starting to move in the same direction. 

Q. What does “good” look like now, particularly in a post-Awaab’s Law context? 

It’s not about how quickly an issue is addressed - it’s about whether it stays resolved. 

That means being able to demonstrate that the underlying cause has been tackled, that the risk of recurrence has been reduced, and that the living environment has measurably improved. 

Without that, the system defaults back into repetition and that’s where cost, risk and dissatisfaction build over time. 

Q. How should landlords start to evaluate whether an approach is actually working? 

There’s a shift happening from activity to outcome, meaning the question is no longer “did we do something?”, but rather: 

• did it address the underlying issue?  

• is there evidence it has worked?  

• and is it practical to deliver consistently at scale?  

Approaches that can answer those questions are starting to define what effective looks like. 

Q. What’s enabling that shift in practice? 

One of the reasons this change is becoming possible is the emergence of more active approaches to managing indoor environments. 

Traditional methods have largely focused on controlling conditions, for example, reducing moisture, improving airflow and addressing visible growth. Active technologies take a fundamentally different approach. They are designed to work continuously within the environment itself, targeting airborne contaminants as well as what sits on surfaces and within materials. 

That’s an important distinction because, if the underlying issue sits beyond what can be seen - within the air, fabrics and porous materials - then approaches that only address surfaces will always have limits. Active systems are designed to close that gap, reducing spore presence across the whole environment rather than in isolated areas. 

What’s notable is that many of these approaches are not new. They’ve been used in sectors where outcomes must be measurable and consistent, including healthcare and commercial environments. Their introduction into housing reflects a broader shift - from treating symptoms to managing the environment as a whole. 

The question now isn’t whether something has been done, it’s whether the approach being used is capable of resolving the problem, not just managing it.