The Damp And Mould Assumptions The Sector Can’t Afford To Rely On Anymore

“If we improve ventilation, we solve the problem” 

Ventilation plays an important role in managing moisture levels within a home. It can reduce condensation, improve airflow, and create conditions that are less favourable for mould growth. 

However, it doesn’t remove what is already there. 

Mould spores can remain present in the air, in soft furnishings, and within porous materials long after ventilation has been improved. Opening windows or installing ventilation systems may help stabilise conditions, but they don’t eliminate existing contamination.  

The risk is that ventilation improvements are taken as a signal that the issue has been addressed, when in reality, the underlying problem remains.  

That’s often where the cycle begins. The intervention has been made, the property appears improved, but the conditions for recurrence are still in place. 

Effective mould control requires continuous elimination of airborne and surface spores. 

It’s a similar story when it comes to the types of homes we associate with mould. 

“Mould is mainly an issue in older homes” 

There’s a long-standing perception that mould is largely a feature of ageing housing stock, linked to older construction methods, draughty walls and old roofs. 

But it’s not as simple as that. Newer homes can also experience high humidity levels, particularly in the early stages as building materials dry out. At the same time, more airtight construction - while improving energy efficiency - can reduce natural ventilation if not properly managed.  

Mould thrives wherever moisture and still air combine, and the reality is, that can happen in any property, regardless of age. 

The implication is that risk can be misjudged, with attention directed towards older stock, while issues in newer homes are overlooked or underestimated. 

As one of the most robust micro organisms ever identified, mould has the capability to grow, germinate, proliferate even in the harshest of environments. It is a ventilation, humidity and spore problem, not an age problem. 

That same pattern shows up in how responsibility is understood. 

“It comes down to tenant behaviour” 

Tenants can influence moisture levels through everyday activities, but they cannot control structural factors such as insulation, thermal bridging, ventilation design, or the presence of spores within the home. 

They also can’t see or address contamination that exists beyond visible surfaces - in the air, behind furniture, or within materials. 

Framing the issue primarily as behavioural can slow down effective intervention. It can lead to advice being repeated rather than the environment being properly assessed, and in some cases, it contributes towards eroding trust between residents and landlords. 

At its core, a property with mould has an environmental problem, not a behavioural one. That’s where the focus is now shifting, towards understanding the conditions within the home, from humidity and heat retention to airflow and the level of spores present. 

Under Awaab’s Law and the Renters’ Rights Bill, that distinction matters, both of which are now driving higher standards of tenant health and property safety.  

Even where the focus does move towards the environment, the same limitations can still apply. 

“If we heat the property, the issue goes away” 

Heating is often seen as a straightforward way to manage damp and condensation. 

Warmer air can hold more moisture, and maintaining a consistent temperature can help reduce visible condensation on cold surfaces. But heating alone does not eliminate mould spores. 

In some cases, it masks the issue rather than resolving it. A property can be warm and still have high humidity levels with existing contamination within fabrics, furnishings, and hidden areas.  

There is also a practical limitation - not all tenants can afford to heat their homes consistently, particularly during colder months. 

So, while heating helps comfort and condensation control, it is not a mould treatment, because mould is a spore issue, not just a damp issue.  

What does work? 

Eliminating mould means tackling the spores, not just the moisture. This requires a shift in how damp and mould are being addressed in practice. Traditional methods still have a role, particularly in managing moisture and visible growth, but they don’t fully deal with spores already present within the home.  

More active approaches are designed to work across the whole environment - addressing airborne and surface contamination, reaching areas that can’t easily be treated, and reducing the likelihood of recurrence.  

These approaches don’t rely on tenant behaviour, daily routines or perfect ventilation, instead, they deal with the environmental cause at its root.  

Modern housing strategies require modern solutions – ones that remove spores, work in real-world conditions and support both landlords and tenants in maintaining healthier homes.  

Over the past few years, we’ve worked closely with housing associations, private landlords and local authorities to validate our approach in real homes, not just laboratories. With proven results across more than 40 housing providers, we’ve demonstrated that eliminating mould spores dramatically reduces repeat issues, cuts ongoing maintenance costs and supports compliance with modern housing standards.  

As legislation tightens and expectations rise, we continue to help landlords adopt a practical, evidence-driven approach to creating healthier, mould-free homes at scale.