New year, new risks: Why “doing what we’ve always done” is costing landlords more

The greatest risk facing landlords this year is not adopting something new — it is standing still while expectations continue to rise. Tenants are better informed. Complaints escalate faster. Local authorities increasingly expect evidence of prevention, not repetition. What may have been considered acceptable five years ago is now often viewed as insufficient. 

This does not mean abandoning tried-and-tested practices. It means recognising where those practices reach their limits — and where additional tools are required to achieve lasting resolution. Before adopting any new approach, professional landlords should ask three simple questions: 

• Is it scientifically or commercially proven both inside and outside the housing sector? 

• Does it address the underlying issue, not just the visible result? 

• Is it practical, fast, and proportionate for residential use at scale? 

Solutions that meet these criteria are not trends — they are the natural evolution of professional property management. Before we talk about those solutions, lets take a deeper dive into some of the current methods used.  

The hidden cost of "proven" old methods

Many traditional remedies for mould-related issues are described as proven simply because they have been used for decades. Bleach-based cleaning, fungicidal washes, repainting, dehumidification and improved ventilation all have their place — but they share important limitations. They are typically: 

• Focused on reducing favourable conditions rather than eliminating mould at source 

• Limited to treating what is visible, while ignoring what cannot be seen 

Mould remains problematic at spore level when airborne or embedded within fabrics and porous materials, often long before visible growth becomes apparent. For landlords, the challenge is rarely the cost of a single intervention. It is the cumulative impact over time: 

• Repeat callouts 

• Extended void periods 

• Ongoing tenant dissatisfaction 

• Disputes that escalate more quickly than they once did 

• Progressive damage to surfaces, furnishings and long-term asset value 

Proven doesn't mean old - It means tested

A common misconception within housing is that newer solutions are untested, while traditional methods are proven. In reality, many of the most effective technologies now entering the sector are neither new nor experimental — they are simply new to residential use. 

Air sanitisation and purification technologies are a clear example. These systems have been used for many years in sectors where outcomes must be measurable and reliable, including healthcare, hotels and hospitality, commercial buildings and public facilities. 

At ArcAirTech, this has been the company’s own trajectory. Its work began outside of housing, in environments where air quality performance is closely scrutinised and evidence-led results are essential. Following years of controlled testing — including published data on mould spore reduction — the application of our technology naturally progressed into the housing sector as social housing providers and landlords sought innovative, evidence-based solutions capable of eliminating mould at source while supporting improved living conditions for occupants. 

Since early 2024, ArcAirTech’s patented, nature-based technologies have undergone extensive real-world property testing designed specifically to assess performance in residential settings. Following independent validation across the housing sector, the technology is now used by some of the UK’s largest social landlords for rapid-response deployments, post-remediation programmes and persistent mould cases where traditional methods have failed to deliver lasting outcomes. 

Why active technologies change the outcome

Mould is not simply a ‘surface’ issue. Spores exist within the air, fabrics and porous materials long before they become visible on walls or ceilings. Active purification technologies take a different approach. Rather than masking symptoms, they focus on molecular-level treatment of airborne and surface contaminants, delivering outcomes that conventional methods cannot achieve in isolation: 

• Elimination of airborne mould spores 

• Neutralisation of spores on surfaces and within porous materials and fabrics 

• Disruption of the mould regrowth cycle 

• Significant improvement in odours commonly associated with damp environments 

• Clear, demonstrable action that tenants can see and experience 

For landlords, speed and effectiveness are critical. In operational deployments, ArcAirTech’s systems have demonstrated the capability to eliminate up to 99.9% of mould spores within 24 hours, while also inhibiting spore germination and recolonisation. This supports long-term resolution rather than repeated intervention. 

In 2026, the measure of an effective solution is no longer how quickly a problem is treated — but whether it’s treated effectively.