The hidden life of mould

Why spores are the real problem — and how ArcAirTech provides a solution to eliminate them

The common assumption? Once the visible mould has been treated and wiped away, the problem is solved. Unfortunately, this isn’t the case.

As many landlords can attest, tackling mould often feels like an endless cycle: clean, repaint, ventilate, repeat. Yet despite their best efforts, mould frequently returns — sometimes after weeks, sometimes months.

The invisible enemy: Mould spores and their regeneration cycle

Mould is a living organism with a highly resilient reproductive system. When mould becomes visible, it’s already releasing thousands of new spores into the surrounding environment. These spores settle in areas often hidden from view — carpets, curtains, bedding and behind or beneath furniture.

Even after a mould wash or surface treatment appears successful, millions of microscopic spores can remain suspended in the air or embedded within porous materials. These spores are incredibly light and invisible to the naked eye, allowing them to linger for long periods. Once the right conditions return — warmth, moisture, and organic material — they settle, colonise and begin to grow again. And so, the cycle starts all over.

Mould spreads through this process of regeneration. Each new colony releases more spores into the air, allowing mould to migrate throughout a property. This constant cycle of release and recolonisation is what makes mould so persistent and difficult to eliminate through surface cleaning alone.

It’s why many landlords, despite carrying out what seem like “effective treatments”, still receive call-backs from tenants reporting that “the mould is back.”

At ArcAirTech, we’ve conducted multiple on-site mould spore tests where these treatments had been completed — with not a single visible patch of mould — yet air samples revealed significant concentrations of active spores. These spores are what fuel recontamination and the seemingly “mysterious” reappearance of mould weeks later.

ArcAirTech's hydroxyl technology: A proven way to break the cycle

At ArcAirTech, we focus on what truly stops mould at its source.

Our patented hydroxyl technology replicates nature’s own cleaning process — generating hydroxyl radicals, the same molecules naturally produced in our atmosphere to purify air and surfaces.

These hydroxyls bond with mould spores at the molecular level, breaking them down into harmless base elements. This disrupts spore regeneration, halts visible surface mould and helps prevent future spread.

Due to their highly reactive nature, hydroxyls get to work instantly. They operate at the microscopic level, seeking out mould spores in every nook and cranny — even within porous materials such as mattresses, carpets, soft furnishings and clothing.

Thanks to our patented approach, we’re able to accelerate reaction speed and enhance durability, producing long-lasting hydroxyls that continue protecting your property long after initial treatment. This allows us to:

• Eliminate up to 99.9% of mould spores in the air and on surfaces
• Provide a whole-home solution — with one unit capable of covering up to 1,500 square feet

The added benefits of hydroxyl technology

Unlike harsh chemicals, hydroxyls are completely safe for use in occupied spaces — meaning our units can run continuously while tenants remain in the property.

Our systems harness the natural moisture and airflow within a property as part of their process. When running continuously, they help recycle and balance indoor air and humidity — reducing condensation and the excess moisture that mould needs to thrive.

Beyond mould, our technology also eliminates odours, viruses, pathogens, allergens, VOCs and particulates, creating a truly healthy home environment.

Beyond clean walls: Cleaner air and healthier tenants

Airborne mould spores aren’t just a nuisance — they can affect tenant health, triggering allergies, respiratory issues and other long-term conditions.

By addressing mould at the spore level, landlords not only protect their properties but also safeguard tenant wellbeing — reducing complaints, improving retention and meeting the ever-rising expectations for health and safety in the private rental sector.

With ArcAirTech’s hydroxyl technology, landlords finally have a safe, proven and effective solution to break the cycle.