The woman is sadly looking at the mould on the walls in her home.


Mould contamination and growth in buildings in New Zealand can be caused and supported by water leaks, floods, poor ventilation, lack of insulation and substandard building techniques.  Whether it is caused by a leaky building, a humid environment, sewer back-flows, plumbing failures or flooding, the result can be a debilitating health hazard.

The health impacts in NZ are well documented including respiratory infections, allergic responses, headaches, fatigue, and sore throats. These health impacts can result in buildings becoming uninhabitable and requiring expensive remediation if not dealt with in a timely manner.

The presence of mould is not always obvious. Mould may exist behind wall linings and in roof spaces for some time, causing residents continued respiratory discomfort and only become evident when the spores penetrate surfaces and discolouration and growth are noticed.

Our range of mould treatment services

What is Mould?

Mould is a form of fungi which are naturally occurring organisms, it prefers to grow in damp and poorly ventilated areas and replicates by making spores.

Different types of mould are present nearly everywhere, inside, and outside and can grow in and on materials such as food, furniture, walls, paper, fabrics, carpets, timber, and plumbing.


We have considerable experience in performing mould testing in the home, workplace or for pre-purchase assessments of a property.

As part of the inspection process, NZRS can perform surface swab sampling and air sampling using industry standard testing equipment. These samples will then be provided to our independent mould lab for analysis and culture with an independent analytical report from our mould lab.


Mould and mildew cleaning can be a time consuming and difficult job to perform in a property and pose health risks if not cleaned safely.

Some mould and mildew may just require to be cleaned depending on the severity and the source of the mould.

NZRS can assist with all mould cleaning jobs, we know first-hand that mould can be stubborn, especially if it has time to go grow below the surface.

We use specialised tools, cleaning equipment, and effective cleaning techniques to combat the mould and mildew cleaning jobs.

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Our Process

The process of our mould removal services consists of a mist spray of our environmentally friendly non-toxic or hazardous mould removal agent.

This chemical contains natural ingredients and is a hospital-grade disinfectant. The chemical is completely safe for those that suffer from allergies and asthma and will kill mould at the spore and has a reaction which will help to prevent mould from growing on any surfaces it is applied to.

HEPA vacuums are used to extract mould spores from all soft furnishings, floors, and carpets. 99.5% of airborne mould spores and bacteria are captured when operating our air purifiers.

This is an essential part of the mould removal process as we are capturing the mould spores not just killing them. Dead mould spores are just as toxic as live mould spores and they are a food source for mould spores.

Mould Treatment FAQs

How does mould grow?

The growth of mould occurs when the water source is in an environment with little or no sunlight causing the area to be damp and humidity is present.

Is mould dangerous to your health?

Airborne mould spores are produced from mould, these spore particles can increase in an indoor environment. When these mould particles increase, they can pose a risk to your health and respiratory system, in some cases requiring a consultation with a medical professional.

Where could the moisture source be coming from?

Shortage of bathroom ventilation, roof leaks, plumbing leaks and condensation can be a common source of moisture that can cause mould.

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