Mould Removal near you

First, find and fix the water. That may mean a licensed plumber tracing a leak, a roof plumber dealing with gutters and flashings, a builder addressing a failed membrane, or a ventilation fix — but nothing else should start until the source is identified and there is a plan to stop it. Remediation carried out before the water is fixed is an appointment to do it all again.

Second, contain and remove. The work area is isolated so that disturbing growth does not distribute spores through the rest of the house, porous materials that cannot be cleaned are cut out and bagged, and non-porous surfaces are cleaned rather than dry-brushed or blown with compressed air. Cleaning that aerosolises growth makes the problem larger and more widely distributed.

Third, dry the structure and verify it. Surfaces dry long before framing, insulation and cavities do, and a remediation that stops when things look dry has not finished. Moisture readings taken over successive days are the evidence, and the final one is what tells you the building has actually returned to a normal moisture content. Ask for those readings in writing along with photographs of what was removed.

A small patch of mould on bathroom grout is ordinary household cleaning, and there is no reason to hire anyone for it. The situations that warrant a professional are different: substantial areas, growth inside wall cavities or ceiling spaces, anything following flooding or sewage, and any case where someone in the household has asthma, a respiratory condition, an immune condition, or is very young or elderly.

There are also things not to do regardless of scale. Do not dry-brush, sand or blow mould with compressed air, because that puts into the air exactly what you are trying to remove. Do not paint over it, which hides it while it continues to feed on what is behind the paint. And if the affected material might contain asbestos — which is a live question in Australian houses built before the national ban, particularly in bathrooms, laundries and eaves — stop and get it assessed before anything is cut, drilled or removed. Disturbing asbestos is a far more serious problem than the mould you were addressing.

When mould keeps returning to the same wall next to a bathroom, the question stops being about cleaning and becomes about whether the wet area complies. The National Construction Code sets Performance Requirement H4P1 for wet areas in houses: construction must prevent health risk, dangerous conditions and damage to building elements caused by dampness or water flow. Compliance is demonstrated either through the ABCB Housing Provisions Part 10.2, or through the relevant Part 10.2 clauses combined with AS 3740, the Australian Standard for waterproofing domestic wet areas, in the 2021 edition referenced by NCC 2022.

The specific provisions that most often turn out to be the cause are worth knowing by number, because they give you something concrete to ask about. Shower area walls must be waterproof to not less than 1800 mm above the floor substrate. Wall junctions and joints within the shower area must be waterproof for at least 40 mm either side. Where a floor waste is installed the floor must fall to it continuously, at not less than 1:80 and not more than 1:50. If any of those were not achieved, you have a building defect producing mould rather than a mould problem in a sound building, and the remedy and the recourse are both different.