Tips for Tackling Mould Growth on Surfaces

While moulds, fungi and lichens are better known for growing on organic materials

most people are surprised to find out is that moulds can flourish on materials that are wholly inorganic such as stone, plaster, brick or even coatings of paint.

When spores adhere to a surface they only grow under ideal conditions of moisture, darkness and air movement, or rather lack of air movement. Moisture is the most common element and both high atmospheric humidity and structural defects such as leaking are common sources of surface exposure. If a structural defect is cause your surface to be wet then you will need to repair the source of the problem and allow for thorough drying before continuing with the surface treatment.

Atmospheric humidity is almost certainly the most common cause of mould growth development. This is particularly troublesome in modern, centrally heated buildings where occupants have not allowed sufficient ventilation, particularly during cooking etc. Apart from dwellings, mould growth can be a serious problem in industrial premises due to the nature of the manufactured products and conditions, e.g., in bakeries, breweries, dairies, etc

When planning your schedule set aside ample time for drying and think about how you can maximise airflow through the affected area (if possible.)

1. Use a Biocidal Wash

First you will need to treat the affected surfaces with a biocidal wash. This is a chemical substance capable of killing living organisms, usually in a selective way and is sometimes refered to as a fungicide. Protective clothing and equipment should be used and care should be taken not to splash the skin or eyes. Hands should be washed thoroughly after use and biocidal wash should always be kept away from children or pets.

In addition to the infected surfaces, all hidden surfaces (behind cupboards, fittings, under washbasins, etc.) must be treated with the biocidal wash. Wash liberally and even wash off areas you suspect may be in danger of harbouring invisible spores.

2. Scrape off the mould

Do not brush or scrape mould growth from a surface without first sterilising. Allow to stand for a period of at least 4 hours, and then scrape off all mould and loose material, remove and burn immediately.

3. Second Biocidal Treatment

Apply a further wash of the solution, and allow to this stand for a minimum period of 72 hours to complete the sterilisation of the surface. If any mould spores are still alive when applying the protective coating in the next step you run the risk of repeated mould growth.

4. Protective Coating

After preparation and after the surfaces are fully dry they should be primed and repainted with good quality paints. Choose paints to last and in buildings conducive to mould formation look for paints with fungicidal qualities.

4. Cleaning Up

After use on mould affected buildings, all equipment such as brushes, cans, scrapers. These must be sterilised with the Biocidal wash to avoid carrying mould to the next building.

If you tackle mould growth on surfaces thoroughly the first time around there less chance of it growing back.

Tips for Tackling Mould Growth on Surfaces

By: Carla

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