Pressure Washing Services


Gardening & Property Maintenance

Tree Change

Pressure Washing Services

Here at Tree Change, we love watching the transformation take place as we carry out pressure and soft washing services!

We’re sure you have seen concrete, walls, brickwork, roofs and solar panels with a black colour that has developed over the years (check out the video). This black stain is usually a mix of Black Algae (usually Gloeocapsa magma​) and Black Mould (Stachybotrys chartarum). They aren't the same thing, but they're close. Mould is a type of fungus, while algae is a form of plant life.

Fungi propagate by spores, and so do many species of algae, including ​Gloeocapsa magma​. When the microscopic spores land on a suitable surface, such as your driveway, they send out roots that feed on tar, limestone, and gravel. They grow into a colony that can support other organisms, including mould. Black algae isn't a health hazard, but the mould growth it supports may be.

Black Mould releases mycotoxins which are toxic substances that some fungi produce. Research suggests that mycotoxins from S. chartarum have a link to serious health problems in people who live in contaminated buildings. One such health concern is mycotoxicosis — mould poisoning.

A study found that infants and young children exposed to mould in the home had an increased risk of developing asthma by the age of 7.

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