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How to clean a concrete driveway in the tropics

A person cleaning a driveway using a patio cleaning nozzle on a high-pressure washer

Overview

Algae and mould grow prolifically in the tropics because of wet season weather conditions. They can grow on your driveway and walkways, which become slippery and dangerous. With the right products and some know-how from us, getting rid of them is easy.

Steps

1Sweep the driveway

Before you start cleaning the driveway, use a broom to sweep away any leaves and debris. This will stop patches forming where the cleaner wasn't sprayed on the driveway.

A driveway that is covered in green algae

2Spray the chemical cleaner on the driveway

Before you start spraying the chemical cleaner, carefully read the instructions on the package. Put on your safety glasses and protective gloves. Starting at the bottom of the driveway, begin spraying the chemical cleaner onto it. Work your way to the top of the driveway spraying all over it with the cleaner. 

A person wearing protective gear spraying chemical cleaner on a driveway

3High-pressure clean the driveway

Change the nozzle on the high-pressure water cleaner to the patio cleaning nozzle. Connect the high-pressure cleaner to the garden hose. Start at the top of the driveway and slowly sweep your way across and down the entire driveway with the high-pressure cleaner. Depending on the size of the driveway, this might take some time but it's a job that shouldn't be rushed.

A person cleaning a driveway using a patio cleaning nozzle on a high-pressure washer
Health & Safety

Please make sure you use all equipment appropriately and safely when following the advice in these D.I.Y. videos. You need to be familiar with how to use equipment safely and follow the instructions that came with the equipment. If you are unsure, you may feel it is safest to consult an expert, such as the manufacturer or an expert Bunnings Team Member.

Grave health hazards are linked to asbestos, which may be in homes built up to 1990. Health hazards may result from exposure to lead-based paints in older materials and copper chromium arsenic (CCA) treated timber. For information on the dangers of asbestos, lead-based paint and CCA treated timber and tips for dealing with these materials contact your local council's Environmental Health Officer. You can also use a simple test kit from Bunnings to indicate the presence of lead-based paint.