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Safe washing techniques for stunning, sparkling results

Pressure washing definitely makes outdoor cleaning easier, but get it wrong and you could end up accidentally causing damage. Avoid putting too much pressure on driveways, decking and more with this handy how-to guide.

cleaning decking

Point the lance at a 45 degree angle and hold 2 feet above your decking. You can lower it to remove stubborn areas, but keep it at least 12 inches above.

Use as low a pressure as possible to avoid splintering or damaging your decking. For soft woods, never go higher than 600 psi. For harder woods, go no higher than 1200 PSI (pounds per square inch).

Choose a cleaning head with a wide fan - 40 - 60 degrees is ideal. You can use detergent on stubborn areas, but let it soak in before cleaning.

top tip
Safety first

Clear your decking -
move any plants or furniture and give surfaces a good sweep. Any small debris could be sent flying by the water jet, causing damage or injury.

cleaning driveways

Degreaser and detergent will help shift grease, oil and other tough marks. If your pressure washer doesn't have a built-in detergent tank, you can use a spray bottle. Use an attachment with a wide fan or use a surface cleaning attachment. You can use high pressure on a concrete driveway, a PSI of at least 3000 is recommend. More caution is needed for paving as high pressure wears the sand that holds tiles together and can force them apart. Use a medium pressure and keep the lance at a 45 degree angle.


As with paved driveways, there is a risk of removing the joining sand and separating tiles if more than a medium pressure is used.
Keep your pressure washer at a 45 degree angle and use a wide fan. Don't follow the joining lines with the water jet - for example, use horizontally over vertical lines and vice versa.
To use detergent, wet your paving first on a very light setting. Add the detergent, leave for 5 - 10 minutes, and then wash off with a medium pressure.

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