Opt for a gasoline-powered pressure washer over an electric model, which will mean dealing with electrical connections that need to be kept dry and out of the way during cleaning.
Most pressure washers come with multiple nozzle attachments.
Always test the least powerful nozzle first, then move to a stronger nozzle if you wish. Gas-powered machines will have a stronger spray than electric ones.
Only use detergent that is specified for pressure washer use. A narrow nozzle will provide a high pressure spray while a wider nozzle will have a lower pressure.
Patio bricks can also be cleaned with a mixture of oxygen bleach and warm water, in a ratio specified by the manufacturer. Keep pets and children away from the area while cleaning with harsh chemicals, which may be dangerous.
