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How to pressure wash block paving

Date posted: 7 March 2015

Unquestionably, block paving can give a refreshing, more organised look and transform any driveway, patio, or garden. The usual cleaning methods include 3 phases:

  1. Weed-removal phase
  2. Dirt removal phase
  3. Cleaning up phase

Many people use a scrubbing brush and a mixture of liquid soap and water to clean their paving. However, it is definitely a tedious task. Alternatively, pressure washing is an excellent way to clean block paving with heavy dirt fast and easily, and quite effortlessly, as well.

In order to master pressure wash block paving, here is a list of the tasks involved.

1. Pre-Washing

First and foremost, sweep your block paving thoroughly with a stiff broom so any debris (e.g. stones, old cement, etc.) is completely removed. That way, you will avoid debris flying off when they are hit by the jet of water plus you are sure debris won’t have an abrasive effect on the paving blocks.   

Useful Advice:

In case you have applied a weed killer to the moss, give it a couple of days to act and then you can start pressure washing your block paving.

You can avoid unnecessary damage to the underlying grit sand base that the entire block paving is based upon, if you avoid pressure washing from overhead, and directly to the paving joints.

You can discourage the weeds from growing by brushing your block paving on a regular basis and dislodge any new growth. That way, you will always have a clear-looking paving!

2.Cleaning the Block Paving

A good idea to avoid having dirty water running onto your cleaned paving area is to start pressure washing at a corner above the area where the dirty water runs off, and walk your way across the paving, avoiding splashing windows and doors with dirt. 

When pressure washing your paving try to direct the water away from neighbour’s properties, cars, and buildings. 

Once you got your paving block cleaned, allow to dry before you start re-sanding the areas where the jointing sand was lost. Then proceed to the next phase, where you need to spot any areas that might have come loose after power washing and re-point them with cement, in order to maintain your block paving’s structural integrity.

Maintaining Block Paving

  • Clean your block paving with a good detergent and a stiff broom at the start of Spring, and finish by applying a proprietary weed preventative that will keep the weeds off from growing between the joints of your paving block. 
  • Always re-sand and re-point any joints that you see damaged after using a cleaning product.
  • Try to pressure wash your block paving by angling the water to the paved surface at 30° tops and spraying diagonal across the paving joints. 

Related Pressure Washing Articles

Power cleaning techniques using a pressure washer

Pressure Washing Guide - Which psi do I need?

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