Brewery Lane, Gateshead, Tyne and Wear

North East Paving And Gardens is community supported. We may earn a small commission through links on this page - Read More

How to Jet Wash Block Paving Correctly [The Ultimate Guide]

Power washing your block paving is a great way to keep it looking fresh and new. Not only does it remove dirt, algae, and lichen, but it can also revive faded or dirty blocks.

This guide will show you how to jet wash block paving like a pro. Keep reading for tips on preparing the surface, choosing the right equipment, and avoiding common mistakes.

Is Power Washing Block Paving Safe?

In short, yes. You’ve probably been warned about the dangers of power washing block paving.

The truth is, as long as you follow our tips below, there is no reason why the odd jet wash should cause long term damage to your block paving. Just make sure you have the correct tools for the job and wear protective clothing whilst working.

Our Key Advice Before you Begin Jet Washing Block Paving.

Don’t remove joint sand too deeply.

The main concern when pressure washing block paving is the potential loss of jointing sand between each block. This vital element of block paving, also known as kiln dried sand, provides the necessary friction that holds each block in place. Loose too much of it, and you risk damaging the structure of your driveway.  

We recommend using a brush to remove any weeds, moss or debris from the paving bricks before using a power washer on your block paving.

Not only will this help when pressure washing a block paving driveway, but it will also make sure that your joint sand is firmly compacted between the blocks. This will result in less sand loss and help maintain the stability of your block paving.

Pressure washing block paving too often is bad.

We’ve all seen the beautiful results of a fresh pressure washed block paving driveway. Whilst we understand that this sense of accomplishment is great, pressure washing your block paving too often can cause permanent damage to the joints and colour loss to the pavers. 

We advise pressure washing block paving once a year. This is the best way to clean block paving without overdoing it.

Use the pressure washer lance at an angle.

The key to jet wash block paving, and minimising damage during the cleaning process, is to make sure you’re holding the jet washer hose at an angle whilst working.  

We recommend aiming the lance at a 45-degree angle to lessen the force of the high-pressure water jet on the joints and blocks while cleaning. 

Remove weeds prior to jetwashing paving.

To achieve the best results when you pressure wash block paving and ensure an even clean across the entire surface, you should remove any weeds and moss before washing. 

You may choose to apply weed killer to help complete the job quickly, but be sure to wash this and any other cleaning products away before using a power washer.

Gently pull any weeds by hand, or take care lifting them up and away from your paving with the use of a garden hoe. This will prevent any unnecessary damage to the paving joints and keep your driveway free of any loose debris that could cause harm. 

This video shows a handy DIY method for removing weeds.

Our 3 step guide on how to clean block paving with a pressure washer.

Step 1 – Prepare the Area

As with any important job around your house and garden, preparation is key to a job well done. Take time to sweep away any dirt or debris and use a stiff broom to compact the jointing sand.

Gently pull up any large weeds and moss, and remove any garden furniture from your driveway or patio area prior to performing a pressure wash. 

If your driveway features a drainage channel, be sure to remove any blockages before you begin working.

Step 2 – Work Inwards

To guarantee you’re not overworking any one area when you pressure wash block paving, you should always work inwards from the edges of your driveway.  

Once the block paving is prepared for cleaning, wash down the perimeter and work your way around the area in a methodical manner, taking care to face away from any doors and windows. Working this way, moving gradually inwards, will give you a much better clean and less cleaning down.  

Step 3 – Sweep the Water

We’ve found that taking the time to brush off any excess water on the surface of your block paving as you work allows you to better spot any small area you may have missed initially. 

When your driveway surface looks particularly wet, use a brush to remove all the water and note any areas that may need more attention. As always, make sure you’re cautious of overworking the joint sand.

Unfortunately, some moss, algae or discoloured spots may be too stubborn to remove entirely, so be careful when cleaning the affected area. 

How Do I Remove Nasty Spillages?

Oil stains?

Oil can be a nightmare to remove from otherwise clean block paving. Unfortunately, oil is absorbed into the stone blocks themselves, meaning any surface-level scrubbing may be ineffective at fully removing the stain.  

Thankfully, there are ways to rid your block paving of nasty spillages, but it will require specific cleaning products.  

Check out our guide of the best oil removers on the market here.

How Do I Treat Efflorescence?

You may have found a white stain on your block paving or brickwork; this is efflorescence. Visible as a white residue, efflorescence is a build-up of salt deposits in the surrounding atmosphere. 

Pressure washing alone will not adequately remove this stubborn stain, so it can actually be cost-effective to purchase a dedicated efflorescence remover.

If you want to learn how to clean monoblock or clean paving blocks from this unsightly stain, try reading our guide on the most effective efflorescence removers here.   

Frequently Asked Questions About Jet Washing Block Paving.

Do I need an outside tap for pressure washing?

While an outside tap is the best water source for a pressure washer, not all models require one.  

If you’re considering an alternate water source, the three main questions to ask yourself are: 

  • Is there enough water available at the source? 
  • Can the source provide adequate high pressure? 
  • Does the source produce clean water?  

The average pressure washer uses around 2.5 gallons of water per minute. If your source can meet that demand, you’re not using dirty water, and your pressure washer pump can produce enough power to draw that water from the source, then you will not require an outside tap. 

What PSI is needed to clean pavers?

Generally, to avoid damage to your paving slabs and limit the need for future re-sanding, we recommend pressure washing a block paved surface at a psi of 1500 – 2000. Here is a list of good pressure washers to use on a driveway.

Last Word

You should now know how to clean paving blocks with a pressure washer, so it looks new. Pressure washing your driveway will bring back its original shine and get rid of any dirt, grime, or moss built up over time.