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Hints & Tips

Filling Gaps Between Paving Slabs

Filling gaps between paving slabs not only makes your life easier by making cleaning easier, it can also make your garden or driveway look cleaner and neater.

Check out our top tips below for filling gaps between paving slabs, to keep them looking new for longer!

filling gaps between paving slabs

Prep and clean the space properly

This is incredibly important to ensure the grouting/paving sand lasts longer. The more dirt you can remove before you begin, the better your results will be.

First, use a trowel to clean out all the gaps between your slabs, being sure to clear out all weeds and rubbish. Then, brush whole area clear with a yard brush.

Using Dry Grouting

Tools you’ll need


  • Use a completely dry surface
  • Put together a 4:1 (though some use 3:1) mix of builders sand and cement (do not mix with water!)
  • Brush across the whole area using a softer brush, filling all slab gaps evenly
  • Compact the mix into the gaps with a trowel
  • Repeat as above until all gaps filled and mix brushed off slabs
  • Spray area with a light mist from the hose to dampen the mix, activate cement.

Pros and Cons of Using Dry Paver Sand/Paving Grout

  • Pro: Less likely to cause staining than wet grouting as there is no water to bind it to the surrounding slabs.
  • Cons: This method rarely fills gaps thoroughly. Plus, you must ensure slabs are 100% dry so is only really practical in summer on a dry day

Using Wet Grouting

Tools you’ll need

  • Firm yard brush
  • Soft brush
  • Watering can/hose
  • Pointing trowel
  • Bucket
  • Wet mix


  • Soak the entire area to be filled with a hosepipe, spreading the water across the whole area with a yard brush
  • Mix sand and cement (3:1), with water until you get a fairly sloppy consistency you can brush easily across your paving
  • Pour onto the paved area and work into the gaps with either a soft brush or an old squeegee
  • Ensure you get the wet grout off the paving slabs into the gaps as much as possible to avoid staining the paving slabs
  • Repeat as above until all gaps filled and you’ve brushed all of the mix off your slabs.
  • Once this is starting to set, wash the area with a light mist using a hose to clean the slab surface.

Pros/Cons of Using Wet Grouting

  • Pros: Quicker than dry grouting and less reliant on dry weather
  • Cons: Can lead to staining if slabs are not thoroughly cleaned

That’s all our top tips for filling gaps between paving slabs! We hope you get your paving slabs looking tip-top!

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Zoe Allison

Zoe Allison

Writer and expert