What can I do about a sunken block paved driveway?

Question

Hey there, I had a block paving installed in my driveway some six years ago but it appears to have sunk by now; do you know why this has happened and what can be done about it? Should I hire a professional?

Eugene · Accepted Answer

It needs that area lifting to check the sub base to see what has sunk dig out to make sure  you haven't  got a broken  pipe  in that place then reinstate with new type one sharp sand then blocks

Danny · Answer

Wherever it has sunk, it needs more hard-core put down, levelled off with sharp sand & replaced.

Hughie · Answer

It's all to do with the sub-base most common thing on block paving drives is sinking if u don't have a good solid base hire a professional best option

David · Answer

The sinking is most probably caused by not dug out enough and hardcore up to sufficient depth and whacked down correctly I advise to lift the sunken areas lay new sub-base whacker down so solid to a min 300mm then relay block paving making sure you have a breathable membrane down to prevent weed and grass coming through in the future

Gavin · Answer

Hi maybe the sub-base underneath has failed over time it will need lifting up where it has sunk and more hardcore put in re-sanding and laying back down hope this answer helps you remedy your issues

Noel · Answer

Wear and tear over the years the best solution is to take it out and redo it again unfortunately you don’t have any order option

Joshua · Answer

This thing happened all always after 6 years because of solid moving and because of water, one thing you can do instead of 150 cm of hardcore you supposed to do 200cm of hardcore  then  is last longer

Peter · Answer

Obviously, there isn't enough hard-core underneath. Need to lift the sunken area and check the sub-base add more if required and compact then relay blocks

James · Answer

You can cut out and repeat it then pant with bitumen

Lorcan · Answer

It could need lifting and more hardcore and compacting doing

What can I do about a sunken block paved driveway?

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