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Ask your QuestionHey 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?
Asked by Greg on 14th Feb 2022Best 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"
Answered on 14th Feb 2022 - Member since Feb 2022 - report"Wherever it has sunk, it needs more hard-core put down, levelled off with sharp sand & replaced."
Answered on 14th Feb 2022 - Member since Jan 2020 - report"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"
Answered on 18th Feb 2022 - Member since Jan 2021 - report"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"
Answered on 16th Feb 2022 - Member since Sep 2021 - report"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"
Answered on 14th Feb 2022 - Member since Feb 2018 - report"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"
Answered on 21st Feb 2022 - Member since Feb 2022 - report"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"
Answered on 14th Feb 2022 - Member since Sep 2021 - report"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"
Answered on 14th Feb 2022 - Member since Nov 2021 - report"You can cut out and repeat it then pant with bitumen"
Answered on 16th Feb 2022 - Member since Mar 2021 - report"It could need lifting and more hardcore and compacting doing"
Answered on 14th Feb 2022 - Member since Jan 2022 - report
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