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How to account for settling of new slabs in the middle of existing patio

Discussion in 'In the Garden' started by OldKettle, 12 Aug 2021.

  1. OldKettle


    17 Jul 2017
    Thanks Received:
    United Kingdom
    I have a patio which is approx 9 metres by 5 metres, but which had two brick planters built into it (either side of the centre). I have now removed the planters which has left me with two spaces that are exactly 2 slabs by 2 slabs, and I have a number of those slabs available. I therefore plan to fill the gaps with those slabs.

    I am going to put in a 100mm MOT base and then 25mm of slab layer, but my concern is that I am adding new slabs in the middle of a long established patio and that I may need to account for settling.

    The slabs are concrete 600x600x45.

    I suspect that I can get the MOT tamped down sufficiently that settling won't be significant, but I am more concerned about compression of the slablayer (or perhaps even expansion when hydrated).

    Just wondering if anybody has any pointers on minimising any problems.

    Any thoughts would be much appreciated.
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