years ago I laid a raised patio by simply bedding the flags on top of 2inch of stone chippings and 2 inch of sand.this lasted but over time it has sunk in places a little.
I have started to relay the flags by bedding them on 1 inch of a 5 to 1 mix of what was sold to me as concreting sand and cement.
The mix has no water added to it.
This is of course on top of the well compacted bed that was still there.
I assume the 'concreting sand' is sharp sand but it does seem very gritty is there a difference please.
Is this method ok to use please?, the ones that have been down a few days seem very solid.
I would be grateful for any comments.
Re-laying raised patio
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84-1093879891
There is no real difference between concreting sand, grit sand and sharp sand - it's all down to local terminology. There are technical classifications for sands which you can read about on the Aggregates page, but, for yournpurposes, a sharp, gritty, concreting sand will be fine. :)