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My Tobermore pavers are laid on 6mm bedding aggregate rather than sand. So far so good, easy to work with etc but I suspect that rain is successfully washing the kiln dried joint sand down into the aggregate sometimes as I keep finding random joints that were formerly filled have reverted to being a gap. I also suspect that this is only likely to happen when the sand is new, as over the years soil and other garden detritus will wash though the sand and bind it, but I don't want to keep pouring bag after bag into it to have it keep washing into the aggregate
I'm pondering on a strategy to counter this, either mixing cement into the KDS at a weak ratio, like 15 even 20 to 1.. or switching to using building sand and just leaving a large amount spread out indoors to dry it out, reasoning that it'll be less likely to get washed about in the rain than KDS does.
If cementing it I don't want it so strong that it makes damaged pavers hard to remove, nor locked in place so absolutely that it doesn't resettle and block up again if movement of a paver starts to occur..
Any thoughts or alternative proposals?
I'm pondering on a strategy to counter this, either mixing cement into the KDS at a weak ratio, like 15 even 20 to 1.. or switching to using building sand and just leaving a large amount spread out indoors to dry it out, reasoning that it'll be less likely to get washed about in the rain than KDS does.
If cementing it I don't want it so strong that it makes damaged pavers hard to remove, nor locked in place so absolutely that it doesn't resettle and block up again if movement of a paver starts to occur..
Any thoughts or alternative proposals?
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