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I always use sand ever since Unilock stopped honouring it's warranty on the stone if using limestone screenings. I find sand locks the stone in far better than screenings, makes for a much smoother finished surface after packing and has much less chance of failure. Every job that I have had for a relay over the years has been installed on limestone screenings. Also the limestone eventually disintegrates the concrete of the pavers. On very old jobs I have seen pavers that have decomposed on the bottom so badly that they were only 1/2 their original thickness.
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Life should NOT be a journey to the grave with the intention of arriving safely in an attractive and well preserved body, but rather to skid in sideways - Beer in one hand - Nacho's in the other - body thoroughly used up, totally worn out and screaming : Woo Hoo, what a ride!
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