I would use whatever I had available so long as it looked right. Gravel's gravel after all.
So even the decorative gravels, like the Solent Gold gravel or the white angular chip?
I would use whatever I had available so long as it looked right. Gravel's gravel after all.
Personally i use mortar not too strong, about 6 grit sand to 1 cement and make it about 20mm thick.
Make sure you hammer the blocks down into it well though.
Its only for final levelling so not imperative just don't go laying it on a deep bed of sand. 30mm or less if fine. If you need more than 30mm then your type 1 base has not been prepared well enough.
they are all fine
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