Exactly that! Your best bet is to shutter all sides with 4×2 timber set to the correct angles and tamp down the wet concrete with another lump of 4×2.
just had a thought, how permeable/environmentally OK is that? does it not shed rainwater?
A concrete slab ignores all the requirements of Sustainable (Urban) Drainage Systems, SuDS.
@fizzy.bleach started
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Exactly that! Your best bet is to shutter all sides with 4×2 timber set to the correct angles and tamp down the wet concrete with another lump of 4×2.