Hi, some help please from those that know! I have a stable block, 12 metres long. I want to put a concrete slab along it, and out about 3 metres. I can install formwork along three edges, but how do I tamp the cocrete along the edge of the stables without formwork? Should I put in formwork along the edge of the stable wall, and remove when the concrete has dried, then make good with new cement? I want to make a good job so help would be appreciated!