I warned to sound others out before (if) I speak to my builder. We have had a new garden wall erected. Breeze blocks, covered with white scratch render and a concrete coping on it. The coping are coping slabs. I would have expected them to be flush to each other. But there are small gaps of only a few mm between them. Doesn't this mean rain water will get into the expose brick that the coping is on? And it means rain will trickle down the white render of the wall - I thought one of the purposes of coping was to minimise the water on the wall?
Is what I am saying sound about right? If so I will mention to the builder.