Cheers everyone. All views and humour greatly received. I think I will try to persuade her to go to the two brick thickness method, but if that fails I will trust in Woody's assessment that the construction method is fine. (thanks Woody).
Ok ... Cheers Tony....but I have to try and be diplomatic with her. What can my argument be against her proposed method and can you suggest what she should be doing.
My neighbour intends to build a freestanding, single skin (4") brick wall. It will be 24m long and 1.8m high.
She tells me it will be built on suitable concrete foundations and there will be one and a half brick piers set at 2m centres (13 piers). These piers will be either 2 or 3 bricks higher...