I want to pave a large patio area which is at present a concrete slab. The slab is 2 courses below DPC and I understand that this level should be maintained. I intend to lay 38mm paving slabs using spot morta but I do not know what to do about maintaining the DPC level running along the building edge. Can I put some sort of channel or other method along the wall - say about 4" away from the wall itself so that rain cannot splash over the DPC. Hope this makes sense !
Any advice would be very much appreciated.