i have just had a new bay window built as the old one had damp problems, they have cut back the patio slabs and dug down for new footings, the new wall goes down lower than the patio and there is only a very small gap between the patio slabs and the new wall is this correct? all around the conservatory and along the back of the rest of the house is a gap quite a lot bigger and with small stones in the gap, it is not finished, the roofer and windows are coming on Monday so any suggestions would be much appreciated before then as i am unsure if this is wrong or not and would want to query it with them before anymore work is done.