However, we have also noticed holes in our mortar, and that the plumber must've made an error and cut into our slab ande changed our pipes for our kitchen sink.
We have been told by others that this should never happen and could void our warranty, however, we had no idea of it.
We are waiting to see what is going on. Here are some pics
sarking from back of house
tiles from the back of house
hole in brickwork, we have found others too