There engineer will double check the records of what was done to assure his clients the the building is safe and sound. And if your work caused dammage upstairs, you can expect to pay for it.
Bridgeman: Home owners hire engineers usually as a last resort to get their work done and have no idea what should be in the scope of work for him.
We have had engineers on the first visit to a job set a laser in a window sill and check the level of the floor as well as looking at structure, loads, foundation and footings and his report which are instructions for the contractor will have the measurement of the floor and ceiling in the area of the work in relation to that window sill.
In the case of a claim that a structure moved, he will have a record of where it was before and after the job.