If we heard any noise we banged on the wall/ceiling with different objects to make different sounds and, I think, generally made life very nerve racking for rats who apparently hate new/different, sights, sounds and smells............
How right you are. I had a new kitchen and bathroom fitted earlier this year, the noise of hammering and the workmen shouting to each other, which went on for over three weeks, cleared the house of all patters, scratching and rustling.
The downside was everything from the two rooms ended up in the living room. I reckon I had a 3x5ft area of space, all I needed was a skeleton in the corner and Steptoe could have called it home.