In October 2020 we brought a 1930s semi-detatched house that needed work. When we brought it, it was full of cracks, mostly hidden underneath wallpaper, plaster crumbling down when wallpaper was removed etc. Most cracks were just from the old plaster, but there were a few bigger ones - including one that you can also see from the outside. When we took up the floor, it had a huge crackin the middle which made the floor higher in the middle.
Anyway, since then we have been doing a lot of renovation work. Taken down a chimney and rebuilding an internal wall, putting in steel for structure (just once), then also battening out the ceiling and walls in the bathroom and kitchen. Last week, we also installed our kitchen (which backs onto the neighbours property) so there was a bit of drilling into that joint wall, but nothing more serious that just hanging up a frame.
The neighbour at the weekend came round and asked us to take a look at her property - she found a couple of small cracks in her spare room (on the first floor, which joins onto our house) and is accusing us of it being our fault from the work we're doing and I guess, subsequent vibrations from the drilling. We have done nothing yet in the room opposite her spare room, but it is the same side of the house as the kitchen we just installed. She's also concerned that we're causing structural damage from all the renovations, and said that prior to us moving in, she had a survey done and the house was all fine.
My question is, could what we be doing actual cause structural damage? The most we're really doing is drilling into the walls and ceilings to put up wood or plasterboard, and I think it probably sounds worse to her than it actually is. But I'm also now concerned that she could accuse us of doing something that is damaging to her house, when we think it's likely just because the houses are old and she's maybe now more aware of what's going on. Our house was in such bad shape it seems unlikely hers wasn't