I live in a terrace of three houses. It was originally an old large house which was divided into three modest houses. Recently, my next door neighbour had her roof re-tiled. I was away for a couple of weeks while this was going on. I recently found a leak right where our two houses meet. It turns out that the lead was removed from my section of the roof which has caused the leak.
I have spoken to my neighbour and they just act dumb and say it couldn't have been them. I don't know what builder they used for the job.
What course of action might I have. Is it technically criminal damage by the builder?