My neighbour has put screws in to a wall that is part of my shed, it is this bit of T&G rotten and in need of replacing soon he has also used too longer screws that are sticking out 3-4mm. He has also drilled in to my garage concrete wall. on top he also used foam on top of my shed to fix a gap. does he have to ask permission to screw in to my property? also when we come to redo the roof and T&G i hope he is not gonna cause problems. if he does and stops us what do we do?