Hi 
Need advise. 
1st time hack wall for my new home. Quite extensive hacking.. total about 3 pieces of wall gone... 
my neighbour a few units away (not immediate left or right or below), complained due to the vibration effects of the wall hacking, his wall tiles in his kitchen has damaged. I saw the damage and a small crack. 
I am wondering whether such things can happen? the owner happen to be ID so has explaining that this is quite common...  
I am just concerned whether i am being ripped...  
anyone has such similar experience?