If you were doing the job here you would probably need a scaffold, put up at great expense by a special crew. I sometimes find that on break through things go better if I stop, reverse the drill, and instead of pulling the bit into the hole and jambing, it beaks through smoothly, maybe I'm doing it wrong, but it works for me, specially with a battery drill with not quite enough power. Ian S C
Edited By Ian S C on 20/06/2016 15:01:34