You are reading a single comment by @ffm and its replies.
Click here to read the full conversation.
-
That is why you weaken it by making "pilot" holes along the lines which you wish to cut.
"Stitch drilling" apparently.
If you use the cutter with a narrow blade you could effectively stitch drill with that as they're good at making plunge cuts. You may still need a chisel to get the plaster away from the brickwork though.
ffm
That is why you weaken it by making "pilot" holes along the lines which you wish to cut. I had concrete on the wall where I fitted my new fireplace, and I chased a cavity through the whole lot by drilling and chiseling.
Difficult to comment when you can't see the task in question though. You may well need a cutter as you suggest. But I still don't know how you'll knock the plaster away from the brickwork with just a cutter.