Core drilling pebble-dashed wall

[Cursitor Doom]

Anyone done this? I need to make a hole (approx 3-4" dia) through an outside wall to fit a ventilation grill. The outside skin is pebble- dashed, though. Any tips as to how best to proceed?

ta.

[stvlcnc43]

Fit the core drill to the machine, hold the pilot against the wall, pull trigger and push.

[newshound]

Do it in both directions. Assuming you need accurate positioning on the inside, do this first and once the pilot hole is through, go to the outside. You might need to knock off a few pebbles which intersect with the core drill circle.

[ARW]

+1