My early victorian building has a nice stone facade covering what looks like a messy mix of mortar and rubble.
I want to fit a combi boiler and need to drill a 10cm hole for the flu pipe. How can I neatly cut such a hole through this type of wall ?
My neighbours did this recently but it seemed that the builder took three days and from the appearance and size of the resultant hole he must have done it with a pick axe! I would like to be somewhat tidier.