On Fri, 29 Aug 2003 20:17:30 +0100, Jo
wrote:

My early victorian building has a nice stone facade covering what
looks like a messy mix of mortar and rubble.

What sort of stone is it? My house is uncoursed random limestone, 2
foot thick, and one problem with using a core drill as suggested is
that although the inner and outer faces of the wall are firmly
mortared in place, the middle of the wall is loose rubble fill. I can
see this loose fill causing problems for any drill.
When my boiler went in, I removed the stones to make the hole then
rebuilt around the flue (with quite a bit of expanding foam in the
middle. The hole wasn't that much bigger than the flue though and was
probably around a mornings work.

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.





--
John