Drilling "no fines" walls

[richard7761]

I live in a "no fines" house. That means the outside walls are made of large-ish pebbles (no fine aggregates) with verly little cement in-between. In fact there are many voids in the walls. Depth about 220mm.

Can anyone, with experience, please tell me how I would drill say a 38mm hole through such a wall?

I guess I'd use a regular diamond hole saw. Any tips to offer? Thanks.

 

[richard7761]

Council in about 2003 cut this 135mm diameter hole thru no fines wall. I would guess great accuracy was not important in the position of hole.

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• richard7761
• 11 Apr 2015
• 1

 

[Deleted member 174758]

I would guess great accuracy was not important in the position of hole.

You won't get accuracy with no-fines walls unless you use a core drilling rig bolted down - within 5mm is about the nearest anyone can normally get! Horrible stuff!