On 5/12/2017 10:44 AM, Michael wrote:
In a stone and clay crawl space, digging down I hit concrete along the
wall? How far from wall should I go through it so as not to risk the
foundation
footing? I'll have to rent some kind of jackhammer to get through it.
Jackhammer seems to be a brute force method.
Is there no other way, like a vent hole?
How about a concrete drill?
Directional drilling under the footing?

If a contractor said he was gonna use a jackhammer
to poke a 1" hole thru my foundation, I'd go rent
a different contractor.