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[SSLance]

Originally Posted by jlwdvm

Sounds like you know a little bit more about the composition of your slab....which helps.

Yeah, I built it...so I saw what was under it before it was poured and I knew what was poured..

You drilled sideways into the existing slab that was left and tied the new rebar into the old slab...right?

You'll be fine and I understand being concerned about the unknown in your case.

My main concern was actually hitting rebar while drilling the holes...which did happen in two cases. Cost me a $60 rebar drilling concrete bit to get those two holes drilled finally. Neither one was a direct hit though, both were about a half hit on the rebar.