On Thu, 12 Feb 2009 09:45:35 -0800, evodawg
wrote:

Davej wrote:

I've heard that hitting rebar with a diamond blade can quickly ruin it
-- so what do the experts do?

I usually cut concrete about an inch deep, hopefully rebar is deeper. Then
use a jack hammer to remove it. Cutting the concrete an inch deep just
keeps it from cracking beyond those cut lines. Sort of like a expansion
joint.

This is way we cut mine in a bath remodel. Used diamond blade for the
"relief cut (?)" , the a jack hammer.

Check to determine if the foundation has post-tension cables. You do
NOT want to cut one of the cables.