On Oct 22, 6:23 pm, "HeyBub" wrote:
Steve Barker wrote:
They look normal to me. Concrete cracks.

But if it has rebar it doesn't separate.

My builder used fibre reinforced concrete-no rebar.My patio door is
not square and he told me he can adjust the rollers.I tried that and
one of his 'handymen" tried with no success.He pretty much is refusing
to fix anything.