I have a crack in the foundation visible on both sides, interior and exterior on an older home (built in 60's). In my case the foundation does not seem to be sagging.
I have received some advice suggesting that patching it might be enough.
However, I see a lot of sources pushing crack repair kits that cover the a cement foundation crack with epoxy, leaving injection ports, then filling the crack with polyurethane or epoxy.
Is this the de facto way of doing it now?