If your engineer said this:

And you got this:

Then you haven’t yet got this:
And you might get this:

So call this:
To get this:

And be this:
🙂
Because your Isolation Joint should look like this:

Not like this!!!

(Dum-Dum)
PS. Thanks to M.S. for the photos. Looks great now!!
Isolation joints installed badly can cause your house to crack. Just about every time an isolation joint is specified by an engineer it is specified correctly. SO builders and concreters are letting homeowners down.
Beware. Poorly installed isolation joints can cause a house to crack.
