Vapor barrier or not?

[naturalgas]

Need advice on vapor barrier or not under slab?
http://www.garagejournal.com/forum/showthread.php?t=314545


Sent from my iPad using Tapatalk

 

[dreamingmuscle]

Yes vapor barrier

 

[joe--h]

Yes. Won't pass inspection without it.

 

[barks]

Why not is a better question.