Concrete Vapor Barrier Video
Hi, I'm Tim Carter from AsktheBuilder.com and I am here on the job site today. It is real pretty cool as they are getting ready to pour a concrete garage slab in just a minute.
But first I want to show you one part of the slab that is really important and it is something you might forget if you are doing some concrete work. Look at this. What you are seeing is a big black sheet of plastic. This goes underneath the entire slab, it's thin and it goes everywhere. The purpose of this vapor barrier is simple. It stops the water vapor from the soil from coming up through the concrete. It might be hard to believe but water vapor goes right through the concrete and it will make the inside of the garage damp if you don't have it.
Make sure you have a good vapor barrier under your concrete slabs.