Vapor barriers are a way to keep moisture from getting into the concrete.
Moisture barrier for concrete subfloor.
The reason is quite simple.
With your concrete subfloor you will need either a standard foam underlayment with a moisture barrier film or a 2in1 underlayment with moisture barrier already installed.
When rolling out the moisture barrier you want to go from wall to wall and cover the entire floor.
The barrier comes in rolls about twenty four inches wide.
This video describes the process of installing a moisture barrier over a concrete subfloor.
Check the moisture level of the subflooring using a moisture meter.
You will lay the flooring lengthwise to this wall.
A vapor barrier is not the same as an underlayment.
For optimal moisture control you will want to overlap the poly barrier by at least six inches.
Vapor barriers come in two types 6 mil vapor barrier roll.
How to install vapor barrier on concrete floor under laminate flooring.
This is why a vapor barrier under concrete is essential.
If you have a plywood subfloor over a concrete slab check the moisture level of both floors.
A 6 mil vapor barrier blocks all moisture from the subfloor from ever reaching your flooring.
The presenter is using 6 mil thick poly barrier.
Snap the chalk line over the top of the concrete or moisture barrier between the marks on opposite walls making a cross in the center of the room.
Compare the results against the manufacturer s specifications for moisture limits.
Determine your starting wall.