Moisture barrier between the sole plate the concrete slab.
Vapor barrier framing a basement wall against concrete.
Before framing the walls of your basement install a moisture barrier to prevent water and moisture from entering the wall cavity.
Also be sure to use treated lumber for the bottom plate on the wall framing.
A vapor barrier against the concrete surface is generally recommended before wood framing or flooring materials are installed.
Here are three different types explained.
Very hot and humid climates may benefit from an exterior vapor barrier that keeps outside humidity from penetrating into walls.
These plates must be made of pressure.
That is if the studs are going to touch the concrete wall.
In winter the dew point of the interior air is typically about 50 f assuming an air temperature of 70 f and a relative humidity of 50.
The other option is to set the 2 4 wall framing in 4 from the masonry or concrete basement walls and use just the vapor barrier on the insulation facing toward the living space.
How to frame an inside wall against a concrete wall.
1 on the interior wall between the heated and unheated portion of the basement i would not use with a vapor barrier.
So make sure the framed wall has a gap between it and the foundation wall.
You also don t want the wall studs to come into contact with the foundation wall.
The cool concrete wall causes the humid air in the basement to condense on the surface.
This moisture will wick into any lumber that comes into contact with it.
Or you can leave a 4 inch gap between the studs and concrete wall and probably get away with it.
Masonry walls like concrete tend to be damp dreary and unpleasant.
Most jurisdictions require a 4 mil plastic sheet vapor barrier for basement walls against concrete.
The main concerns are condensation and drying potential.