Not every wall does.
Vapor barrier over concrete wall.
Below grade walls and floor slabs transmit ground moisture through concrete walls or slabs.
After the insulation is in place you will want to add a vapor retarder sometimes called a vapor barrier if you need one.
A vapor barrier s job is to keep water vapor in humid air from diffusing through one side of a wall and finding a cool surface inside the wall.
New generation vapor barriers made from the highest grade virgin polyolefin resins have been developed that are considered true below slab vapor barriers or concrete vapor blockers.
Vapor barriers are a way to keep moisture from getting into the concrete.
Whether or not you need a vapor retarder hinges on three main factors.
Crawl spaces benefit from a polyethylene moisture barrier placed directly over the exposed earth.
Since warmer air has more moisture vapor will move to.
A vapor barrier is not the same as an underlayment.
This is why a vapor barrier under concrete is essential.
By nature vapor travels from areas of higher concentrations to lower.
How to glue a vapor barrier to a cement block wall.
If you have a concrete floor that s in continuous contact with a source of moisture you re going to have problems.
When a vapor barrier is on the side of a wall where the dry air is i e outside in winter or inside in summer moisture problems can occur.
A vapor barrier reduces the movement of water vapor by.