It is from within the concrete itself which with an excess of water is required to.
Fixing moisture problems concrete slab.
Many moisture problems in new slabs can be mitigated by mechanically profiling the surface says nicasio.
Remove rotted wood after removal we could see the moisture trapped between the wood and concrete floor.
Moisture problems with concrete slabs by peter craig moisture related floor covering and coating problems have in recent years become among the most common and costly issues being faced by design professionals contractors manufacturers installers and building owners.
Inadequate water drains off from the building.
Concrete cracks the concrete cracks the moisture comes right up through that crack.
Solving the problem with new slabs moisture most often means that the slab isn t rid of all its water of convenience yet.
Admixtures as discussed do not dry out the slab they just hold the water in.
The number of primer barrier layers is based on the amount of moisture present in concrete.
Fixing moisture problems in concrete slab sources of moisture in concrete.
Waiting another day can be a simple valid solution much of the time when you have the luxury of time.
A low permeance vapor.
Then there are admixtures that are self desiccating and they will help dry out a slab there was a presentation at construct about it.
Causes of moisture accumulation in concrete.