Concrete Slab Foundation Moisture Problems

The means are at hand to thwart operational disruption in these buildings.

Concrete slab foundation moisture problems.

A concrete slab on ground is the heart of an industrial facility. Each year such problems account for hundreds of millions of dollars in unanticipated expenses to correct problems and resolve disputes. Moisture problems in concrete slabs old and new can play havoc with decorative concrete projects and other flooring strata in several ways including bubbling blistering and blushing of color. It is from within the concrete itself which with an excess of water is required to.

Inadequate water drains off from the building. If there is too much moisture in the concrete and an impermeable layer is placed over it the moisture migration can delaminate the coating sealer or overlay. One of the simplest most economical test methods for determining whether there may be moisture in concrete is the astm d 4263 concrete moisture test. Moisture problems with concrete slabs.

Duct tape an 18 inch square piece of plastic onto the exposed concrete and leave it for 16 hours. Fixing moisture problems in concrete slab sources of moisture in concrete. 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. Condensed moisture accumulation under the plastic at 16 hours can indicate a problem.

High shrinkage leading to excessive random cracking and curling and uncontrolled vapor transmission. It s commonly an interior problem because breathable products that reduce the threat are more commonly used in exterior applications. Sources of moisture in concrete rain snow and sprinkler systems are culprits on a work site open to the elements. The concrete slab can also absorb the groundwater below and around it.

These water sources increase in. A low permeance vapor. But the biggest problem for decorative concrete with a lot of moisture moving through a slab is the pressure it exerts at the surface. Thus the amount of natural groundwater has a.

Causes of moisture accumulation in concrete.