Concrete slab moisture can cause problems with adhesion of floor-covering material, such as tile, sheet flooring, or carpet and bond related material failure of non-breathable floor coverings. Many adhesives used for installation of floor coverings are more water sensitive than in the past, due to restrictions on the use of volatile organic compound (VOCs).

Condensation

Moisture migration through the slab from wet soil under the slab

Broken or leaking pipes buried below or in the concrete

Surface water from leaks or flooding collecting on the concrete

Inadequate bond

Moisture prevents or retards setting of water-based adhesives

Weakening of the bond of previously set adhesives

Growth in tile resulting in peaked joints or curled tile

Discoloration

Salt (alkali) deposits at tile joints

Blisters in sheet flooring installations (When blisters form immediately after installation, they are normally associated with air. When a period of time passes before blisters form, they are usually a result of moisture in the slab.

Bleeding of adhesive through the joints of tile

Shifting Tile

Installation of a vapor emission control system. These systems are very popular and come with a 10 - 15 year warranty.