Why Test For Moisture

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).

Sources for Moisture

  • 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
  • Problems Associated with Moisture

  • 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
  • Solutions for Remediation

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