Testing at the correct depth: 40% versus 20%

40% depth of slab thickness is required for slabs drying from one side.

This occurs when:

  • the slab is poured on the ground
  • poured in a casing (metal pan deck) that doesn’t allow concrete to breathe

20% depth of slab thickness is required for slabs drying from two sides.

This occurs when:

  • the slab is poured above ground
  • the slab can breathe from top and bottom

Please visit 40%: WHY TESTING AT THE CORRECT DEPTH IS CRUCIAL and WHEN 20% IS THE RIGHT DEPTH FOR RH TESTING for more information.

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Wagner Meters is a family-owned American business that aims to provide solutions in moisture measurement technology that will enhance the quality and value of each customer's project. With an almost 60-year legacy of innovation, Wagner continues to be a resource for both individual craftsmen and high-performance commercial endeavors.