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 or call (844) 829-3335 to talk to a professional.