- The actual amount of time required to sufficiently dry concrete in a fast-track world. You can only dry concrete "so-fast" before the slab starts cracking, curling and exhibits other potential problems.
- Concrete that is value-engineered or whose water-to-cement ratio (0.50 or higher) is too high to allow for a quality slab that will dry faster.
- A slab without vapor retarder/barrier or one that has an inadequate vapor retarder
- Drying time extended by curing and sealing compounds on the surface of the concrete. These compounds are designed to hold the moisture in the slab for hydration purposes.
Is the underlayment porous or non-porous?
How thick is the underlayment?
How is this underlayment going to affect my adhesive?