Because of shifting soil conditions and the high-quality epoxy flooring systems used in the construction of this facility, Hunton Brady chose Barrier-Bac’s VBC-350, 31 mil composite for use beneath the concrete slab-on-grade portion of this project.
In previous experience, standard vapor barriers without peel adhesion to concrete, resulted in poor performance with high-end flooring.
Vapor barrier “pocketing” occurs when the vapor barrier separates from the bottom of the slab, which occurs during regular subgrade settlement, thereby forming areas between the concrete slab and vapor barrier where water condensation pools. The moisture then migrates upward through the slab, potentially damaging the sensitive flooring system. Facility was imperative to ensure the problem of vapor barrier “pocketing” would not occur. Specifying a composite vapor barrier with peel adhesion to the concrete was critical to protect this flooring.