EXTRA PROTECTION FROM
MOISTURE MIGRATION

Our patented 31 mil Composite vapor barrier with Non-Woven geotextile fabric lamination improves slab protection. The extra lamination creates a mechanical bond with concrete when placed with geo-textile facing the concrete pour (peel adhesion to concrete up to 8 lbs/in). This tight contact with the slab maintains the barrier, especially under expansive soil conditions where foundations may swell and contract.

Like all Barrier-Bac’s vapor barriers, VBC-350 exceeds Class A, B, C of the ASTM E1745 specifications.

APPLICATIONS FOR NON WOVEN
GEOTEXTILE FABRIC

VBC-350 offers extra cushion and tensile resistance for projects requiring extra protection from moisture migration. Typical uses include projects with expansive soil conditions, void formed slab, and high water table.

Clay, shale, or expansive soil swells when wet and contracts when dry. This repeated swelling and contracting causes cracked foundations, and instead requires special foundations and void forms.

The strong mechanical bond between the concrete and VBC-350’s Non-Woven geotextile fabric layer specifically protects against the pocketing common in these environments.

PREVENTING POCKETING

Pocketing occurs when a standard, surface vapor barrier separates from the bottom of the slab during regular subgrade settlement. Water condensation pools in these areas between the barrier and concrete slab, causing flooding and damage to flooring or equipment.

The mechanical bond created between the Non-Woven geotextile fabric and concrete at the time of the concrete pour eliminates the possibility of pocketing, making it the best choice for these soil conditions.