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Air Barrier Systems

In large structures, moisture laden air migrates into the environment from outside climate. This leakage has the ability to transport exponentially more moisture into and through the building enclosure than occurs through vapor diffusion alone. This moisture can migrate far enough into the assembly that it can be cooled down to a dew point, at which time the water vapor turns to liquid water. This liquid water corrodes metals in the building assembly, provides one of the ingredients for mold growth, and saturates building materials. This is why air barrier systems are essential in large structures. Air barrier systems are designed to stop infiltration and ex-filtration in the building envelope while allowing the transmission of water vapor, preventing condensation in the wall assembly. Moisture laden air leaking in from either the inside or the outside is barred from the entering the climate controlled enclosure an air barrier system provides. Mar-Flex has several Air Barrier solutions including the Air Barrier 1200™ and the Air and Vapor Barrier 1800™.

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Air Barrier 1200
Air Barrier 1200 Spec Sheet   Product Page

Mar-flex Air Barrier 1200 VP vapor permeable air barrier system is designed to stop air infiltration and exfiltration in the building envelope while allowing the transmission of water vapor preventing condensation in the wall assembly. Mar-flex Air Barrier 1200 VP acrylic membrane adheres fully to CMU, concrete, exterior sheathing and most other building materials. Acts as air and rain barrier Allows the diffusion of vapor Fluid applied Apply to substrate in wall assembly Watertight Low odor Low VOC content Can be appli...

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Air and Vapor Barrier 1800
Air and Vapor Barrier 1800 Spec Sheet   Product Page

Mar-flex Air & Vapor Barrier 1800 provides a seamless, 100% rubber continuous membrane around the building envelope. It is impermeable to air and vapor transmission. It can be applied directly to a variety of exterior surfaces. Acts as an air, vapor and rain barrier Very low vapor permeance (less than 0.08 perms) Watertight Position in wall assembly to prevent moisture condensation Low odor Can be applied to damp (or green) concrete Excellent elongation and recovery Seals around penetrations and brick ties Seamless mo...

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