The thick and thin of fluid-applied air barriers

The fluid-applied air barrier (FAAB) concept was originally a Canadian-developed technology from more than 40 years ago. Back in the early 1970s, the genesis was an adhesive combining air- and vapor-retarding characteristics—eventually, this material would find its way into building codes.
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Understanding heat, air, and moisture control

Many designers and specifiers understand controlling air, vapor, and thermal transfer helps mitigate moisture problems within the building envelope. Moisture accumulation is a performance adversary that can lead to structural deterioration, finish damage, organic growth, and reduced building longevity.
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Sound-deadening with Sprayfoam: Adding unexpected value with SPF

Insulating walls with low-pressure sprayed polyurethane foam (SPF) is a common practice among builders and architects for various reasons—such as increased energy efficiency, structural support, and overall comfort. One of the ways SPF can increase the comfort of a structure is through the material’s sound-deadening properties, which contractors can...
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Durability of water-resistive barriers

Many new water-resistive barrier (WRB) products are being introduced, including liquid-applied membranes. These new products join traditional wraps, self-adhered membranes, felts, and building paper, making for a crowded marketplace. A WRB will be concealed behind cladding, where it cannot be inspected, maintained, or replaced, so it must last for...
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WRB: Water (or Weather?)-resistive Barrier

FAILURES
Deborah Slaton, David S. Patterson, AIA, and Jeffrey N. Sutterlin, PE

Using the acronym ‘WRB’ is common, but the intended meaning is often misunderstood, as it can refer to either a ‘water’ or ‘weather’-resistive barrier, with the two having different performance expectations.

The 2012 International Building Code (IBC),...

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Air Vapor Barriers: When in Doubt, Box it Out

FAILURES
Deborah Slaton, David S. Patterson, AIA, and Jeffrey N. Sutterlin, PE

Air vapor barriers (AVBs) are critical in controlling air and moisture transport within building enclosure assemblies. Ignoring bulk water penetration, moisture-related issues experienced within the building enclosure are more commonly the result of moisture transport through...

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