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May 15 - May 21, 2016

What should be considered when deciding between liquid-applied and a sheet-applied air barrier?

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From ROY CANNON of Pecora Corporation on May 17, 2016:
Performance vs cost would be a good place to start. The variables to consider are numerous in both types of systems. The versatility of fluid-applied materials is one area of consideration that a sheet applied wrap cannot match, along with the "seamless" end product of a fluid applied "system." And, as one might expect, the challenge with both systems is in the details, ie., penetrations, transitions, window and curtain wall perimeters, wall to roof, foundation to wall,and other details. The not so obvious variable is the quality of technical service provided by the manufacturer, which can be the most critical performance property of all. I would highly suggest getting a "feel' for the technical service offered by the manufacturer by reaching out to them for assistance in addressing any concerns or questions you may have.

From Philip Kabza of SpecGuy Specifications Consultants on May 16, 2016:
Now that both types offer vapor-permeable solutions, the variables to consider include: what types of penetrations and edge conditions are occurring; what is the extent of uninterrupted wall for application; what are the site conditions for labor access; what is the availability of installers and their skills. No matter what type of air barrier, it will only be as good as its inspection.

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