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Question posted - October 6 to October 10, 2014:

What criteria should be used in deciding between a liquid-applied and a sheet-applied air barrier?



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Selected Answers

From ROY CANNON of Pecora Corporation on November 3, 2016:
With so many manufacturers and offerings available, a general analysis of cost vs. performance would be applicable. All criteria for selection noted in previous comments are important with one very relevant component missing, that being the support and training provided by the manufacturer throughout the entire process. This would include the selection and submittal process to installation to issuing of the manufacturer's warranty. A manufacturer with an ethical technical staff who will take the time to objectively go through the selection process with you is invaluable. This would be especially true for specifiers early in the design process as well as contractors who may be limited in availability of specified products, as it's never too late to get the right product approved.

From aaron g of VaproShield on November 11, 2014:
Criteria of selection include weather, especially cold and wind; worker safety; primer feasibility; VOC content; interfaces;  installed costs of the system; long-term performance; UV stability;  the type and characteristics of the cladding system, i.e., open joints; and the warranty.

From Lori Gunderson of Hallmark Building Supplies on October 17, 2014:
Do not forget weather and project performance criteria. Some weather barriers need to be detailed to meet ASTM 2357 air barrier requirements.

From Bob Craig of Lohse2 on October 10, 2014:
Criteria include the type and condition of substrate, the required speed and ease of application, the durability related to exposure, adhesion characteristics,  compatibility with adjacent components, permeability, price, and warranties.


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Tagged categories: Barrier coatings


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