A new technical bulletin from BASF Wall Systems describes a key test and two Acceptance Criteria that should be considered when evaluating air/water-resistive barriers. The purpose and procedures of each qualification are concisely outlined. Results of tests conducted on BASF’s Enershield air/water-resistive barriers are also included, as well as summary discussions of the meaning of the results.
ASTM E2357 Air Leakage of Air Barrier Assemblies is a key test designed to
determine whether air barrier products, when used with other typical wall
components, collectively function as an air barrier assembly. The Acceptance
Criteria covered in the document are ICC-ES AC148 Acceptance Criteria for
Flexible Flashing Materials and ICC-ES AC212 Acceptance Criteria for
Water-Resistive Coatings used as Water-Resistive Barriers over Exterior
Sheathing. Both were completed according to test methods established by the
International Code Council for demonstrating the effectiveness of
water-resistive barrier and flexible flashing materials. The bulletin
recommends that specifiers require the results of these rigorous tests along
with testing required by the Air Barrier Association of America to qualify
acceptable materials for their specifications.
“We developed a complete set of performance data to help designers create
continuous, monolithic air barriers for all wall assemblies and penetrations,”
said Richard Martens, market manager for the Enershield product line for BASF Wall
Systems. “Eliminating unnecessary material transitions simplifies project
execution and facilitates high quality air/water-resistive barrier
installation. The ICC-ES Acceptance Criteria results provide designers with
recognized, third-party confirmation of compliance with building code
The bulletin and other technical literature are available as downloads at www.enershield.basf.com.
Evaluating Air/Water-Resistive Barrier Assemblies Bulletin from BASF
October 27, 2010