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 12, 2010