Sto Corp. announced that its StoGuard fluid-applied air and moisture barrier showed significant air tightness during a recent blower door test on a project at Joint Base Lewis-McChord in Washington state.
In October 2009, the United States Army Corps of Engineers created requirements
for building air tightness and building air leakage testing for new and
renovation Army construction projects in or after Fiscal Year 2010. The
testing, in accordance with ASTM E 2178, must demonstrate that the air leakage
rate of the building envelope does not exceed 0.25 cfm/sq ft.
The project, which used the StoGuard system, passed with high marks. Where an
acceptable score for the assembly would be 0.25 cfm/square feet, the assembly
scored 0.18 cfm/square feet in initial testing, and 0.11 in final testing-a
difference of 56 percent less air leakage.
The building tested, the Special Operations Forces Aviation Battalion Education
Center, is part of the larger Joint Base Lewis-McChord Whole Barracks Renewal
project. The barrier system, along with StoGuard Fabric, StoGuard Tape, and
StoGuard Primer, was applied to this building and tested in late
At Joint Base Lewis-McChord, StoGuard “performed at a level that has not been
accomplished since the USACE requirement for such testing began,” said Benham
Hansen, the ACI-certified-project superintendent. “It is very uncommon after
the initial test to accomplish more than a 0.02 or 0.03 difference for the
final test. We were able to achieve a 0.07 decrease in
Neudorfer Engineers Inc., which conducted the testing at Joint Base
Lewis-McChord, confirmed to Hansen in correspondence that the Education Center
is “the highest-performing building they have ever been associated
“This was one of the first projects I’ve seen the StoGuard application go on,
and it was one of the better tests I’ve seen,” said Phil Emory, senior project
manager at Neudorfer. “0.11 cfm is extremely low and the results were because
of the StoGuard product and application. This is a sensational building with an
A full copy of the test results can be found on the
Sto Corp. Web site.
StoGuard Scores High On Air Barrier Testing
September 28, 2010