Annual Meeting Continues in Florida
Insulating Glass Manufacturers Alliance (IGMA) 8th annual conference
at the Sundial Beach Resort in Sanibel, Fla., continued yesterday
afternoon with a full schedules.
The June meeting had seen a motion to revise the visual quality
guidelines document to reflect the differences between residential
and commercial products. (CLICK
HERE to read more about that meeting.) A "what if" draft document
had since been produced to examine points where separate commercial
product requirements would make sense.
Bob Spindler of Cardinal IG pointed out that window manufacturers
present at the meeting manufacture both residential and for high
to mid-rise buildings. Tracy Rogers of Edgetech IG, chairperson
of IGMA's Visual Quality Working Group, took an "unscientific" survey
of who in the room manufactured 100 percent residential products,
100 percent nonresidential and those who produced a blend of both;
hands were scarce on the first two options. The idea, presumably,
was that when manufacturers produced a blend of both, the document
should reflect the same.
"Having two documents gives a wrong impression of what the glass
manufacturer can and cannot produce," Spindler said. "From an architect's
standpoint, why in the heck would you have two documents; does that
mean you can do something better for one application than another?"
With consensus aiming toward having one document, Rogers suggested
that the next step would be a review of the differences between
commercial and residential lie in the document. After discussion
of a few examples-such as the importance of an "installed" qualification
for nonresidential products-the group agreed to send the revised
draft document around for a second review.
Per the June meeting of the Glazing Guidelines Working Group, IGMA
technical consultant Bill Lingnell and group chair Ken Shelbourn
of Truseal Technologies had combined their research on capillary
tubes and prepared a draft guideline for the group's review (CLICK
HERE to read the June meeting discussion on closing capillary
tubes). Shelbourn explained the verdict on sealing tubes, that resulted
from their research: "If you're going to seal a tube in the field,
you crimp or snip it with wire cutters … but then put a little dab
of sealant on the end of that which will give you a 100 percent
With that question answered, the group turned to examine the SIGMA
document, "SIGMA Guidelines for Use of Capillary/Breather Tubes"
with the goal of adapting it for future use. The group examined
several points closely, including whether they should add a note
cautioning individuals not to use capillary tubes in gas-filled
Spindler noted that it does happen that people use tubes in gas-filled
units. "The intent is that the claim can not be made that the unit
has a specific performance," he said.
"We're not a group that gives permission or not," said Chris Barry
of Pilkington, "it physically can be done." Should not use
capillary tubes with gas-filled units was the prevailing recommendation.
Once the capillary tubes are in, Greg Carney of the Glass Association
of North America (GANA) said that it's not unlikely that glaziers
will try to take them out.
"I have seen situations where they are in the way and they cut
capillary tubes, altering them dramatically," Carney said.
Section 6.0 on glazing thus gained a recommendation that capillary
tubes not be shortened or removed during glazing.
The Gas Permeability Working Group noted that Phase 1 of its research
project has been completed.
"We have now the executive summary, it's been circulated, but you
haven't seen the completed document," said Bruce Virnelson of PRC
DeSoto International, group chair. "That now will be the final document
for that test protocol."
group then turned to its request for proposal seeking a lab to develop
a test protocol for argon permeability through insulating glass
units. To date, the group has received proposals from two different
test labs, while a third lab is interested and has requested an
Speakers from TNO and CAN-BEST were at the meeting to offer presentations
about how they would conduct the tests, as well as the approximate
costs of each step.
Following the big numbers, a member of the audience asked whether
there was someplace else from which some of this test data could
be pulled rather than seeking funding for the testing.
"This will be the first time it's broken down into a small component,"
Virnelson responded. "We're pioneers."
The group is now aiming to get additional proposals in for consideration
prior to the next meeting, and to have time to "really digest these
proposals" made in Florida. Its goal is make a decision in time
for the June meeting.
The Thermal Stress Working Group is aiming to pioneer research
into thermal stress breakage, but is still short a few case studies.
The group has had no responses to its survey, IGMA executive director
Margaret Webb reported.
"I think some people got a little conservative," said Carney. "If
you start having problems, you don't necessarily want to report
them to others." However, the group noted that case studies could
be reported anonymously.
"If you want to be a member of this committee you need to provide
at least three examples," Chris Barry of Pilkington suggested.
While the group agreed to do just that, additional studies would
provide further insight. CLICK
HERE to share your thermal stress breakage case studies or recommendations.
HERE to read about Monday's Certification and Education Committee
The meeting continues through January 31, 2008. Stay tuned to USGNN.com™
for daily updates.
The next IGMA meeting will be held June 16-19, 2008, at the Westin
Resort and Spa in Whistler, British Columbia.
Need more info and analysis about the issues?
HERE to subscribe to USGlass magazine.