Urges GANA to Retract Informational Bulletins
A letter sent to the Glass Association of North America (GANA)
from the International Window Cleaning Association's (IWCA) Tempered
Glass Quality Committee is urging GANA to retract two glass informational
bulletin--Proper Procedures for Cleaning Architectural
Glass Products and Heat-Treated Glass Surfaces are Different--claiming
the documents represent inaccurate or misleading information. According
to the letter, the IWCA's concerns come after learning that GANA
had formed a task group to develop a statement that would address
its position on the issue of using metal scrapers to clean glass.
For the past several years, communications have been ongoing between
GANA and the IWCA about the subject of metal scrapers to clean glass.
According to the letter from the IWCA, "the presence of fabricating
debris on tempered and heat-strengthened glass is an easily preventable
surface defect [that] presents a serious maintenance problem to
the owner of the glass for the life of the glass."
During past meetings and discussions, GANA has explained that these
particles cannot be eliminated completely, as they are an inherent
part of the tempering process. GANA says it has also promoted the
fact that there are procedures that can make the glass better, and
they have worked to bring this information to the tempering industry.
In this most recent correspondence, however, the IWCA claims, "when
a metal scraper is used to remove construction debris from poor
quality, heat-treated glass, the scraper dislodges defects and drags
them along the glass, resulting in excess scratching to the glass
surface." The letter goes on to say, "This issue is a direct result
of some glass fabricators not maintaining their facilities in a
responsible manner, which would prevent the presence of excess fabricating
Jeff Hardin from Transparent Window Cleaning, who also serves on
the IWCA board of directors, spoke to USGNN.com regarding his association's
souces for the information about tempered glass that was provided
in the letter. Hardin says his souces are ancedotal -- through years
of experience, including from members who have toured and visited
different glass plants.
"It's hard to give just one source," Hardin says.
GANA is not commenting on the IWCA's letter at this time.
Need more info and analysis about the issues?
HERE to subscribe to USGlass magazine.