Experts Weigh in on Air Leakage
Considerations for Contract Glaziers
Failure of the building envelope is a challenge for many, including contract
glaziers. Air leakage is among those concerns.
Marcy Tyler, technical applications manager for Tremco, says North American
building envelope repair is a multi-billion dollar industry and most problems
are moisture-related, caused by air or moisture leakage.
“Most façade problems relate to terminations and connection details
and 70 percent of all construction litigation is related to façade
leakage,” she says. She explains that most air leakage failures occur
through walls with windows. It is not about the wall, she says, but about
how dissimilar components come together.
Craig Carson, vice president of A-1 Glass Inc. in Englewood, Colo., says
that in learning more about how walls with openings actually perform,
“It is obvious that there was energy loss at the window (or storefront,
or curtainwall) perimeter conditions that needed to be addressed.
“Thinking of ourselves as building envelope contractors and not just glazing
contractors forces us to be involved with the total design of the wall.”
He points out that lack of a secure air barrier can ultimately be a concern
“Our experience with these new concepts demands that we install the glazing
frames before the finish exterior wall product is installed … We are seeing
general acceptance of this change to the former means and methods of building
walls,” he says. “Our biggest resistance had come from the masonry contractors,
but as the architects and general contractors began to realize that this
was the only practical way to properly seal the window systems, by having
full access to the perimeter conditions, the masons have been forced to
revaluate their position and accept that their installation must follow
Determining which party—the contract glazier or the water-proofer—ultimately
is responsible for the air barrier is sometimes a challenge.
Carson says that A-1 simply accepts the responsibility for what it installs.
“However, we also make sure that testing of all materials is done in the
manufacturers’ labs and [we] double check [that] in the field,” he says.
Survey Says Contractors to Hire More than Fire in 2011;
Contract Glaziers Remain Unsure
According to the 2011 Construction Hiring and Business Outlook survey
conducted by the Associated General Contractors of America and Navignant,
this year for the first time in years many firms say they are planning
to add more new staff than layoff current employees. But there is quite
a bit of uncertainty regarding the labor market, as 53 percent reported
they don’t know or don’t plan to change their staff size.
Jonathan Schuyler, preconstruction executive and partner with Giroux Glass
Inc. in Las Vegas says they are starting to see a bit of light.
“Over the course of the past year our work force has been reduced by 50
percent in the office and upwards of 75 percent in the field,” Schuyler
says. “In the past few months we have noticed an upward trend with respect
to building as a whole, but nothing that would lead us to believe we will
see an increase in office staff over the course of the next year … In
terms of overall growth, I do believe we will see an increase in the field
of 5 to 10 percent based upon what we are seeing in preconstruction.”
Jennifer Russell Vanasse is the vice president of the Window Shop Inc.
in Plainville, Conn., a small, non-union operation. She feels that 2011
is going to be another tough year for the glazing trade. Vanasse is starting
to see a small increase in new project bidding, as well as some older
projects out for re-bids.
“I also seem to be getting an increase in requests for bids from companies
that I do not normally do work for. Whether that is because companies
are closing or general contractors are price checking, I am not sure,”
she says. “We are trying to be competitive in a market where prices are
really tight. However, we know our bottom line, which I feel is the key
to a company’s ultimate survival in a down market, like we are experiencing
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