Solarban R100/Solargray Glass Delivers Significant Energy Savings in New
building a college football stadium, it is hard to find a better value than
high-performance glass that pays for itself; yet that is precisely what
architect Andrew Kulp, AIA, was able to discover when he specified Solarban®
R100/Solargray® glass by PPG for Mustang Stadium at Stevenson University in
Owings Mills, Md.
Designed by Curry Architects of Townson, Md. and constructed by David S.
Brown Enterprises, Ltd. of Baltimore, Md., the $7 million, multi-purpose
stadium features a turf field for football, lacrosse and soccer, as well as
locker rooms, offices, executive suites, press boxes and a 4,500 square-foot
indoor fitness center.
The signature exterior design element is a contemporary brick, metal and
glass façade, fabricated with approximately 2,700 square feet of Solarban
R100/ Solargray glass, that provides dazzling hilltop views of the local
community while significantly reducing the stadium’s energy use.
the lead architect for the project, selected Solarban R100/Solargray and
standard Solargray glasses for two reasons. First, because the glass helped
solve a number of design challenges and, second, because energy modeling
demonstrated that it would immediately pay for itself.
According to Kulp, one major hurdle with the stadium design was the desire
to bathe the interior of the building in light while mitigating the solar
heat gain associated with a long, glass-walled façade on the west side of
the stadium. “We knew from the beginning that having a large glass wall
facing to the west was going to create an energy nightmare,” he said.
In addition, because the east façade would overlook the playing fields, the
reflectivity of the glass had to be minimized so glare would not disrupt
play, particularly on sunny afternoons.
After meeting with numerous glass manufacturers and taking calls from nearly
“every glass contractor in the state,” Kulp eventually found a solution with
Solarban R100/Solargray glass, a neutral-reflective, solar control, low-e
glass with a very light, cool-gray exterior appearance, which he specified
for the west façade. Conventional Solargray glass was chosen for the east-,
north- and southfacing facades.
with clear glass in a 1-inch insulating glass unit (IGU), Solarban R100/Solargray
glass has a light to solar gain (LSG) ratio of 1.23 — based on visible light
transmittance (VLT) of 21 percent and a solar heat gain coefficient (SHGC)
of 0.17 — and exterior reflectance of 12 percent. When joined with clear
glass in a 1-inch IGU, the exterior reflectance of Solargray glass is
lowered to just 7 percent.
Working with a glazing contractor and mechanical engineer, Kulp determined
that specifying Solarban R100/ Solargray glass for the project was an
investment that would pay for itself almost immediately through lower HVAC
“When we plugged [Solarban R100/Solargray PPG glass] into the building
model, we found that it cut our cooling requirements from 109 tons of HVAC
to about 99 tons. By getting below 100 tons, we were able to realize about
$35,000 in equipment savings that was nearly enough to cover the $36,000
premium we paid for the glass. That enabled us to stay on budget while
delivering significant energy efficiencies from Day One.”
Kulp said that, in addition to energy savings and attractive aesthetics, the
Solarban R100 and Solargray glasses contribute to the comfort and livability
of the stadium’s interior offices, walkways and fitness facility, which are
lighted during the day by a large bank of west-facing windows. “Even when it
is hot and sunny, I can put my hand on the glass and it doesn’t feel warm,”
With campuses in Stevenson and Owings Mills, Md., Stevenson University is a
rapidly-growing institution that is expanding its athletics program as part
of an aggressive effort to attract new students and build a vibrant campus
culture. University president Kevin J. Manning, Ph.D., said the new
3,500-seat stadium, built on the former site of the Baltimore Ravens’ Owings
Mill practice facility, is integral to that strategy.
“One of our goals is to be a national leader in Division III athletics,” he
said of the school, which already has a history of excellence in its men’s
and women’s programs for soccer and lacrosse. “In order to do that kind of
thing, you have to have a really first-rate athletic complex. We wanted a
facility, a venue that was going to be equal to the quality of those teams.”
With the help of Solarban R100 glass, Mustang Stadium at Stevenson
University not only accomplishes that objective, but does so in a way that
makes the university’s future both brighter and more sustainable.
For more information about Solarban R100 glass, Solargray glass and PPG’s
entire collection of Cradle to Cradle Certified CM glasses, visit
www.ppgideascapes.com or call 1-888-PPG-IDEA (774-4332).
Owner: Stevenson University
Architect: Curry Architects, Towson, MD
General Contractor: David S. Brown Enterprises, Baltimore, MD
PPG IdeaScapes Products: Solarban® R100/Solargray® Glass,
Glazing Contractor: DJ’s Glass and Mirror, Inc., Thurmont, MD