Alcoa’s Kawneer Business Introduces AA®3350 ISOPORT® Window Designed to Enhance Energy Efficiency

June 30, 2009

Versatile Window for Commercial and Institutional Applications
Increases Thermal Performance, Safety and Security

NORCROSS, Ga.–Alcoa (NYSE:AA) announced today that its Kawneer business, the leading
manufacturer of architectural aluminum building products and systems for
commercial construction, introduced its new AA®3350 ISOPORT®
Window, designed to enhance the views and energy efficiency of
commercial and institutional applications. Available in single-hung,
double-hung or fixed with an innovative polyamide thermal break design
and factory glazing, the AA®3350 ISOPORT® Window
is highly versatile, leading the way in thermal performance at a
competitive price.

Kawneer’s AA®3350 ISOPORT® Window combines
distinctive features, superior aesthetics and simplified fabrication and
installation to provide architects and glaziers with a product that
meets their needs. The unique shape of the polyamide thermal break
enhances the performance of the window by maintaining the continuity of
the thermal break throughout the window frame and sash. Adding to the
energy efficiency of the window is 1-inch insulating or laminated glass,
which provides high thermal performance and enhances STC and OITC (sound
resistance) performance. AA®3350 ISOPORT® Window
features powder coated die-cast sweep locks and keepers for maximum
security and a push-button feature on sweep locks prevents windows from
being opened accidentally. In addition, an integrated locking system
automatically secures the operable sash when closed, preventing upper
sash drift on double-hung windows.

The AA®3350 ISOPORT® Window has been tested to
meet North American performance standards, including thermal
transmittance, condensation resistance, condensation temperature index
and sound transmission, and multiple sill heights are available to meet
both 10 pound (CW) and 15 pound (AW) psf water performance requirements.

Factory Assembled and Glazed

For enhanced quality control and reduced customer labor costs at the job
site, AA®3350 ISOPORT® Window is factory assembled
and glazed. Factory silicone glazing improves window quality and
performance while eliminating the time investment and costs of field
glazing. Removable stops ensure easy re-glazing with no disassembly
required. Multiple installation options, designed to accommodate a
variety of installation methods, include a frame flange/nailing fin,
strap anchors and receptor system.

Superior Aesthetics

To provide superior aesthetics to any project, the AA®3350
ISOPORT® Window’s integrated extruded lift rails eliminate
the need for surface-applied hardware, making sight lines sleek and
appealing. Muntin grids enclosed in 1-inch insulating glass provide a
traditional design option that is virtually maintenance-free. The
3-1/2-inch frame depth results in a narrower interior to exterior
transition and the window also provides the minimum overall window depth
to achieve structural performance and accommodate 1-inch infills.

Finish options for AA®3350 ISOPORT® Window include
anodized, fluorpolymer and solvent-free powder coat painted in a variety
of colors. A dual color finish option is also available providing the
flexibility to vary interior and exterior finishes and reduce overall
system cost.

To learn more about the AA®3350 ISOPORT® Window,
or for more information on Kawneer, please visit

About Alcoa

Alcoa is the world leader in the production and management of primary
aluminum, fabricated aluminum and alumina combined, through its active
and growing participation in all major aspects of the industry. Alcoa
serves the aerospace, automotive, packaging, building and construction,
commercial transportation and industrial markets, bringing design,
engineering, production and other capabilities of Alcoa’s businesses to
customers. In addition to aluminum products and components including
flat-rolled products, hard alloy extrusions, and forgings, Alcoa also
markets Alcoa® wheels, fastening systems, precision and investment
castings, and building systems. The Company has been named one of the
top most sustainable corporations in the world at the World Economic
Forum in Davos, Switzerland and has been a member of the Dow Jones
Sustainability Index for seven consecutive years. More information can
be found at