MINNEAPOLIS, MN (day, December xx, 2016) – Apogee Enterprises, Inc. (Nasdaq:APOG) announced
today that it has acquired the assets of privately-held Sotawall Inc., a leading designer and fabricator of
high-performance, unitized curtainwall systems for commercial construction projects in North America,
for approximately $135 million. It will operate as Sotawall Limited within Apogee, which provides
distinctive value-added glass solutions for the architectural and picture framing industries.

“We are very pleased to acquire Sotawall, Inc., a premier curtainwall supplier with unique products and a
company that we know well since many of its projects have incorporated our architectural glass,” said
Joseph F. Puishys, Apogee chief executive officer. “With the acquisition of this 25-year-old business,
which generates annual revenues of approximately $100 million from supplying curtainwall for
construction projects in Canada and the United States, we are driving our growth strategies by both
increasing our geographic presence and adding to our product offerings.

“Sotawall’s focus on delivering curtainwall solutions that result in smooth, streamlined, on-budget
projects yields attractive operating margins,” said Puishys. “Its EBITDA margins will be accretive to
Apogee and our architectural framing systems segment, and it will be accretive to Apogee’s earnings in
fiscal 2018.”

“We are pleased to be joining forces with Apogee, a strong company that is also known for its leadership
and integrity in commercial construction markets,” said Juan Speck, president, owner and founder of
Toronto-based Sotawall, Inc., who will continue to lead the business. “We look forward to working with
Apogee to capitalize on opportunities to grow Sotawall Limited.”

“Sotawall Limited will contribute to Apogee’s continued revenue and margin growth in commercial
construction markets that are anticipated to grow through our fiscal 2020, based on our internal visibility
and external metrics,” said Puishys. “We’re especially pleased that Juan and his leadership team, who
have cultivated a culture of innovation and quality consistent with the strength of Apogee’s other brands,
will continue to lead Sotawall Limited.”

Apogee funded the acquisition from cash and its credit facility. Sotawall Limited will be an eighth
independent operating unit in the Apogee portfolio and reported as part of the architectural framing
systems segment.

Apogee management will discuss the acquisition during its third-quarter earnings conference call
tomorrow morning, Thursday, Dec. 15 at 9 a.m. central time. To participate in the earnings
teleconference, call (866) 525-3151 toll free or (330) 863-3393 international, access code 27081806.
To listen to the live conference call over the internet, go to the Apogee web site at
http://www.apog.com and click on investors, then overview and then the webcast link on that page.

Sotawall, established in 1989, is headquartered in Brampton, ON, in the Greater Toronto area. It has
approximately 560 employees involved in engineering, fabrication and assembly of their curtainwall
systems. It partners with leading glazing subcontractors for installation of its systems.

Apogee Enterprises, Inc., headquartered in Minneapolis, is a leader in technologies involving the
design and development of value-added glass products and services. The company is organized in four
segments, with three of the segments serving the commercial construction market:
– Architectural Glass segment consists of Viracon, the leading fabricator of coated,
highperformance architectural glass for global markets.
– Architectural Framing Systems segment businesses design, engineer, fabricate and finish the
aluminum frames for window, curtainwall and storefront systems that comprise the outside skin of
buildings. Businesses in this segment are: Wausau Window and Wall Systems, a manufacturer of
custom aluminum window systems and curtainwall; Tubelite, a fabricator of aluminum storefront,
entrance and curtainwall products; Alumicor, a fabricator of aluminum storefront, entrance,
curtainwall and window products for Canadian markets; and Linetec, a paint and anodizing finisher
of window frames and PVC shutters.
– Architectural Services segment consists of Harmon, Inc., one of the largest U.S. full-service
building glass installation companies.
– Large-Scale Optical segment consists of Tru Vue, a value-added glass and acrylic manufacturer
primarily for the custom picture framing market.

The discussion above contains “forward-looking statements” within the meaning of the Private
Securities Litigation Reform Act of 1995. These statements reflect Apogee management’s expectations
or beliefs as of the date of this release. The company undertakes no obligation to publicly update or
revise any forward-looking statements, whether as a result of new information, future events or
otherwise. All forward-looking statements are qualified by factors that may affect the operating results
of the company, including the following: (A) global economic conditions and the cyclical nature of the
North American and Latin American commercial construction industries, which impact our three
architectural segments, and consumer confidence and the conditions of the U.S. economy, which
impact our large-scale optical segment; (B) fluctuations in foreign currency exchange rates; (C) actions
of new and existing competitors; (D) ability to effectively utilize and increase production capacity;
(E) product performance, reliability and quality issues; (F) project management and installation issues
that could result in losses on individual contracts; (G) changes in consumer and customer preference,
or architectural trends and building codes; (H) dependence on a relatively small number of customers
in certain business segments; (I) revenue and operating results that could differ from market
expectations; (J) self-insurance risk related to a material product liability or other event for which the
company is liable; (K) dependence on information technology systems and information security
threats; (L) cost of compliance with and changes in environmental regulations; (M) interruptions in

glass supply; (N) loss of key personnel and inability to source sufficient labor; and (O) integration of
recent acquisition. The company cautions investors that actual future results could differ materially
from those described in the forward-looking statements, and that other factors may in the future prove
to be important in affecting the company’s results of operations. New factors emerge from time to time
and it is not possible for management to predict all such factors, nor can it assess the impact of each
such factor on the business or the extent to which any factor, or a combination of factors, may cause
actual results to differ materially from those contained in any forward-looking statements. For a more
detailed explanation of the foregoing and other risks and uncertainties, see Item 1A of the company’s
Annual Report on Form 10-K for the fiscal year ended February 27, 2016.


Contact: Mary Ann Jackson
Investor Relations