Top 50 Glaziers: 2017 Annual Report - The List

By Katy Devlin and Norah Dick; Contributions from Bethany Stough
June 6, 2017


The construction of Pittsburgh’s Bakery Square 2.0 office building marks the completion of the major Bakery Square mixed-use development project that began in 2007 with the refurbishment of an old Nabisco Bakery building. For the 2.0 office building, Specified Systems Inc.,, engineered, fabricated and erected the glass and glazing systems, including over 35,000 square feet of Tubelite,, storefront and curtain wall. To achieve thermal and energy performance goals set by Strada Architects LLC,, Specified Systems and Tubelite collaborated to deliver a custom high-performance framing system. According to Specified Systems, the team developed a large insulation cavity for the system—a custom engineered extruding casing that was set in the openings first, followed by the framing, creating a 10 ½-inch deep system. The glass for the storefront and curtain wall is Energy Select 28 solar control low-emissivity glass from AGC Glass Co., The project also features a glass-enclosed, exterior-glazed pedestrian bridge that spans a four-lane main artery and connects floors four through six of each building. The bridge is clad in Tubelite 400 Series curtain wall, with high-performance insulating glass consisting of Vitro Architectural Glass,, Solarban 70 on Starphire over Starphire ultra clear low-iron glass. W.A. Wilson Inc.,, supplied the glass. P.J. Dick Inc.,, was the general contractor. Photo courtesy of Specified Systems Inc.

The annual Top 50 rankings present what Glass Magazine editors believe to be the United States’ 50 largest contract glazing firms, based on sales volumes. The glazing firms are ranked within nine sales categories.

Information from 49 of the Top 50 comes directly from contract glazing firms or from financial reports from publicly traded parent companies. In cases where a company declines to provide information, we use independent sources to determine its ranking.

If your company belongs on the list, or you would like to update its information, please contact us. It is only with the cooperation of individual companies that Glass Magazine’s Top 50 Glaziers rankings can be as accurate as possible. Questions or comments about this year’s rankings, and requests to be included next year, can be sent to Katy Devlin at

The List
The Market
Supplier Solutions


01 Permasteelisa North America

Windsor, CT

Previous rank: 1
Sales: Up 12.5%
U.S. locations: Seven

Sales for fiscal year 2016 (April 1, 2015-March 31, 2016), from parent Lixil Group Corp.’s FYE2016 Financial Results Summary.


$400 TO $500 MILLION

02 Enclos Corp.

Eagan, MN

Previous rank: 2
Sales: Up from 2015
U.S. locations: 15
Full-time employees: 788
Total employees: 793

$200 TO $300 MILLION

03 Harmon Inc.

Bloomington, MN

Previous rank: 3
Sales: Up 10.2%
U.S. locations: 11
Full-time employees: 532
Total employees: 536

04 Benson Industries Inc.

Portland, OR

Previous rank: 4
Sales: Up 4%
U.S. locations: 10
Full-time employees: 725
Total employees: 725

05 Walters & Wolf*

Fremont, CA

Previous rank: 5
U.S. locations: Seven
Full-time employees: 700
Total employees: 700 *rank based on sales estimate

$100 TO $200 MILLION

06 W&W Glass LLC

Nanuet, NY

Previous rank: 6
Sales: Up 33.3%
U.S. locations: One
Full-time employees: 225
Total employees: 225

07 GMP Consulting & Glazing Contractors Inc.

Miami, FL

Previous rank: N/A
Sales: Up 102.9%
U.S. locations: Two
Full-time employees: 85
Total employees: 85

08 Architectural Glass & Aluminum

Livermore, CA

Previous rank: 7
Sales: Up 20.4%
U.S. locations: Three
Full-time employees: 68
Total employees: 286

09 Binswanger Glass

Memphis, TN

Previous rank: 8
Sales: Up 31.7%
U.S. locations: 66
Full-time employees: 945
Total employees: 969

$50 TO $100 MILLION

10 Karas & Karas Glass Co.

Boston, MA

Previous rank: 11
Sales: Up 41.6%
U.S. locations: Two
Full-time employees: 85
Total employees: 143

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