Phone (508) 238-3587

417 Purchase Street, S. Easton, MA 02375

Mon - Fri 8:30 AM - 5:30 PM



building envelope technologies, Inc.

What sets us apart
from the competition?

Our seasoned team of registered design professionals focuses solely on the building envelope and has a proven track record with over 20 years of service. We have the expertise you need, and the experience you can trust.

our story

our story

BET was formed in 2000 to provide quality architectural engineering services focused on building enclosure systems and technologies. Our team is comprised of seasoned design professionals who specialize in roofs, facades, fenestration, curtain walls, air barriers and waterproofing systems. Located just south of Boston, we service all of New England, including MA, NH, RI, CT, VT, and ME.

Our strengths

Our strengths

We apply a holistic approach to building envelope systems that enables us to provide our clients with sustainable structures using affordable building technology. Building envelope systems and techniques are constantly evolving in search of better performance, less expense, and more elegant appearance. This makes the design and procurement of the building envelope a highly technical and complex process for which the demands of a building envelope specialist’s knowledge are needed.

our commitment

our commitment

Our goal is to make a positive contribution to the quality of the as-built environment by providing the highest level of professional expertise in building envelope engineering as a specialist discipline. We are committed to act in a morally responsible manner in the interests of our clients, employees, and the environment. We strive for continual improvement by investing in developing technologies, equipment, and training.

meet our team






Office Manager



our clients

AnnBeha Architects

Architectural Resources Cambridge, Inc.


Bruner/Cott & Associates, Inc.

C & R Rizvi, Inc.

Centerbrook Architects

Charlie Rose Architects

Conyngham Associates

CUBE Design & Research

Dan Winny Architect

Dermady Architects

DiMella Shaffer Associates, Inc.

Embarc Design

Gund Partnership

Handlin, Garrahan & Associates

Hickox Williams Architects

Imai Keller Moore Architects

Kallmann, McKinnell & Wood Architects

Kling Stubbins

Leers Weinzapfel Associates Architects

Next Phase Studios

Paul Lukez Architecture

Peter Rose Architects

Pfeufer/Richardson P.C. Architects

Prellwitz/Chilinski Associates

R.E. Dinneen Architects & Planners, Inc.

Reed Hilderbrand Associates

Scott Payette Architects

Steffian Bradley Architects

Taylor & Burns Architects

The Narrow Gate Architecture, Ltd.

Turowski2 Architecture, Inc.

William Rawn Architects

Wilson Architects, Inc.

Abbott Laboratories

Albert B. Ashforth, Inc.

Bedford, Town of

Bentley University

Boston College

Boston Properties

Boston Public Library

Brandeis University

Charlesgate W. Realty Trust

Claremont Corporation

Compass Realty

John M. Corcoran Company

Devonshire Associates

Emmanuel College

Fidelity Corporate Real Estate

Fidelity Investments

Fitzinn Parking Systems

Four Seasons Hotel

Groton School

Harvard Medical School

The Haughey Company

Historic Boston, Inc.

Holy Cross Family Ministries

Jamestown Public Schools

Just-A-Start Corporation

Mass. Maritime Academy

Mass. State College Building Authority (MSCBA)

Millipore Corporation

Milton Academy

MIT Investment Mgmt. Co.

Mount Ida College

Museum of Fine Arts Boston

Museum of Science

Newton Wellesley Hospital

Noble & Greenough School

Ozzy Properties

Paradigm Properties, LLC

Peabody Essex Museum

Pembroke Real Estate

Phillips Academy Andover

Providence Housing

The Rosenblum Companies

Samuels & Associates

University of Massachusetts-Amherst

University of Massachusetts-Boston

University of New Hampshire

Urban Edge

Urban Meritage

Aptuxcet Village, Bourne, MA

Captain’s Cove, Quincy, MA

500 Commercial St., Boston, MA

160 West Broadway, S. Boston, MA

170 West Broadway, S. Boston, MA

184-190 Commonwealth Ave., Boston, MA

Constellation Wharf, Boston, MA

Domus One, Cambridge, MA

The Estuary, Hull, MA

29 Fayette St., Boston, MA

Halifax Meadows, Halifax, MA

Highland Meadows, Weston, MA

The Newton Terraces, Newton, MA

Ledgebrook, Newton, MA

Lexington Place, Lexington, MA

Newfield Woods, W. Roxbury, MA

Parkview, Walpole, MA

The Parkway at Chestnut Hill, Chestnut Hill, MA

The Print Shop, Cambridge, MA

Stetson West, Weymouth, MA

The Summerset, Orleans, MA

45 Trowbridge St., Cambridge, MA

The Villages at Brookside, Bourne, MA

The Warwick, Brookline, MA

The Woodlands at Belmont Hill II, Belmont, MA

Willow Brook, Wayland, MA


Adams Builders

Beacon Services

C.P. Berry Construction Co., Inc.

CCI, Inc.

Consigli Construction Co.

Corolla Roofing

Linbeck/Kennedy Rossi

John Moriarty & Associates

Heritage Restoration

NER Construction

Phoenix Bay State

The Richmond Group

Schernecker Property Services

Schernecker Property Servies

Shawmut Design & Construction

Suffolk Construction Corp.

TCR Northeast Properties

TRG Builders

Turner Construction


A.W. Perry Inc.

Barkan Management


C.B. Richard Ellis

Colliers International

Dannin Management Corp.

The Davis Companies

The Dartmouth Group

Greater Boston Properties

Great North

J. A. Wood

Johnson Controls

Jones Lange & LaSalle

Lundgren Management Group

Maloney Properties

Mercantile Property Management

Meredith & Grew

Samuels & Associates

Oakwood Worldwide

Paradigm Properties, LLC

Samuels & Associates

Senne Real Estate

Street & Company, Inc.

Sun Property Group

Trinity Property Management


Boyle, Morrissey & Campo, PC

Dain, Torpy, Le Ray, Wiest & Garner, P.C.

Donovan Hatem, LLP

Gordon & Rees, LLP


Rawson, Merrigan, & Litner, LLP

Marcus, Emmer, Errico & Brooks, PC

Mirrione, Shaughnessy, Uitti, LLC

Morrison Mahoney, LLP

Prince Lobel Tye, LLP

Nicolai Law Group, PC

Robert Nislick, AAL

Robinson & Cole, LLP

Sullivan & Comerford P.C.

Tucker, Heifetz & Saltzman, LLP



Allston Brighton CDB


Black Diamond Real Estate Advisors

The Burns Companies

Joslin, Lesser & Associates

KV Associates

Leftfield, LLC

Pinck & Company

Pomroy Associates

Zaurie Zimmerman Associates



AEW Capital Management

Akelius Real Estate

Core Investments

The Davis Companies

Fidelity Real Estate

HallKeen Management

Lexham Private Investors

MIT Investment Mgmt. Co.

Oakwood Worldwide

Paradigm Properties, LLC

Samuels & Associates



Air Barrier Association of America

BASF Corporation

Briggs Engineering & Testing

CertainTeed Corporation

CNA Surety

Noblin & Associates

Travelers Bond

TAMS Consultants, Inc.

Thielsch Engineering

Vertex Engineering


"...knowledgeable, practical and easy to work with."

"DiMella Shaffer has long history of working with Building Envelope Technologies on renovations and new buildings at Northeastern, Harvard, Tufts and UMass Campuses. BET has supported our architects and designers with detailing tricky conditions, improving our understanding of envelope performance and specifying products. BET shines in their thorough review of shop drawings and excellent field observations. Their staff is knowledgeable, practical and easy to work with. We would recommend them to any owner, developer or architect looking to improve their building exteriors."

"I am very happy to have BET on our team."

"Over the last 10+ years, Lance and his team have proven to be specialists in the proper application of a wide variety of envelope products. They recognize there is never a one-size-fits-all solution, and that each situation may be solved by a variety of different approaches. And because UrbanMeritage specializes in the preservation and development of historically significant buildings in Boston’s Back Bay, I am very happy to have BET on our team."

"Having BET on our project team brings a high level of expertise to the design of our exteriors."

"Having BET on our project team brings a high level of expertise to the design of our exteriors. We have worked with them on several projects and have always found them engaging and willing to improve the performance of our details, while maintaining the design intent. They spend the time understanding what we are trying to accomplish, suggest technologies that we may not have thought of, and follow through with very thorough reviews. Their on-site presence has proven to, not only ensure the design is being followed, but also help solve problems and mitigate any issues that inevitably come up. They are a pleasure to work with!"

"We look forward to working with them again in the future."

BET met with the team weekly to conduct intensive reviews of the progress of work. Their onsite time was invaluable to address and identify existing conditions and to provide quality control review and testing. Their technical expertise in building envelopes and waterproofing was invaluable from design through construction and we look forward to working with them again in the future."

"I cannot imagine pulling off this project without BET."

"BET can provide expertise on the full range of diagnosis, analysis, design, repair, installation and inspection, all backed by unmatched field supervision. They worked closely and extremely well with the contractor and provided testing advice and service. I cannot imagine pulling off this project without BET."

"It is hard to imagine anyone better!"

“If you have a large or complex job that requires excellent envelope engineering and oversight, creative solutions, always timely and easy to understand communications, impressive responsiveness and organization, and a team that is a pleasure to work with and will never let you down, you need David Horton and BET. You would be crazy not to consider them. It is hard to imagine anyone better.”