Nov, 2018
UL opens new building envelope test facility for construction industry in Toronto

UL CLEB expands building envelope services to Toronto.

Toronto, Nov 6, 2018 – UL is expanding its services for the building envelope and building sciences market with today’s opening of its newest facility in Toronto. UL now offers additional building science and building envelope testing services to the Canadian market.

UL CLEB, a UL company, is a leading Canadian building science and building envelope service provider, delivering building envelope testing services, building forensic services, field testing and building envelope commissioning services for architects, building owners, manufacturers and installers in the building construction markets across North America. UL acquired Montreal based CLEB in May 2017.

The Toronto facility can accommodate all forms of building envelope assemblies. The facility contains both a fenestration lab and a mock-up lab that can test full scale window wall, curtain wall and wall assemblies. The mock-up lab is located indoors in a 7200 square foot facility equipped with a 50 ton overhead crane and can test to a maximum sample size of 40 feet high. The mock-up lab is among the largest indoor facilities in Canada. The fenestration lab is equipped to test any sample size. Both labs are conveniently located at UL’s laboratory in Canada on Underwriters Rd. in Toronto.

“The expansion of our building envelope services in Toronto provides the construction industry throughout Ontario with access to an organization that is known worldwide for advancing building science. We are excited to offer our services to one of the most active construction markets in the world,” said Joe Hosey, general manager for Canada at UL.
For over 30 years, we have contributed to many high-caliber projects throughout Eastern Canada, the northeastern United States and beyond North America.
In addition to the new Toronto lab, UL has building science test facilities in Montreal and Chicago.

“We are excited by this opportunity to provide best-in-class services to the building envelope community throughout Ontario,” said Mario Gonçalves, global business leader, UL. “The construction industry will have access to a broader range of UL complementary services and can rely on our technical expertise backed by our unmatched customer service, all delivered locally in Toronto.”

UL’s building science laboratory facilities are among the largest in Canada, and are all accredited by the major North American accreditation organizations.

UL fosters safe living and working conditions for people everywhere through the application of science to solve safety, security and sustainability challenges. The UL Mark engenders trust enabling the safe adoption of innovative new products and technologies. Everyone at UL shares a passion to make the world a safer place. We test, inspect, audit, certify, validate, verify, advise and train and we support these efforts with software solutions for safety and sustainability. To learn more about us, visit To learn more about UL CLEB, visit For inquiries about UL CLEB please call 1-855-353-2532.

May, 2017
UL and CLEB Combine to Provide Best in Class Building Science Services to the Building Construction Community

Increases UL’s global footprint in the Construction Market and expands UL’s Building Science Services expertise

UL, a global safety science leader and a well-known leader worldwide in the Building, Fire, Life Safety and Security market, is expanding its service offerings further into the Building Envelope and Building Sciences market. Today, UL announces the acquisition of CLEB, the leading Canadian Building Science and Building Envelope service provider. CLEB, a Montreal-based company, is a privately owned business. CLEB provides a wide range of building science services, including building envelope testing services, building forensic services, and field testing and building system commissioning services for architects, building owners, manufacturers and others in the building construction markets across North America. The acquisition strengthens UL’s expertise in the field of building science services and building envelope testing, and certification services, and offers manufacturing clients greater access to global markets.

CLEB’s unique laboratory facilities are among the largest in Canada and are accredited by the major North American accreditation organizations. Over the last thirty years, CLEB has contributed to many high-caliber projects throughout Eastern Canada and the Northeastern United States, as well as projects beyond North America.

“UL and CLEB have a shared mission and complementary businesses. We are relied upon by building construction communities for the services and knowledge that they need to enhance public safety, meet regulatory demands, protect brand value and successfully access global markets,” said Vice President and General Manager of UL Building and Life Safety Technologies Division Chris Hasbrook. “Working as one, UL and CLEB will continue to grow the vision that has brought us together, and grow our position as the global leader in the field of building science.’’

CLEB’s employees will join and strengthen UL’s industry professionals and recently inaugurated building envelope testing facility located in Northbrook, IL. Effective immediately, the company will operate as CLEB, a UL Company. The group’s Building Science thought leadership and global Centers of Excellence will be based out of the Montreal and Northbrook headquarters.

“We are excited by this opportunity to join forces with UL and provide best-in-class services to the building envelope community,” said Mario Gonçalves, former president of CLEB and new principal and global business leader – Building Science Technologies for CLEB. “Our group’s shared reputation for delivering industry-leading services and in-depth industry knowledge will continue to strengthen our position as leaders in the field of building science services and building envelope  testing and certification. Combining with UL will allow us to significantly accelerate our growth and access to global markets, in addition to providing our clients with a broader range of complementary services and expertise. Clients can rest assured that customer service and technical quality will remain our top priorities and that our newly integrated capabilities will deliver even more value.’’

The transaction closed on May 5, 2017. Terms of the acquisition were not disclosed.


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Feb, 2017
Web-based Curtain-Wall Guide

Guide du mur-rideau

February 21 2017

CLEB, in collaboration with regional organizations dedicated to the dissemination of good building envelope practices, provides architects, manufacturers, as well as, installers a web-based Curtain-Wall Guide.

Currently available in French, the Guide covers all aspects regarding curtain-walls: materials and components, assemblies, quality control and durability, standards and tests.

Nov, 2014
Oct, 2014
new head office inauguration

Inauguration nouveau siège social / New head office inauguration from CLEB on Vimeo.

Commemorative video for new head office inauguration in Varennes

Oct, 2014
Minimal revamps the identity of C.L.E.B.

Minimal Agency was the brain behind the new visual identity of CLEB. The agency developed the new website, different tools of communication and marketing, in addition to having designed the logo.



tb-minimal3 tb-minimal2











Oct, 2014
CLEB featured in the October issue of Business Elite Canada

Sister companies Air-Ins Inc. and Patenaude Trempe Van Dalen Inc. (PTVD) are not new names in the field of building science, but their decision to rebrand this year under the group name CLEB is one way the company continues its commitment to innovation.

Read more : CLEB Business Elite Canada Oct. 2014

See our LinkedIn page

Jul, 2014
CLEB takes flight!

Patenaude Trempe Van Dalen and Air-Ins, two sister companies working in the building-envelope field, will be united from now on under a single brand image called CLEB.

Patenaude Trempe Van Dalen and Air-Ins, the most important group of professionals in the East of Canada on the question of laboratory and on-site testing, quality control and technical investigations dedicated exclusively to the building-science field, will be known under the name of CLEB (Conseil et laboratoire en envelope du bâtiment) from now on. This new brand image highlights the strategic repositioning of sister companies Patenaude Trempe Van Dalen and Air-Ins in order to create new group synergy. And to mark the occasion, CLEB will officially unveil, on July 3rd, its new head office in Varennes and the expansion of its testing laboratory, which have necessitated investment over three million dollars.

“For over 30 years, companies Air-Ins and PTVD grew individually while offering complementary services in their field of application”, underlines Mario Gonçalves, president of CLEB. “Rooted in the values imparted by their respective founders, these two companies grew to become mature companies recognized as leaders in North America. Our staff’s expertise and our laboratory installations, among the most important in Canada, allow us to offer a single window for large-scale projects throughout the East of Canada and the North-East of the United States, always with the objective of better serving our clients.”

The head office was designed by Éric Labbé, architect, and built by PRIO inc. The new brand image, for its part, was developed by the staff of Minimal Mtl.

Jul, 2013
Construction of our new head office and laboratory expansion begins

Last year, a building expansion committee composed of the company’s senior personnel was created to take into account the group’s needs in light of the upcoming new head-office construction.

This exercise helped create a dynamic facility where our personnel and our guests can feel at home in an environment conducive to group work and interaction. In particular, the new premises are composed of an enclosed courtyard, several meeting rooms with glass enclosures, a large cafeteria with an adjacent rest area, and open-concept offices that are flooded with natural light.