About us

Building the horizon together

Groupe Lessard is a Quebec-based leader in the design, manufacturing and installation of high-performance building envelope systems for the commercial, multi-residential, institutional and industrial sectors.

Aluminum windows, window walls, conventional curtain walls, unitized curtain walls, operable windows, aluminum doors, storefronts, skylights, sunshades and other accessories.

Groupe Lessard has been innovating in the field of high-performance aluminum and glass architectural systems since it was founded. We offer products that provide greater ease of installation and have established a flexible delivery system based on project schedules.

Our priority: delivering innovative and high-quality products on time.

Business foresight and product ingenuity, combined with the talent of more than 400 Groupe Lessard team members, make it possible to carry out the most daring projects!

Our success is driven by our employees, suppliers and partners.


Lessard.ws - SYMPHONIA POP4


Montreal – Borough of Verdun (QC)

Lessard.ws - agropur7


Saint-Hubert (QC)

The Agropur Campus is a two-storey LEED-accredited office building located on a heavily wooded site.



Montreal – Borough of Ville-Marie (QC)

The building integrates into the historical Holt Renfrew Ogilvy complex with its sleek black facades.


The careful selection of raw materials, robust assembly and the most rigorous quality control in the industry guarantee the high quality of all Groupe Lessard products.

Have a project for us?

Scroll to Top