Beyond the building, it's about people!

A company committed to professional excellence in building mechanics.

Founded in 1977, our vision has never changed, and our motto has always remained the same. We devote significant effort to cultivating our employees’ sense of belonging, which enables us to exceed our clients’ expectations.

Since 2011, we have experienced strong growth, driven by our mission to strengthen our role as a major player in the building mechanics market in ventilation, air conditioning, and refrigeration sectors.

Our vision compels us to consistently provide professional design, installation, and maintenance services in close collaboration with our commercial, industrial, and institutional clients.

To all our employees, we commend you for your dedication and commitment. Your consistency and hard work allow our company to stand out through the quality of client relationships and the innovative actions resulting from the ideas you share with us.

To all our clients, we are grateful to design and carry out numerous projects with you. It is thanks to you that we strive to surpass our limits and rise to the challenge of delivering a unique offer tailored to your needs.

Firmly established in Québec, LS continues its growth across the major sectors driving our economy.

Qualifications – Certifications

GOLD certification: from the Integrity Program awarded by the Quebec Construction Association, acknowledging our ethical risk management framework and that of our business partners.
Office québécois de la langue française: registration in the official language charter registry.
Mentorat Québec accreditation Mentorship Accelerator.
Certified “Worksite Gender Diversity” Recognition of collective commitment by the ACQ.
Member of CNESST
Membre de la CCQ
Member certificate from CMMTQ. recognized as a Master Piping Mechanic in Québec.