About Conestoga Roofing & Sheet Metal Ltd.

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Conestoga Roofing
Company Profile

Conestoga Roofing & Sheet Metal Ltd. was established in 1982 and has since provided roofing systems for commercial, industrial, and institutional buildings.

As a commercial roofing contractor, our company is a preferred supplier of roofing systems across Southern Ontario because of our established expertise, fully staffed crews, administrative staff, skilled estimators and our complete equipment and mechanical fleet.

We are proud to service the following areas: Cambridge, Kitchener, Waterloo, Milton, Mississauga, Toronto & GTA, Niagara Falls, Barrie, Kingston, St. Catharines, Brampton, Hamilton, Oakville, Parry Sound, and much more.

Conestoga Roofing Headquarters with Truck

Our Experience is
Our Advantage

The depth of experience and knowledge that Conestoga Roofing has in replacing, repairing, and new roof construction, along with our solid reputation for excellent workmanship means that our customers are fully satisfied with every project, at every step, from detailed estimates through to final clean up.

Commercial and industrial roofing requires a full complement of specialized equipment and vehicles. As a fully outfitted roofing contractor, Conestoga Roofing uses industrial roof conveyors, asphalt tankers, automatic welders, odorless kettles, and a complete “roll off” system with disposal bins for removing debris and the delivery of gravel and material.

Continued Growth
and Expansion

Conestoga Roofing is a continuously growing company, and we are maximizing our construction-related skills by offering a variety of related services under our “Conestoga Umbrella”. We are the proud operators of Roof Rock Removal Inc. where we have newly purchased a roof rock vacuum system which reduces labour costs as well as airborne dust and debris. We also are able to service our clients with services from Conestoga Waterproofing Ltd. to ensure watertight solutions and project longevity. Additionally, we operate Conestoga Solar Inc. which is a full turnkey photovoltaic business specializing in large commercial FIT projects.

is the Difference

Our Project Managers and Site Superintendents are highly trained, and some have achieved their Gold Seal Certification, which is the Canadian Construction Associations industry’s highest level of educational and professional achievement. Led by a Professional Engineer, all of Conestoga Roofing’s employees are dedicated to continuous improvement and ongoing training on all roofing systems (Including: EPDM, PVC, Modified Bitumen, Built Up Roofing, Metal Sloped Roofing). We have designated crews to specialize in each type of roofing system to ensure the top-trained roofing experts are working on your roof.

As members of the Ontario Industrial Roofing Contractors Association (OIRCA), we work to promote excellence in roofing construction through good business ethics, ongoing training and education, and compliance with the latest standards of occupational health and safety. We provide our customer with the highest standards of service and the finest quality of workmanship.

Safety First,

Conestoga Roofing is proud of its flawless safety record and is committed to ensuring every worker goes home at night safe and healthy. It is our commitment to our employees that the safety of their working environment is of the highest priority. We are a charter member of the GVCA Safety Group.

We assure the highest standard of responsibility, accident prevention, emergency procedures, accident/incident reporting and investigation is followed. We perform the work of roofing and related activities in the safest possible manner and we recognize the need to comply with the Occupational Health and Safety Act and with all current Federal, Provincial and Municipal occupational health and safety requirements in addition to our own corporate health and safety policy.

We promote safety awareness. We eliminate hazards and attitudes that cause accidents and injuries. Health and safety will not be compromised for expediency and unacceptable performance of the health and safety duties will not be tolerated.

Safety is our #1 priority and as such we have implemented a Health and Safety Policy and Program.

Our History

Conestoga Roofing and Sheet Metal Ltd., provides roofing systems for commercial, industrial and institutional buildings and has been operating since 1982.

Since 2010, Mark Mollison has been leading Conestoga Roofing as President. Mark is a Professional Engineer with a Civil Engineering degree (BASc) from the University of Waterloo. Throughout his career he has been a Project Manager for a large industrial construction firm, and was employed at Toyota Motor Manufacturing Canada where he gained additional insight into production and manufacturing.

Since Mark has taken over the Management of Conestoga Roofing, he has identified several areas for efficiency gains. Conestoga Roofing has been able to reduce our energy consumption and identify multiple areas for productivity improvement. Mark has also mandated that all employees at Conestoga Roofing become Red Seal Licensed as applicable to their trade.

Mark’s priorities are Safety/Environment, Quality, Productivity, and Cost, and believes these priorities work hand-in-hand to achieve success. Thorough planning with safety in mind allows Conestoga Roofing to prioritize environmental factors, operate efficiently to achieve high standards of productivity and quality for customers. A continuous improvement mindset allows Conestoga Roofing to strive for excellence and efficiency in order to remain competitive in our sector, and provide outstanding service, quality work, and cost-effective solutions to our customers.

Mark and the entire team at Conestoga Roofing is proud to call Waterloo Region home. We are committed to giving back to our local community and the roofing and construction industry. Conestoga Roofing has supported the local arts community through the Kitchener-Waterloo Symphony where Mark served as a board member. Currently, Mark sits on the board of the Grand Valley Construction Association and the Ontario Industrial Roofing Contractors Association.

We Are the Future in Roofing

We have multiple memberships with different business and construction associations, and our reputation is rock solid. We uphold the highest standards and expect the best quality of workmanship for each of our projects. The future will only get better for us as we continue to grow and expand.


Join the Conestoga Roofing Team! As a leading roofer in Waterloo Region, we offer competitive wages and benefits, and opportunities for advancement.

Safety & Awards

At Conestoga Roofing, we are committed to safety a nd quality. Learn more about our approach to safety, and recognition we have received from industry partners.

Community Involvement

At Conestoga Roofing, we believe in giving back to the community. Find out how we have worked to improve the roofing industry, and to contribute to causes meaningful to our team.

Our Awards & Memberships

Conestoga Roofing has been honoured with many industry awards over the years and we are proud of each of them. Our awards include:

Roofing Contractor of the Year

2001, 2003
from Grand Valley Construction Association

Contractor of the Year

from Ontario Industrial Roofing Contractors Association

Integrity Award

from Better Business Bureau

Small Business Award

from Waterloo Region Business Achievement Awards

Building Excellence Awards

from Grand Valley Construction Association

Annual Readers' Choice Award

from Guelph Tribune

Certificate of Recognition

2005, 2006, 2007, 2008
from Skills, Trades & Apprentice Showcase

Roofing Trade Contractor of the Year

2001, 2003
from Patene Building Supplies Ltd.

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