When did we open our manufacturing facility and head office?

Founded as a family business, ROCKWOOL has a history of responsible environmental practices, developing community partnerships, and investing in the communities in which we operate globally. Our first production facility in North America – located in Milton, Ontario is an example of just that.

Having opened in September of 1988 and now in operation for more than 35 years, we are a proud neighbour and continue to partner with the community by investing in sustainable operations and getting actively involved in local programs and causes that support the wellbeing and prosperity of local residents.

The 750,000-square-foot manufacturing plant is located on Steeles Avenue. The facility was purchased as a brownfield site from Lafarge Canada, brownfield meaning that the land was previously used for industrial purposes.

In 2008 we expanded the Milton site, increasing production capacity and creating 100 additional local jobs, before finalizing construction of our corporate headquarters for the region in December of 2014 located on Esquesing Line.

For a detailed look at what it means to have ROCKWOOL in your community, we created a Community Brochure. It covers everything from how our manufacturing facilities operate to working at ROCKWOOL and our social responsibility efforts to support local programs and causes.

Rattlesnake Point Is Beautiful With A Great View in the Milton, Ontario community showing the natural environment and green space.

Respecting the local environment

As a proud neighbor of the communities in which we operate, ROCKWOOL is continuously working to improve the sustainability of our operations, so that we leave the smallest footprint possible to safeguard the local environment.

Learn more about our commitment to sustainability
ROCKWOOL is a positive and contributing member of the Milton community and surrounding areas. Certainly, in our case with the Halton Learning Foundation, ROCKWOOL’s support of individual students in need has been tremendous.

Lesley Mansfield

Executive Director, Halton Learning Foundation

How does our factory operate?

Our manufacturing facilities are an example of advanced and sustainable operations. In Milton, we continue to look for opportunities to reduce energy consumption and have done so through investments in new technologies such as lighting retrofits, conducting regular internal audits to identify areas for improvement, and participation in Milton’s Hydro Voluntary Transitional Demand Response Program to scale back energy usage during peak times.

The Milton manufacturing facility produces our insulation products for residential, commercial, and roofing applications, as well as our full line of Grodan horticultural solutions. Producing our products in the most environmentally-responsible manner is a commitment we take very seriously at ROCKWOOL. In fact, as a company, we are holding ourselves accountable against commitments to several of the United Nations Sustainable Development Goals. The Milton facility is working diligently to reduce CO2 emissions, improve water and energy efficiencies, and minimize waste to landfill.

How’s our progress? Well today we can say that our Milton plant operates with  minimized waste to landfill, uses heat recovery systems that capture heat from the production process to heat the building, has on-site recycling to transform production waste into usable raw materials, and just as is the case with all our facilities worldwide, our production process is designed for zero wastewater discharge to the environment.

A modern operation that utilizes state-of-the-art equipment and people working together to ensure the highest standards of employee safety and product quality, that’s manufacturing at ROCKWOOL Milton, Ontario. The process of manufacturing stone wool is something our organization has continued to refine over the course of our history and the below video gives you an up-close and personal experience of today’s operations.

Have a question or concern?

Please don’t hesitate to let us know and a member of our community relations team will follow up with you.



People working together, doing their jobs, teamwork, plant operations at the production manufacturing factory facility in Milton, ON

Advanced Manufacturing Factory Tour

Operating 24/7, our Milton, Ontario production facility consists of a hot end process and a cold end process. This facility is run by a balanced combination of the latest technology and people, working together to ensure the highest standards of employee safety and product quality.

We reuse so much of our production waste and are a really forward-thinking company when it comes to sustainable operations. That’s something that in our climate today is only getting more important, and as time goes on I think ROCKWOOL will continue to be a leader.

Adam Churchman

Production Supervisor, ROCKWOOL

How are we positively impacting the community?

We take great pride in making a significant and positive impact in the communities we are part of. In Milton, we’re supporting infrastructure and programs through partnerships with organizations including the Milton Chamber of Commerce, the United Way, Halton Food for Thought, the Halton Learning Foundation, Habitat for Humanity, and local events including the Downtown Milton Street Festival.

From the factory floor to the corporate headquarters, we also provide meaningful career opportunities. We continue to drive growth by investing in our employees – making ROCKWOOL an organization of opportunity, and one that continues to show stability through the long-term investments we’ve made into the community.

We are also focused on building a reliable network of suppliers and contractors to support our day-to-day operations. Interested local businesses should visit our landing page to learn more and apply to be part of our supplier network.

When the ROCKWOOL Milton, Ontario production facility initially opened, there were approximately 75 employees. Today, there are more than 270 salaried and hourly workers helping to drive production of stone wool products made from stone – one of the earth’s most abundant natural resources – and engineered into solutions for insulation and horticultural applications that help to address energy-efficiency, urbanization, and climate change.

Our corporate office employs approximately 130 team members working in areas ranging from marketing and business development, to finance, supply chain, IT, customer service, communications and public affairs, sales, technical support, and human resources.

Our success has always been built on strong teams with a passion for what we do and a commitment to ROCKWOOL’s purpose – releasing the natural power of stone to enrich modern living. We bring a track record of empowering our workforce and creating a workplace culture where employees receive the training and development they need for career advancement.

See below for an overview of current job openings with ROCKWOOL Milton, Ontario at both our manufacturing plant and corporate head office.

marshall county, mississippi, Mar 4, tile plant, manufacturing, Rockfon, ceiling tile, cartons, distribution

Working at ROCKWOOL

Meaningful careers in manufacturing with job stability and security for Milton, Ontario employees.

Encouraging, friendly and productive work environment. Peers are sociable and there are many events and opportunities to network and engage with co-workers. The work provided was meaningful and the conversations with my team and management gave me insight into the industry and my career path.

Current Employee (Glassdoor)

ROCKWOOL Milton, Ontario

More information about ROCKWOOL

My impression of ROCKWOOL is that they like to be good corporate citizens, they treat their employees well, and they care about the environment.

Kate Holmes

Director of Development, Townsend Smith Foundation