Our history
Built on innovation. Defined by growth.
Since its founding in 1989, Keystone Lintels has grown from a small, ambitious manufacturer in Cookstown, Northern Ireland, into the UK and Ireland's leading producer of steel lintels.
What began as a bold idea to challenge traditional thinking and engineer smarter, more efficient building solutions has evolved into a business built on innovation, collaboration and trust. Our early commitment to product development and close collaboration with customers laid the foundations for the company we are today, defined by reliability, technical expertise and forward-thinking design.
We take pride in our heritage, but we are equally driven by what comes next.
Leading with purpose
Building on its foundations in Cookstown, Keystone Lintels expanded its manufacturing operations with the opening of a second facility in Swadlincote, Derbyshire. This investment increased production capacity, introduced new technologies and strengthened our ability to serve customers across the UK and Ireland.
Our focus on continuous improvement and technical excellence drove a series of industry-first innovations. From the introduction of advanced galvanised steel lintels to the launch of Hi-Therm+, the most thermally efficient lintel on the market, Keystone Lintels continued to push the boundaries of performance and sustainability.
This relentless pursuit of innovation helped transform the company from a regional supplier into the UK’s and Ireland’s leading producer of steel lintels, trusted by architects, engineers, builders and merchants alike.
A relentless drive to improve
A relentless drive to improve has shaped Keystone Lintels throughout its history. Through continued investment in product development, technical expertise and manufacturing capability, we have expanded our range and developed solutions that respond to changing construction requirements.
This commitment is reflected in innovations such as Hi-Therm+, which brought a new approach to lintel thermal performance. By continually reviewing how our products are designed, manufactured and supported, Keystone Lintels remains focused on delivering greater performance, efficiency and value for customers.
Building on our legacy
The future of construction continues to evolve, and so does Keystone Lintels. Through ongoing investment in product development, manufacturing capability and technical expertise, we remain committed to delivering high-performance solutions that meet the changing needs of the industry.
While our business has grown significantly since 1989, the principles that have guided us from the beginning remain unchanged: engineering excellence, continuous innovation and exceptional customer support. As we look ahead, we will continue to invest in the people, products and technologies that help shape the future of construction across the UK and Ireland.
Part of the Keystone Group
The strength of the Group has played a vital role in our continued growth. Shared expertise, collaborative innovation, and a commitment to excellence across every brand have allowed us to bring new ideas to market quickly and serve the construction industry with agility and confidence.
Together with our Group partners, we continue to invest in technology, manufacturing, and people to drive progress across every area of the business. The Group’s success reflects the same entrepreneurial spirit that has defined Keystone Lintels from the very beginning.
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£300m
Turnover
With ongoing investment to our business, we are continually growing.
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2000+
Employees
Working towards the same goal, creating smart construction solutions, beyond equal.
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1.6m ft2
Manufacturing space
Providing innovative construction products, globally.
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28
Sites throughout Europe
Housing state of the art facilities for our dedicated teams.
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About
Find out more about Keystone Lintels
Keystone Lintels has been a trusted name in the construction industry, delivering high-quality steel lintels backed by innovation, expertise, and exceptional customer service. Discover the story behind our success, meet the people who make it possible, and learn more about the values that continue to drive our business forward.
