Senior Architectural Systems is marking its 35th anniversary, celebrating more than three decades of growth, investment and product development within the UK aluminium fenestration industry.
Established in 1991, the company has grown to become one of the UK’s leading manufacturers of aluminium windows, doors, curtain walling and ancillary systems. Over this period, Senior has expanded its operational footprint and product portfolio, with a commitment to developing future-proof and energy-efficient solutions to meet the evolving needs of the construction industry. In March 2025, Senior entered a new phase of growth following its acquisition by ASSA ABLOY, supporting further expansion of its manufacturing capabilities and strengthening its position in the UK market.
Over the last 35 years, Senior has invested significantly in its manufacturing and distribution facilities in South Yorkshire, including the opening of a dedicated Thermal Improvement Centre in Rotherham. The company continues to operate from its headquarters in Denaby, where recent upgrades to the in‑house powder coating facility have continued to support greater efficiency and quality control.
A major highlight for the company came in 2015 with the launch of Senior’s patented PURe® thermal break technology. The system secured a UK patent the following year and went on to receive a King’s Award for Enterprise in Innovation. Senior’s PURe® range of aluminium windows and doors has supported a wide range of projects across the education, healthcare and residential sectors and remains a core part of Senior’s product offering.
Since 2019, the company has also been the proud host of Aluminium Day, a dedicated awareness day for the aluminium industry which provides an annual platform to celebrate innovation and success across the supply chain.
Mark Wadsworth, Managing Director, comments: “Reaching our 35th anniversary is a proud moment for the business. Our progress has been driven by continuous investment and by the strong relationships we have built across the industry. As we look to the future, our focus remains on supporting customers with more sustainable products, transparent data and ongoing improvements to our manufacturing capabilities.”
Reducing the environmental impact of its business operations and providing customers with sustainable and efficient aluminium fenestration products remains a core part of Senior’s future plans. Most recently, the manufacturer launched its suite of Environmental Product Declarations (EPDs) which, based around the promise of ‘what you see is what you spec’, have raised the bar in terms of the level of clarity and accuracy available for aluminium fenestration products.
Senior will be marking its anniversary across its social media channels over the coming months, sharing a series of company milestones and project highlights that showcase the breadth of its work across the commercial, residential and public sectors.
For more information, visit www.seniorarchitectural.co.uk or search for Senior Architectural Systems on LinkedIn, Instagram and Facebook.
About Senior
Established in 1991, Senior Architectural Systems is one the UK’s largest aluminium fenestration systems house and was acquired by ASSA ABLOY in March 2025. Read all about that here.
The company manufacturers a wide range of aluminium curtain wall systems, doors, and windows. In 2015, it launched its low U-value PURe® aluminium window system for which it was awarded a UK patent (GB252363.8). The patented range now includes a full suite of PURe® aluminium windows in a variety of opening styles, PURe® FOLD bi-fold doors, PURe® SLIDE sliding doors and the PURe® Commercial Doors – Senior’s largest and strongest door to date.
Senior is also the founder of the #AlumniumDay industry-wide social media event which takes place every year on March 13th to help raise awareness of the innovation and success within the aluminium industry. For more information, be sure to click here.
