Doing The Durham Business

A office building with a glazed wall

Over 90 Optima windows from Epwin Window Systems have been installed in Langton Business Centre which occupies a prominent location in County Durham.

Home to around 25 business, the building’s 90 first-generation PVC-U windows had come to the end of their useful life. The landlord wanted to replace the windows to provide a more contemporary appearance and refresh the kerb appeal for the site’s occupants.

Equally as important was to upgrade the thermal efficiency of the buildings to enhance sustainability.



The contractor selected for the work was Epwin Window Systems approved commercial partner Swainstons which has been a commercial contractor since 1964.

Swainstons manufactures the Optima system. General manager Liam McClorey, says: “Optima is straightforward to fabricate and offers the aesthetics and performance that commercial projects need.”

For this project, Swainstons used the Optima sculptured window system. The 90 windows were manufactured in anthracite grey on white and used bronze tinted double-glazed units to achieve a contemporary finish that sat well with the surroundings.


Thermal efficiency

The system features a 6-chambered outerframe and 5-chambered sash, which can be used with RCM inserts to increase the number of insulating chambers. It has optional centre seals to the outerframe and sash and a 10mm overlap for improved weatherability.

The slimmer frame gives more light and improved solar gain, adding further thermal advantage.

These features mean the system was comfortably able to achieve the project specification of a Window Energy Rating of A.



As Langton Business Centre is home to around 25 active businesses, the four-week installation needed to be carefully managed – something that came naturally to Swainstons which undertook a comprehensive risk assessments to ensure the safety of the building’s occupants and to minimise disruption.


Picture: Langton Business Centre in Durham has benefitted from a refurbishment featuring Optima windows from Swainstons and Epwin Window Systems.

Article written by Cathryn Ellis
13th September 2023


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