London Bridge Station

London’s oldest station receives a significant upgrade to meet its increasing demands including optimum performance floor insulation.

The Project

The Kingspan OPTIM-R Flooring System has been installed as part of the £1bn refurbishment of London Bridge Station. The floor insulation was specified in two retail units due to its optimal thermal performance. This allowed the construction depth to be minimised, providing an even transition for shoppers entering from the concourse.

London Bridge Station is currently one of the busiest railway stations in the country with approximately 56 million travellers passing through every year. To meet rising passenger numbers, the station building was redesigned by Grimshaw Architects. The new building now contains the largest concourse in the UK, with a radius surpassing the pitch of Wembley Stadium.

Kingspan OPTIM-R Flooring System
Network Rail
Grimshaw Architects

A Step Ahead

Some of the retail units constructed on the lower concourse were situated directly above uninsulated platform space. As such, specifiers required an insulation solution which could provide the required thermal performance in a slim thickness — avoiding the need for a step-up from the outer concourse. With an insulation performance up to five times that of commonly used insulation materials, Kingspan OPTIM-R vacuum insulation panels (VIPs) provided a clear solution.  

Kingspan OPTIM-R panels have a microporous core which is evacuated, encased and sealed in a thin, gas-tight envelope. With this design, the panels achieve a declared thermal conductivity of 0.007 W/m.K. The VIPs were installed as part of the Kingspan OPTIM-R Flooring System. OPTIM-R flex infill strips of the same thickness are also supplied with each system to fill awkward gaps and to allow penetrations in the insulation layer.

The Kingspan OPTIM-R Flooring System was specified in a 25 mm thickness which was fitted above a 3 mm rubber crumb layer and then a screed overlay. Despite the slim build-up, the outstanding thermal performance of the OPTIM-R Panels ensured the units met their U-value target.
20 - 40 mm thick Kingspan OPTIM-R panels are also certified under the demanding BDA Agrément scheme. This independent certification is accepted by NHBC and the LABC and confirms that the products will perform as expected when installed to Kingspan Insulation’s recommendations. This can help accelerate projects through the procedures and approvals process thus reducing project costs.

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