16th May 2019

Knowledge Type

Case study Lessons learned report


, Network Rail Ltd

Major Project

Thameslink Programme

Of Interest To

Academia Consultants Contractors Operators Private sector clients Public sector clients

Thameslink: Flooring Insulation


Some of the retail units constructed on the lower concourse were situated directly above un-insulated platform space and 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.

The Kingspan OPTIM-R Flooring System was installed as part of the redevelopment of London Bridge station and was specified in two retail units due to its optimal thermal performance. This allowed the floor construction depth to be minimised, providing an even transition for shoppers entering from the 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’s panels have a micro-porous 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 were also supplied with each system to fill awkward gaps and to allow penetrations in the insulation layer.