Carlisle Station Roof Renewal

Written by Peter Matthews Associate Director

Carlisle Citadel Station is an architectural gem. Constructed in 1847 the Grade II* listed building supports an elegant glazed roof with a 50m clear span. Time has taken its toll and the roof is now failing and beyond reasonable repair.

Investigation of the roof structure has indicated that the existing steel roof trusses have sagged due to age and due to the effects of a radical shortening of the existing roof span within the 1950s. The effects on the existing rigid glazing system and the roof drainage are severe, causing ponding of rainwater, leakage and breakage of multiple glazing panels.

The challenge for Jefferson Sheard has been to provide a sensitive, but contemporary roof replacement whilst preserving the original architectural aesthetic and without disruption to the ongoing rail and passenger activity below.


  • Transport & Infrastructure


Arcadis / Galliford Try / Network Rail




Working closely with Network Rail, Galliford Try and Arcadis, we have proposed a comprehensive replacement of the roof covering with a singly ply ETFE glazing system. It is an approach which reduces the loads on the existing structural trusses so as to minimise any further sagging and which provides movement tolerance to allow the existing structure to ‘breathe’. Careful assessment and re-creation of the existing glazing bar modules provides a visual aesthetic which is fully in keeping with the original design intent, whilst using modern materials to overcome technical difficulty is completely in keeping with the design ethos of the original Victorian designers.

Go to Build


Listed Building Approval has been granted with construction work scheduled to start in summer 2016. Speed of erection of the ETFE system is offering significant reductions in the programmed construction period, minimising disruption to ongoing activities below.

The Team

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