CML started work on York Station roof for Network Rail during the summer, refurbishing sections of the roof, including waterproofing the barrel arches and the replacement of damaged glazing.
The physical works involve cleaning and preparing the valleys prior to applying a base coat of deco-thane ultra solution to the existing felt material. This is then lined with glass fibre mat reinforcement whilst the base coat is applied, allowing a final topcoat of deco-thane solution to be installed. In wind-exposed areas of the valleys, a Sikalastic metal primer is applied to ensure that the waterproofing solution meets the design specification.
To tidy up services on the roof, we recently installed new cable trays along the barrels and tied back loose cables to protect services and provide safer access. We’re also in the process of installing a new safety line system, to provide safe access across the glazing walkways.
All the glazing replacement work is being carried out during night shifts under possession and isolation of the railway below. Damaged glazing panels are being replaced, displaced panels re-secured in position and installing new sealant where required. The glazing element of the works are 90% complete, with the current scope of waterproofing work programmed to complete early in the new year.
A roof of this scale will always present challenges with scope creep, but working in collaboration with Capital Delivery, MHB Consultants Ltd and our supply chain partners, we have collectively and proactively mitigated any negative impact through applying value engineering to achieve minimum viable product.
The project is progressing on programme, with a high-quality finish being achieved by the delivery team.
