Scottish Water Treated Water Storage Refurbishment

Challenge

During the excavation works to fully expose the cladding, Mackenzie Construction discovered significant points of potential ingress through the existing cladding system. For operational reasons, Scottish Water stressed that this tank needed to be online as soon as possible to avoid putting strain on the network. Due to the construction of the roof, conventional methods of repair could not be applied to this asset. There was an option of installing a new tank roof, however, this would incur considerably increased costs, increase carbon emissions and would require external and internal approval of the design, causing delays on the project and further stress on the network. Therefore, we had to innovate and examine other remedial options.

Solution

The solution that MCL developed was to design & install a new bespoke cladding system which would be installed between the existing roof structure and the protruding sandstone walls. The depth of the drainage had to be increased as the existing level was found to be contributing to ingress issues. We increased the drainage depth down to 1.2m to prevent ingress issues.

Following the installation, a flood test was conducted which demonstrated the success of our intervention. Shortly after, the site experienced a heavy downpour of rain which further proved our intervention of bringing the water level 1.2m below ground level as no ingress was reported following an internal inspection.