Canterbury Riverside Square B11-13 Car Park Case Study

THE PROJECT

Canterbury Riverside is a major new residential development designed by PRC Architecture for Bouygues Development\Link City. Its construction has been in progress since 2020, and in January 2022, the main contractor for one of the housing elements, Jenner Ltd, commenced work on the below-ground Block 11-13 car park. Jenner appointed specialist contractor GSE to install a new ground bearing slab within the car park, which would tie in with existing columns and retaining walls. The dimensions of the slab required movement joints to be accommodated and there were multiple access points that required waterproofing detailing. The design and installation was also required to meet the requirements of the NHBC (National House Building Council), so Fosroc was appointed to supply materials, and Waterproofing Design Services to carry out the design work. Jenner had previously worked with both Fosroc and WDS on block 14 of the project to provide gas resistant membranes and design.

THE SOLUTION

Supercast Crystalline Waterproof concrete was selected due to its robust waterproofing response to any potential ingress through the ground bearing slab. Supercast PVC waterbars were also installed at every movement joint, with the complete Fosroc joint solution installed via Hydrocell XL closed cell compressible joint filler and Nitoseal MS300 joint sealant, which protected the joints against damage from traffic. Care was taken to design a fully linked waterproofing system around the joints between the new slab and existing column bases. This element was closely coordinated with the installing contractor (GSE).

THE BENEFITS

Pour sizes and schedules were optimised by careful design and coordination. A flexible and fully watertight solution was achieved, and regular dialogue with the installing contractor ensured obstacles were swiftly overcome. Feedback from GSE was positive, with Site Manager Darren Knight commenting “This was the first time we had installed the FOSROC products on a waterproof detail. The advice and the back up from the team was very good and Paul Hitchins was on hand all along the install route to aide any issues, promptly answering our questions. The products were easy to install, and regular on-site inspections ensured a smooth install throughout. I would have no issue installing this product on any other job when specified.”