Delta Membrane's has provided its waterproofing systems for the 1-9 Seymour Street redevelopment project. The scheduled demolition and clearing of the orginial site was to make way for a new seven storey mixed use building, which was to include a two level basement, residential block, restaurant, retail space, commercial office block and school.

An initial and important consideration in the overall waterproofing strategy was to ensure that all construction joints were appropriately detailed and waterproofed using Hydrophylic waterstops – such as Koster Quellband, which expands in contact with water to seal the construction joint.

Delta Membrane Systems Limited’s NB1 in-depth migratory crystalline slurry (a Type A System, a water barrier), and Delta MS500 and Delta MS20 (a Type C System, cavity drain membrane system) was used. Having applied a Type A waterproofing system it was then decided to add a secondary Type C system offering a robust waterproofing design.

The basement structure has been constructed to cope with any future water ingress and will withstand the test of time. Main contractor Galliford Try were thrilled with the outcome. The project was achieved on time and within budget.