Client: 22 Marsh Wall
Type of works: supply of type K Isokorb^® concrete-to-concrete connections.

The iconic Landmark project at 22 Marsh Wall, close to Canary Wharf, is fast taking shape. Four structures make up the development, but the focus is on the two high-rise towers, the 31-storey west tower; and the stunning 45-storey east tower, which, at a height of 140m, means it would look down on the majority of residential developments anywhere in Europe. The building also boasts the most residential units in any one building in Docklands.

The east tower and its neighbours is a mixed-use, high-density development with sustainability and ecology high on the agenda. The scheme even incorporates its own biomass heating plant. A series of public spaces will encourage pedestrian flow through the scheme, the focal point of which will be a central public square with cafes and restaurants.

Avoiding the risk of thermal bridging is vital on the project, as elements such as balconies and other cantilever connections which project through the building envelope, breaking the insulation layer in the process, are notorious for creating this phenomenon. The connectivity solution designed into the scheme is the module known as the type K, specifically for concrete-to–concrete connections. The type K Isokorb^® has outstanding thermal insulation properties and dramatically reduces thermal energy loss in connective areas by guaranteeing the homogeneity of the thermal envelope between cantilever structures and the internal floor. It also transfers load and maintains full structural integrity, while at the same time enabling inner surface area temperatures to remain well in excess of those likely to cause mould formation and condensation – both of which are completely eliminated in room areas adjacent to the balconies.

A key element in the design of the type K Isokorb^® is the HTE (high thermal efficiency) module. This is a pressure-bearing pad made of high-density micro-fibre reinforced concrete, a highly effective HCFC-free polystyrol hard-foam insulation layer and stainless-steel connectors – all of which result in the best thermal performance achievable.