Stirling Lloyd's market leading Integritank® structural waterproofing membrane has being used to protect the upper viewing decks of one of the UK's newest and most prestigious landmarks.

Designed by International Consultants Scott Wilson, the £38m Spinnaker Tower is the focal point of Portsmouth Harbour's UK Millennium Commission sponsored Renaissance Project. Soaring 170m above sea level, the concrete and steel tower will be the tallest publicly accessible structure in the UK, outside London, once complete.

Stirling Lloyd were consulted by Main Contractor Mowlem who required a high performance waterproofing system which could be easily and safely applied to the plant rooms and the uppermost viewing deck, at 100m above sea level and the crow's nest, built at 134m above sea level. They were looking for a cold applied system, which would have minimal plant and equipment requirements and could be easily transported to the upper levels of the tower via the attached temporary goods hoist.

Stirling Lloyd proposed using the Hand Grade version of their Integritank® waterproofing membrane, which was specifically developed for applications to small areas or where restrictive access prevents spray application.

Integritank® is a BBA certificated two component, cold liquid-applied system based on methyl methacrylate (MMA) resins, which cure rapidly to form a tough, 100% effective waterproof membrane. It provides a finished surface that unlike preformed sheet membranes is seamless with no vulnerable joints or raised laps, and is fully bonded to the substrate.