BS8102 Does say that if the risk of water penetration is high, if for example there is a high water table and masonry construction then two forms of waterproofing should be considered. In this situation we would recommend our Crystal coat system for concrete structures or external waterproofing for blockwork or ICF structures as well as a cavity membrane system inside. The external system would protect the structure and prevent water penetration, however it is the internal cavity membrane that carries the guarantees and is covered by
Maclennan design liability
Unlike most installers of waterproofing systems Maclennan pay for full products insurance and professional indemnity, so that all Maclennan advice specification and installation is covered for all eventualities. Thus giving total peace of mind to our clients.