Waterproofing of Two-Storey Basement in Central London
The Rolls Building is an eight storey commercial building in Central London that is currently used by Her Majesty's Courts Service. It has a two storey basement that was constructed using secant piling.
A variation of the "piled wall" basement waterproofing system featured on this website was employed for the project with Oldroyd Xv cavity drainage membrane being applied to the piled walls and Oldroyd Xv20 cavity drainage membrane being applied to the lower floor of the basement. Over 6300m2 of Oldroyd membranes were used as part of the basement waterproofing project.
Although the Oldroyd cavity drainage approach to waterproofing was used for the majority of the basement, Vandex cementitious waterproofing products were used in some areas. For example, the crystalline-active Vandex Super product was used to waterproof pile caps. Vandex BB75 and Vandex Unimortar 1 were used to waterproof details that would have been impractical to waterproof using a cavity drainage approach - e.g. service duct channels and manhole inspection points. Approximately 2300m2 of the basement area was waterproofed using Vandex products.
Work on the basement waterproofing commenced in Autumn 2009 and the building was officially opened by HM The Queen in December 2011