48 Leicester Square


City Structural waterproofingProject Details

Structural Waterproofing Project Details

48 Leicester Square Structural Waterproofing Project

This historic landmark on Leicester Square required revitalising so as to enhance its external appearance whilst maximising internal floor space within the constraints of the existing retained Grade 2 listed facade. Make Architects produced a design which included the construction of a two storey basement and the addition of an extra level to produce a mansard style roof.

The requirement was for a flexible yet robust structural waterproofing design in accord with BS8102:2009 which was supported by the appropriate design and system warranties. FIS were able to provide a strategy within the budget constraints which exceeded the clients requirements whilst ensuring practicability of installation.

The waterproof layer beneath the basement slab incorporated a combination of a bentonite membrane and a crystaline cementitous coating to the top of the pile caps to provide full protection. The risks associated with this deep basement structure demanded the use of a maintainable waterproofing system to manage any water ingress through the walls; therefore a cavity drain membrane was installed to the thoroughly prepared secant pile basement wall with a maintainable conduit installed at the base. Particular attention to detail was then required to provide continuity where the new structure interfaced with the existing retained structure.

  • Commercial Structural Waterproofing
  • Structural Waterproofing Project