Holborn Viaduct

Nestled in the City of London, Holborn Viaduct features multiple levels, ground and ten upper floors to the viaduct – plus 12 upper floors to Farringdon Street to provide a new commercial, business and service building.

The Challenge

• This project included a very challenging structural design, with multiple levels.
• The rear of the site was adjacent to five storeys of the viaduct, and the front of the site is at street level.
• With a total of four levels, this very deep basement included complex interfaces with existing structures.

The Solution 

• We needed to remove the need for a pre-applied waterproof membrane and design with a waterproof concrete and cavity drain system.
• The conclusion was to utilise Premcrete’s Hydrocrete concrete admixture, as well as Hydroflow.