Overview

Structural waterproofing products from Newton are being used in the transformation of the unique, Grade I listed Cambridge House in Piccadilly as part of its conversion into one of London’s grandest hotels. The 18,000m2 scheme includes six adjacent Grade II listed residences, whilst a four-level basement will accommodate a spa as well as the back-of-house and servicing areas.

There are three main buildings where extensive excavations are taking place, requiring different waterproofing solutions to cater for the new-build basement areas and existing elements - all up to four storeys below ground.

Project detail

In order to deliver a reliable, watertight solution for this project, Newton worked closely with architect PDP London and leading enabling works contractor Deconstruct UK throughout the design and installation.

Buildings 1 and 3 benefit from full Newton CDM System cavity drain membrane waterproofing which will capture, depressurise and remove any ingressing ground water via a series of Trojan-Pro pump chambers.

Building 2 utilises numerous products across new / existing structures, including 403 HydroBond, installed by NSBC Maclennan Waterproofing, and 315 Polymer-Waterbar to the new concrete attenuation tank, which will also be coated internally with the 103-S liquid membrane.

The same two products were also used alongside the flexible 107F liquid membrane and 106 FlexProof for construction joint waterproofing in areas where the existing brick structure interfaces with a new concrete slab. Finally, Titan-Pro pump chambers are being installed to remove the water.

Products used

  • Cavity drain waterproofing: System 500
  • High-performance cementitious coating: HydroSeal 103 2K
  • Flexible construction joint waterproofing: FlexProof 106 System
  • Cementitious flexible waterproofing membrane: HydroSeal 107 Elastic 2K
  • High-grade hydrophilic waterbar: HydroTank 315 Waterbar
  • Waterproofing membrane and gas barrier: HydroBond 403 Plus
  • Cavity drain pumping system: Titan-Pro Pump System

Result

As of June 2021, the waterproofing installation is underway and on-track on all three buildings, with Newton’s site services team delivering an exceptional quality assurance and training service on the installation of its products.

Testimonial

"Newton Waterproofing have been working with Deconstruct to provide waterproofing design and solutions at Cambridge House. The project encompassed forming new deep Basement excavations, Grade 1 and Grade 2 listed structures requiring significant interventions and all requiring a Grade 3 level of waterproof protection. Newton have been involved from the outset and have provided a first class service to ensure we provide a robust solution to this prestigious project."
– Mark Makinson, Project Director - Deconstruct UK Ltd