The Marshall Building, Lincoln’s Inn Fields, London

Waterproofing the London School of Economics.

The Challenge

Cast Contracting Ltd (CCL) were commissioned by Bolt & Heeks Construction to design, supply and install a

In April 2016, the world-renowned London School of Economics announced that Grafton Architects were to design their next major project. The Marshall Building at 44 Lincoln’s Inn Fields includes an extensive two-storey, mixed-use basement that will house plant areas, squash courts, changing facilities and a sports hall, covering a total of over 2,250m2 of floorspace.

Newton Specialist Contractor CCL were appointed to design, supply and install the waterproofing by principal contractor Mace Group in late 2019.

Lincolns Inn Fields

The Solution

To provide a completely dry, guaranteed solution, CCL recommended the Newton CDM System. Otherwise known as Type C waterproofing, the CDM System is the safest and most reliable form of waterproofing.

Prior to installation, CCL applied Newton 906 Lime Inhibitor to the new slab to prevent free lime from the concrete from affecting the drainage membranes. The Type A liquid waterproofing membrane Newton 103-S was also applied internally to many of the concrete surfaces as a barrier to water.

With preparations complete, over 2,250m2 of Newton 520 eco membrane was installed to the floor and over 570m2 of Newton 508 membrane installed to the walls to create the Newton CDM System. A drainage system of Newton Basedrain channels also directs any water captured by the membranes to the point of discharge, and the whole system was sealed with Newton Over Tape.

The Result

Despite requiring dedicated delivery slots, and working to an extremely tight program of work, CCL were praised on the quality and speed of their installation, which was completed well within the time limit.

The Newton recycling service was also a great success, recycling 115 kg of HDPE waste and therefore preventing over 132 kg of CO2 emissions.

Client Testimonial

“The unique closed loop recycling service provided by Newton has bought real benefits to the project.

It has helped us reduce our construction waste and supported our Time to Act campaign to reduce single use plastic waste across construction, all with no impact on site activities.”

Alice Ashpitel, Sustainability Manager, Mace Group

Products Specified

A liquid-applied, Type A waterproofing membrane with high adhesion that is capable of resisting extremely high water pressure and can be quickly applied in just one coat.

The most reliable waterproofing solution for any space below ground, the Newton CDM System combines decades of experience with the highest quality, BBA certified membranes from Newton System 500, bespoke sump and pump configurations, back-up systems, telemetry, and ancillaries.

BBA certified, high quality cavity drain membranes as part of the CDM System, manufactured from 100% recycled HDPE.

520 eco
BBA certified, 100% recycled, 20mm cavity drain membrane that is ideal for basement floors as part of the Newton CDM System.

A range of products that are critically important to the installation of the Newton CDM System, including plugs, tapes, and seals.

A drainage system that receives and drains water from the cavity drain membranes and directs it to the point of discharge.

Applied to concrete surfaces prior to the installation of a Newton CDM System to prevent the ‘leaching’ of free lime from the concrete

Design | Supply | Installation

Cast Contracting Ltd (CCL) is the UK’s leading specialist in Design and Installation of all Waterproofing, Tanking and Ground Gas Systems across the United Kingdom. CCL prides itself on offering the highest level of service throughout the Design, Planning, and Installation process.

Structural Waterproofing & Ground Gas Solutions

CCL’s in-house design team can offer a comprehensive proposal for all scenarios in line with BS:8102 and BS:8485.

CCL Guarantees

One of the most comprehensive Guarantees across the industry, taking full project ownership.


Cast Contracting Limited is one of the longest standing industry specialists. As it is now part of the CCL Group of Companies, Cast Contracting Ltd has the additional stability and support with over sixty employees across the Group.

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