CCL Refurbishment hero


Since CCL started trading in 1997, a core part of its business has been designing the waterproofing for refurbishment developments, in line with BS 8102. CCL can offer a bespoke design for the Structural Waterproofing Strategy, tailored to the project’s requirements.

Cast Contracting Ltd (CCL) specialise in the design, supply, and installation of waterproofing and ground gas systems, specifically for refurbishment projects.

CCL has had the privilege to work on countless high-profile projects throughout the United Kingdom and Europe; working on buildings and structures such as The Royal Opera House, Centre Parcs and Twickenham Stadium to name a few refurbishment projects.

Planning and Design

An integral part of CCL’s business has been working on planning and designing of refurbishment developments alongside Architects, Principal Contractors and Design & Build Sub-Contractors; providing them with their desired goals without compromising on the quality at any point. Given the inevitable unknown nature of refurbishment developments, CCL would be happy to undertake site surveys to better understand the project requirements, at any part of the design process.


As CCL is an approved applicator for all the major waterproofing manufacturers, it can offer a design and/or installation for every project scenario.

Within refurbishment scenarios, the external elevations of the structure are typically inaccessible, meaning the waterproofing strategy can only be achieved internally.

In such scenarios, CCL could put forward a Type C form of waterproofing in BS8102, being a Water Management System.

This system works by allowing the ingress of Ground Water into the structure but manages its path to a predesigned Pumping Station or a suitable discharge point.

In line with BS8102, a Type C form of waterproofing would be able to achieve a Grade 3 environment, meaning no water ingress is acceptable.

Specialist Works

As an alternative to a Water Management System, a Specialist Cementitious coating can be applied internally, which can withstand Hydrostatic Pressure from external ground water. Hydrostatic Pressure is the force of external ground water bearing against the structure. CCL would design the Waterproofing Strategy based on the individual project requirements and project restraints.

As well as Structural Waterproofing in refurbishment scenarios, CCL can offer a wide range of Bunded Waterproofing Solutions including Water Retainment Structures, Carpark Coatings and Trafficable Plant Room Coatings, all designed and installed to the highest quality.

Latest Projects

The Marshall Building, London

British Museum

The British Museum, London

St John at Hackney

St John’s Gardens, Hackney

Oxford Student Castle

Student Castle, Oxford

South Lodge Spa

South Lodge Hotel & Spa, Horsham

Sky Central

Sky Central

Sidney Sussex College

Sidney Sussex College Cambridge University

Royal Opera House

Royal Opera House Covent Garden

Paterson Building

Paterson Building, Manchester

CCL’s areas of expertise include:

  • Design only schemes
  • Internal basement waterproofing
  • External basement waterproofing
  • Podium waterproofing
  • Movement Joints
  • Concrete repair
  • Trafficable coatings
  • Carpark coatings
  • Water-management systems
  • Cementitious coatings
  • Injection systems
  • Pumping systems

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.

Our Services:

Working throughout the UK, CCL takes pride in offering the highest level of service with every major manufacturer across the sector.


Basement Waterproofing

Podiums / Terraces / Balconies

Ground Gas Membranes

Trafficable Coatings

Water Management System

External Membranes

Concrete Repair

Customer Success Stories

friars walk logo

★ ★ ★ ★ ★

Friars Walk

“The CCL team were incredibly conscientious and provided a 24-hour installation service to ensure our strict schedules were achieved. The team on site were very helpful and were able to provide solutions to overcome any problems encountered during the construction of the site. Nothing was too much trouble.”

Lee Lovering, Construction Manager, Bowmer and Kirkland

★ ★ ★ ★ ★

Royal Opera House

“Cast Contracting’s waterproofing expertise ensured that all of the critical waterproofing works carried out at The Royal Opera House were to the highest professional standard. The helpful and proactive team of applicators were able to deliver the waterproofing works to our strict installation programme whilst achieving a high quality of workmanship.”

Tom Ogden, Site Manager, Careys PLC

★ ★ ★ ★ ★

Grosvenor House

“Grosvenor House was a complex domestic build located on a site that was very wet. The subterranean ground conditions were running sand and a potential ground water pressure of 5 tonnes per square metre expected to the RC basement structure. With this in mind we needed to have complete confidence in the company who would be providing the water proofing solutions, which we found in CCL. From their initial proposals all the way through to completion they were professional, helpful, thorough and cost effective. It is imperative as a luxury house building company that you have a watertight structure below ground. Due to the CCL solutions and implementation, there have been no such issues that have arisen since completion and that is invaluable.”

Craig Riley, Contracts Manager, Charybdis Developments Ltd

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