South Lodge Hotel & Spa, Horsham

An exclusive, state of the art Spa in Sussex required a comprehensive below ground waterproofing solution.

The Challenge

South Lodge is a stunning hotel in Horsham, with breath taking views over the South Downs, award winning dining and beautiful facilities for hosting weddings and family occasions. Waterproofing Specialists Cast Contracting Ltd (CCL) were approached by the main contractor to supply and install a structural waterproofing system into the brand new £15m spa complex designed by Felce & Guy Architects, which boasts 14 nature themed therapy rooms, juniper infused sauna and the UK’s first heated natural swimming pool.

South Lodge Spa

The Solution

CCL installed RIW’s Structureseal Sodium Bentonite pre-applied waterproof membrane to the vertical concrete secant piles and blindings, prior to others forming reinforced concrete retaining walls and basement floor slabs into the new spa complex.

RIW Flexiseal Pro liquid applied system was post applied via specialist airless spray pumps to the external face of other (non-piled) retaining walls.

Finally, RIW’s Double Drain drainage/ protection sheet was installed to provide protection during backfilling operations and to promote the drainage of water away from the structure to the perforated land drainage channel.The comprehensive below ground solution was completed to a very tight time frame, with CCL successfully overcoming difficult wet site conditions during winter months.

Client Testimonial

“CCL successfully met the challenge of what was a multi visit installation sequence to install the pre-applied Type A membrane. The ability to spray apply liquid coatings to large areas meant that we could take advantage of the short, dry breaks in the weather.”

Jim Langdon, Contracts Manager, Cast Contracting Ltd

Products Specified

  • RIW Structureseal
  • RIW Sheetseal 226
  • RIW Flexiseal Pro
  • RIW Doubledrain
  • RIW Structureseal sealing compound/Granules

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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