Student Castle, Oxford

A below ground waterproofing solution was required for Oxford University’s high specification student accommodation.

The Challenge

Oxford University’s Student Castle is a high specification student accommodation project, adjacent to the city’s railway station, comprising 515 bedrooms. The three principal blocks constructed in reinforced concrete, will house student dwellings across six storeys, including flats, one bed, and two bed studios. In addition, the accommodation blocks will each comprise a gym, games area, large private meeting rooms, roof terrace and bike store.

The project design takes inspiration from Oxford’s rich medieval history and will feature courtyards, gardens, cloisters, and colonnades.

Waterproofing Specialists Cast Contracting Ltd (CCL) were commissioned by Winvic Construction to design, supply, and install a Gas Proof DPM Membrane under the ground floor slab of each of the three student accommodation blocks.

Oxford Student Castle

The Solution

CCL’s design team selected the installation of Newton’s 104 Crystalline Coating across the concrete ground beams.

Visqueen’s Eco DPM was applied across sand blindings prior to installation of the insulation, vapour membrane and concrete ground floor slabs.

Once the concrete was formed, CCL terminated the system up to DPC level using Visqueen’s Self

Adhesive membrane (SAM) which was fixed to the cement particle board. All service penetrations were fully sealed with Visqueen’s top hat detail to provide a fully sealed gas tight system in each accommodation block.

Client Testimonial

“The team of operatives from CCL undertook the gas proofing works during multiple visits to site. A successful installation process was achieved thanks to the employment of good quality control sign off procedures, pre site surveys and close communication with the Winvic team onsite throughout the project.”

Francis Cawley, Project Manager, Winvic Construction Ltd

Products Specified

  • Visqueen Eco DPM
  • Newton 104 Crystalline
  • Visqueen SAM (Self-adhesive membrane)
  • Visqueen Top Hats

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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