P E A C E O F M I N DG U A R A N T E E D

CASE STUDY

Cast Contracting Ltd01256 763100 info@ccl-ltd.net www.ccl-ltd.netLodge Farm Hook Road North Warnborough Hook Hampshire RG29 1HA

Grosvenor House, St Georges HillA structural waterproofing solution was required for an impressive new build basement in WeybridgeCAST CONTRACTING LTD

THE CHALLENGEWaterproofing Specialists Cast Contracting Ltd (CCL) were employed to design, supply and install a complete waterproofing solution to this new build development, suitable for the concrete wall and slab construction of the basement including podium decks.

These channels drained into four sump collection pits which each housed Newton’s twin sump pump systems including battery back-up and high level water alarm. Newton’s 107F cementitious coating was installed to the lift pits and service trenches, external courtyard area and to the top of the concrete roof decks above the basement areas. The area was then protected with Newton 407 deckdrain system, before the finishes were completed and carried out by others.

Finally, to complete the waterproofing works, Newton 508 mesh cavity drain membrane was installed to the concrete walls of the vehicle ramp, prior to others installing a decorative rendered finish.

Grosvenor House is an imposing luxury property built in the private estate of St George’s Hill in Weybridge. It features a large 1000m2 basement below the ground, comprising garage, swimming pool & sauna, gymnasium, cinema, plant/ storage rooms and staff quarters.

THE SOLUTION CCL recommended the installation of a cementitious crystalline coating to all concrete substrates prior to installing a full Newton Water Management system. This consisted of John Newton’s 8mm cavity drainage membrane to the retaining walls and concrete slabs above a 50-100mm thick extruded polyester insulation.

To ensure the system was fully maintainable and to be fully compliant with BS8102 ‘protection of below ground structures from water from the ground, ’ CCL installed a preformed drainage channel to the wall/floor junctions with regular inspection ports.

CASE STUDY

Hammerson House, HampsteadA waterproofing solution was required for a world class residential care home for the Jewish Community in Hampstead

THE CHALLENGE

THE SOLUTION

Hammerson House will be a world class 116 bed residential centre for the elderly Jewish Community in Hampstead. The multi-million pound development will offer holistic, compassionate, respite and end of life care for the residents and their families in a safe, stimulating environment. The building has been designed around the principles of ‘households’ – clusters of

CCL recommended the installation of a Type C ‘water management’ system to comprehensively waterproof the basement of the new care home.Newton Waterproofing Systems was the manufacturer of choice, and CCL employed the use of the 8mm thick N508 membrane to the reinforced concrete retaining walls of the basement. Newton 50mm thick Fibran extruded polystyrene insulation and N508 cavity drain membrane was installed across the entire concrete slab.In addition, Newton’s Basedrain drainage channel was installed around the entire perimeter of the basement including the

bedrooms with supporting facilities on a domestic scale. Waterproofing Specialists Cast Contracting Ltd (CCL) were approached by main contractors Bowmer and Kirkland and P+HS Architects during the planning stages, to help develop a comprehensive waterproofing solution for the extensive basement at Hammerson House.

incorporation of inspection ports, to provide a fully maintainable system. The cavity drain system was serviced by a series of fully comprehensive sump pump systems, each consisting of a primary and back-up pump, high level water alarms and battery back-up system. These would all be controlled by Newton’s advanced control panels to ensure a failsafe system in the event of a power shortage.To complete the watertight solution to the lightwells and lift pits within the basement, Newton’s 107F cementitious waterproof coating was spray applied to the concrete upstands.

Cast Contracting Ltd01256 763100 info@ccl-ltd.net www.ccl-ltd.netLodge Farm Hook Road North Warnborough Hook Hampshire RG29 1HA

PRODUCTSNewton 508

Newton Basedrain

Newton Fibran XPS 500C

Newton 107F

Newton NP400 pumps

Newton CP2 Control panel pro

CLIENT TESTIMONIAL:

“ The specialist team at CCL had thorough knowledge and experience of applying Newton’s waterproofing products and materials, as proposed by P+HS Architects. Their onsite team installed the comprehensive systems to the large basement floor with due diligence. CCL were the right contractor for this project and carried out a first class job”

Simon Green, Senior Site Manager, Bowmer & Kirkland