St John’s Gardens, Hackney
A structural waterproofing design
solution was required to the basements
of a new build residential development
in Hackney
The Challenge
CCL Design Services were consulted by JJ Rhatigan to advise on the design of a comprehensive structural waterproofing system to the basement areas and roof decks.
Situated next to the church of St John’s Hackney, the new mixed-use residential development in East London consists of three structures including a four storey building with basement, accommodating 58 mixed dwellings and community facilities.
CCL Design Services were consulted by JJ Rhatigan to advise on the design of a comprehensive structural waterproofing system to the basement areas and roof decks.
Situated next to the church of St John’s Hackney, the new mixed-use residential development in East London consists of three structures including a four storey building with basement, accommodating 58 mixed dwellings and community facilities.
The Solution
For the basements areas of the three residential blocks CCL’s CSSW qualified design team reccommeded the installation of a Type C water management system, including a sump pump system for the automatic removal of water.
SIKA CDM was specified, compromising of an 8mm cavity drain membrane, installed to the concrete retaining walls and floor slab, above a layer of 50mm water resistant extruded polystyrene insulation.
Within the design CCL included the installation of a periphery drainage channel, including regular drainage ports, to ensure the entire system was maintainable.
For the blockwork upstands and concrete roof decks above the basement areas, Sikalastic 1k cementious waterproof coating and protective drainage sheet was specified, to prevent the ingress of water.
Client Testimonial
“Having been let down by another waterproofing contractor, JJ Rhatigan contacted Cast Contracting Ltd late into the project at Hackney Gardens to design and deliver a cavity drain waterproofing solution to very tight timescales.
CCL were able to react to the last minute commission and their team of estimators, contracts management and operatives, were able to design and install the cavity drain solutions into each of the three basements.
Their team could not have been more helpful and their professional approach to delivering the solution ensured that we were still able to meet the deadlines required for completing the project.”
James McHugh, Assistant Project Manager, JJ Rhatigan
Products Specified
- Sika Anti Lime Coating
- Sika Std Cavity Drain Membrane
- Sika Std Cavity Drain Channel
- Sikalastic lk
- Sikadrain 850
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.
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One of the most comprehensive Guarantees across the industry, taking full project ownership.
Heritage
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.