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2024
London
Project Description
As part of a new residential scheme in London, 120 private dwellings are planned, plus the restoration and re-purposing of a Grade II listed building into a high-spec Leisure Community Hub.
The project is designed to create a place where families choose to live, improving the public realm for the enjoyment of all and celebrating and commemorating the heritage of the area.
The redevelopment of the area includes a 22,000m2 basement in which Sika waterproofing products were specified. At the time of securing the project, this was the biggest basement project in the UK.
Project Requirements
Principle contractor McGee was chosen to undertake the demolition, piling and basement works packages, which included installing and providing a grade 3 waterproofed basement.
This saw the Grade II listed building underpinned and transformed into a high-specification Community Hub including swimming pool facilities in the basement, constructed through top-down.
Grade 3 waterproofing was required throughout the entire project, designed in accordance with BS8102:2022. A completely dry internal space was needed, which meant two forms of waterproofing for the 22,000m2 basement.
Sika was chosen as the preferred waterproofing supplier, working closely with trusted partner McGee from April 2023 on the project.
Project Participants
Principal Contractor: McGee
Designer: EPG
Products:
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Testimonials
Sika Solution
A selection of Sika products were selected in order to provide a suitable solution for the location and for the team to complete their work in the most effective manner. 24,000m2 of SikaProof® A08 and A08+ was utilised on the basement slabs of the project with SikaSwell® applied to all concrete joints.
SikaProof® A+ 08 effectively acts as both a ground gas proof and watertight membrane for the concrete basement box. A FPO sheet membrane for fully bonded below ground waterproofing, SikaProof® A+ 08 is designed for reinforced concrete structures and can be pre- or post-applied.
Offering fast and easy installation, a special hybrid bonding layer on the membrane forms a full and permanent dual bond with the concrete structure. Joints are sealed with cold-applied tapes and the product offers high flexibility and crack-bridging capabilities along with high resistance to water pressure
All concrete was supplied by Tarmac, and, for the project, 13,000m3 of Sika® Watertight Concrete and 12,000m2 of Sika® Cavity Drain was used, with SikaSwell® utilised on all concrete construction joints.
Sika® Watertight Concrete is now the most widely used system of its type in the UK. The product incorporates a range of admixtures to improve its resistance to infiltration and is designed for basements, lift pits, retaining walls and concrete façades.
In addition, 4,500m2 of Sikalastic® 8800 – a two-part, pure polyurea waterproofing and protection membrane - was used on the ground floor podium deck, protecting multiple areas below including, commercial, plant and retail. Finally, Sika Multidur® EB-14 slip resistant, coloured, rigid flooring system was used as a coating for the carpark.
"This project was a great combination of teams working together on a largescale job. Due to the importance of such a high-profile project, two training days were held at the Sika Head Office where over 30 members of the McGee management and site team attended. Working closely together with both McGee, and engaging with designers EPG at design stage, helped provide an excellent solution for the client, speeding up the entire process and making it a straightforward one throughout. " Dean Bradbury, Commercial Manager at Sika
"Sika have been instrumental to both the design and providing of compliant waterproofing products/system for this high-profile project. Working together, McGee, Sika and our design partners at EPG, have delivered a top-quality project for the client. As well as the training days at Sika’s HQ in Welwyn Garden City, the onsite training, assistance and inspections provided by Sika have ensured that works are installed to a high standard throughout. When introduced, the new SikaProof® A+ 08 membrane has increased productivity and quality of works on site, whilst reducing the accidental damage, saving time and money. In my opinion, the biggest positive is that it can be laid and installed in damp conditions meaning lost productivity is greatly reduced in wet weather conditions. I will definitely use this product again " Ben Burgess, Project Engineer, McGee