St Georges Hill, Weybridge
This substantial new build property was being constructed with a full earth retaining basement area under the main house. Our design requirements were to protect the basement of this valuable property with a waterproofing system that would meet with BS8102:2009 requirements and provide a long term guarantee. As it was not possible to accurately determine the amount of potential water pressure around the building our system was designed to expect a full head of water pressure against the structure.
The design was carried out by one of our CSSW qualified surveyors, along with the builders design team. It was decided to use a complete waterproofing system , Type A externally resistant, Type B integrally waterproof and a Type C maintainable cavity drain system were incorporated in the design.
Externally – Newton Hydrobond was laid to the builders blinding under the slab, this membrane bonds directly to the slab as the slab is poured forming a continuous self repairing membrane. Newton waterbars were used in the construction of the concrete slab and walls making the structure integrally waterproof. Once the reinforced concrete walls were completed and cured they were prepared and Hydrobond 108 was applied to the surface forming a continuous rubber skin around the basement level of the building.
Internally – Newton 508 cavity drain membrane was applied to all internal walls with 50mm closed cell insulation being laid to the slab with 508 membrane laid over, all linked with the basedrain which is linked to the sump chambers.
We were able to provide a design and installation to provide the client with a long-term robust and guaranteed waterproofing solution.
Type A (Hydrobond) waterproofing being applied to sub-site
External liquid membrane applied to wall surfaces
Part of completed project with car park turntable