Summary

Newton Specialist Contractor, Garrat's Damp & Timber Ltd, provided waterproofing expertise as part of the refurbishment of a high-end commercial property in the prestigious London Borough of Chelsea, that was experiencing high volumes of water ingress in the basement.

Problem

By performing a flood simulation Garratt’s identified that water was entering via defects in the shop front and pavement light wells, travelling along a concealed steel joist and entering the centre of the basement.

Solution

Externally, Garratt’s recommended the shop front be removed, and worked with main contractor CJS and Newton's technical team to design a bespoke metal bund system to resolve the defects and prevent further water ingress.

The prepared concrete and steel was then treated with HydroCoat 903 Primer and waterproofed with three coats of Newton’s flexible cementitious waterproofing membrane HydroCoat 107 Elastic 2K.

Internally, Garratt’s recommended and installed the failsafe Newton CDM System to provide a comprehensive cavity drain waterproofing solution. This included BBA-certified CDM 508 and CDM 520 eco Floor membranes, and a dedicated Titan-Pro sump chamber for removing water from the basement.

The chamber houses dual CP250 pumps, managed by a Control Panel-Pro pump control unit and supported by Victron battery backup protection for complete peace of mind, even in the event of a power outage.

Result

By working in close cooperation with Newton Waterproofing and the main contractor, Garratt’s delivered a bespoke waterproofing solution that is both sympathetic to the original shop front (which was consequently restored) and also delivers a completely dry, Grade 3 internal environment, as per British Standard 8102.