Waterproofing a Basement Office, London

Summary

Newton Specialist Contractor Arti Construction got involved at an early stage in this new-build project in Golders Green, North West London, to construct an office basement and 4-storey dwelling containing 7 new flats.

The Project

Working alongside Landmark Architecture and Barnard Associates structural engineers, Arti were faced with the challenges of excavating and waterproofing a 330m2 new basement at 3.5 metres deep, while also coping with very restricted site access and a tight timescale

The Solution

Arti Construction have been building, renovating, converting and remodelling properties in London since 2002, so they soon got the site up and running with a 40-tonne piling rig installing 267 secant piles. Once a total of 1,700 cubic metres of earth and clay were removed, the waterproofing could begin.

As a completely dry office environment was required, Arti chose an external Type A system with an integrally waterproofed Type B concrete structure and an internal Type C system. They began with Newton 403 HydroBond beneath the slab and against the secant piles. The Type A solution was completed with the application of a Newton 104 crystalline solution to the tops of the piles, and Newton 314-BG bentonite granules to seal around the pile caps.

To provide a watertight Type B concrete structure, Arti then installed Newton 315 Polymer-Waterbar to all construction joints in the concrete slab and walls.

Once the project was ready for Arti Construction to return to the site, the specialist team installed the maintainable and robust internal Newton CDM System.

The Result

Despite facing many challenges, including a tight timescale, extremely restricted access, and Covid 19 social distancing rules, Arti Construction delivered the impeccable Type A, B & C waterproofing to the agreed project programme.