The Solution

Arti Structural Waterproofing and Newton worked with the British Museum, main contractor and Nex Architecture to propose a system that met all of the requirements for waterproofing and fireproofing a Grade I Listed building.

After ensuring that the walls and floors were clean and well prepared, HydroCoat 107 Elastic 2K was installed as the primary Type A barrier waterproofing. The flexible, cement-based membrane provided a robust coating to seal existing leaks in places where a Type C system was not feasible.

Next, Oldroyd Xtf membrane provided a full Type C cavity drain membrane system to the walls and floor of the tunnels. Type C systems are widely accepted in listed structures as they are reversible and require minimal fixings to the substrate.

CDM 520 eco Floor was also used beneath the floor build up to deliver maximum drainage capacity to the pump system.

Oldroyd Fireproof Membrane

Oldroyd Xtf is the number one sustainable fireproof and waterproof solution for underground projects. Produced in Norway by specialist manufacturer Oldroyd, it contains only environmentally friendly raw materials and is thoroughly tested in challenging Norwegian and Faroese tunnels.

Oldroyd Xtf membrane is tested according to the EN 13501 standard for ‘Fire classification of construction products and building elements – Part 1: Classification using data from reaction to fire tests’.

As a result, the membrane is classified to B-s2.d0, meaning it completely prevents burning droplets when exposed to fire. Watch Newton’s Xtf fire testing videos for more information.

Oldroyd are specialist UK product partners with Newton Waterproofing Systems, and the Oldroyd Xtf membrane is distributed exclusively in the UK via Newton.