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Regulatory requirements were fulfilled and close co-operation between all parties resulted in a successful solution to the challenges Case Study: Lisson Grove, London - EPS Infill to Road Bridge Arches
encountered on this particular site.

We were able to provide high quality industry leading technical assistance which allowed for a turnkey, cost effective, yet fully compliant Gas
protection solution, delivered in close co-operation with the main contractor and groundworker, thereby achieving tight deadlines to keep the
project on programme and on budget.

Project: Supply & install EPS wrapped blocks to three road bridge arches in London.

Client: F M Conway

Summary: The encapsulation of Expanded Polystyrene blocks with a hydrocarbon resistant membrane inside a
three arched road bridge.

• The installation of Landflex 100ES to the floor and walls of the arches to 1.2m below soffit.
• Installation of Landflex 100ES welded to the wall section to ensure total encapsulation of EPS
blocks
• Total encapsulation of individual EPS blocks in our factory to enable completion of the final 1.2metres
Above left: Independent air lance integrity testing to installed Landlfex ZR60 gas membrane
Above right: Independent tracer gas testing of first block in accordance with local authority requirements Challenges: Working in restricted areas with limited space. The challenge was to provide a solution to the completion of the
EPS installation without compromising risk to the contractor or installation teams.

Our Solution: Our Landflex 100ES material is a chemically resistant flexible membrane and the preferred choice for this project
due to its chemical resistances, tensile strength and flexibility. It’s designed for longevity in challenging
environments.
The road bridge at Lisson Grove is expected to settle by 10mm, exerting pressure on the EPS installation. The
combination of lightweight EPS blocks and the chemical resistance of our Landflex 100ES will ensure the integrity
of the project for the future.

The installation comprised 296 individually wrapped EPS blocks, pre-wrapped off site in our Billericay factory;
utilising a total of around 5,800m of material. Each block measured 2.4m x 1.22m x 600mm and the whole
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project was completed in 38 days (22 days manufacturing, 16 days on site).

Page 26 Case Studies: Gas Membrane