• Who we are
  • What we do
  • Projects
  • Career
  • Contact
  • Who we are
  • What we do
  • Projects
  • Career
  • Contact
Back

Who we are

Operating internationally with Swiss roots, WALO is a family-owned business now being led by the fifth generation. For over 100 years, WALO has been committed to the combination of consistency and innovation.


Overview
Back

What we do

WALO is active as an innovative total solutions company in all markets of the construction industry. With its decades of experience and the permanent development of sustainable as well as economical solutions, the family-owned company has established itself as a reliable partner in the construction industry and infrastructure projects in Switzerland and worldwide.


Overview
Back

Projects

We have successfully implemented many challenging projects and are proud to let our references speak for our work.


Overview
Back

Career

Good construction and thus satisfied customers require precise work. All our employees, from unskilled workers to engineers, play a key role in ensuring that we achieve this goal time and time again.


Overview
Back

Contact

With our locations in three countries, we are by your side worldwide.


Contact form

Westmill Landfill, United Kingdom

Learn how WALO UK constructed the largest cell at the Westmill Landfill site in just seven weeks using Dense Asphaltic Concrete (DAC) to create an impermeable liner for complete containment of landfill waste.

Case Study Description

The Westmill Landfill site is located to the north west of Ware, Hertfordshire, UK and is operated by Biffa Waste Services Ltd. The landfill site located in a working sand and gravel pit and receives municipal waste from the south east region of the UK. This is mainly waste from households and businesses, together with some construction industry waste. The 38ha site is located on a chalk aquifer and so environmental considerations are of the utmost importance. Biffa chose Dense Asphaltic Concrete (DAC) as the  lining system for the site as it is the most robust and reliable system available. WALO’s Dense Asphaltic Concrete (DAC) is impermeable to Ieachate and methane so ideal for complete containment of all materials that need to be impounded, such as landfill waste. Since 2003, WALO has constructed 11 cells on the site using DAC with an overall capacity of around 2.5 million cubic meters.

 

The largest and 11th cell was constructed during the summer of 2014. This cell, which was lined with over 13.000 tonnes of asphalt, consists of a basal surface area of 18,400 sq. m. with slopes of 9300 sq. m. The longest slope length lined measures 60 m with an incline of 1:2. WALO UK also constructed intercell bunds into adjacent existing asphalt lined cells. These bunds measure two meters high and cover an area of 3,600 sq.m., again with a slope incline of 1:2.

 

The lining system itself was formulated in WALO’s Zurich laboratory to a design mix specific to this project. It comprised a 300mm mineral attenuation layer, a 200mm sub-base material layer, a 60mm asphaltic binder layer, a 80mm DAC layer and a mastic seal coat to the base, side slopes and bund areas. The asphalt was placed by hand on the intercell bonds and by paver and winch on the base and slopes. Once the lining works were completed, a Ieachate collection and removal system was installed. The project was scheduled to be completed within a ten week period, but was actually completed in just seven weeks.

Special Features

Read more on the Westmill Lining Project on the Envirotec Magazine article.

walo-us-project-westmill-landfill-02
walo-us-project-westmill-landfill-03
walo-us-project-westmill-landfill-04
walo-us-project-westmill-landfill-05
Contact

WALO UK LIMITED
29 Weeping Cross
Stafford, ST17 0DG
Great Britain

Location
United Kingdom
Service
Building time
2003 - 2017
Share page
placeholder_hero_3

Contact us

We appreciate your interest in the WALO Group and will be happy to answer your questions.

Walo Bertschinger AG

Headquarters
Giessenstrasse 5
Postfach, 8953 Dietikon 1

© 2024 Walo Bertschinger. All rights reserved.