Who we are

Anchored in Switzerland and internationally active, WALO is managed as a family business in the 4th and 5th generation. For over 100 years, WALO has focused on the combination of consistency and innovation.


What we do

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



We have successfully implemented many challenging projects. Therefore, we proudly let our references speak for our work.



Whether residential, industrial, healthcare, outdoor or for sports and leisure facilities - seamless floor coverings have to meet a wide variety of requirements on a permanent basis.



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


Hornberg Reservoir, Germany

WALO specializes in steep slope projects, using Dense Asphaltic Concrete (DAC) mix designed for quick installation and durability. Learn how they rehabilitated a 40-year-old reservoir slope with only 40% of the surface needing rehabilitation measures.

Case Study Description

The existing asphalt lining of the upper reservoir, installed 40 years ago, was showing signs of ageing in the slopes facing the sun while the upper part of the slope was vulnerable to the stresses of the constantly changing water level.


The sides of the reservoir have a slope inclination of 1:1.6, creating a very challenging working environment. This is WALO’s particular area of expertise as the company has specialist machinery and equipment developed specifically to operate on very steep slopes. The Dense Asphaltic Concrete (DAC) mix that WALO used for lining the slopes for this project is also specially designed for use on very steep inclines such as these, being quick to lay, very strong, flexible and stable.


WALO milled off 40mm from the upper part of the slope and replaced it with a new DAC layer, which benefited from the addition of polymer-modified bitumen. The other parts of the slope were treated locally and reinstated as required. In total, only 40% of the slope surface needed rehabilitation measures after 40 years of use. Finally the complete slope was sealed by a sand-mastic coat. The base was resealed by both sediments contained in bunded areas and in part new conventional mastic coat. In addition, the joint construction to the bottom outlet and around the outlet tower, were also replaced.


2700 Corporate Dr, Suite 200
35242 Birmingham AL
United States


Asphalt Hydraulic Engineering

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