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.


Wag Reservoir, Austria

Learn how WALO overcame the challenges of modernizing a remote reservoir in Austria with their innovative solutions and cutting-edge technology in just six months.

Case Study Description

The upper reservoir at Wag, which also serves as an equalizing reservoir, was constructed during the 1950s in a limestone area in an extremely remote part of Austria, roughly equidistant from Salzburg, Vienna and Graz. After operating for 50 years, an investigation revealed severe deformation in the base of the reservoir, owing to erosion of the limestone in the surrounding ground. Subsequent to the construction of the original reservoir in the 1950s, the technical requirements in Austria for large reservoirs had changed, meaning that the monitoring system needed updating. As a result the reservoir required complete modernization of the lining system, as well as a total renewal of the drainage and drainage monitoring system and the concrete structures.


The location is very remote, being at least two hours drive from any major towns. To add to this challenge, the construction work also needed to be carried out as quickly as possible. The weather in the region added to the complications, being notoriously wet with rainfall on over half the days of the year.


The new construction also needed to be more suitable for the limestone geology of the area and to be dense enough to last for generations to come. WALO’s Dense Asphaltic Concrete (DAC) is particularly suitable for a limestone landscape like this, being extremely impermeable but also flexible and incredibly strong. WALO had two lining groups operating at the site six days per week, which reduced the construction time to just six months over one summer season, rather than taking two summers, which cut costs. WALO also installed a 240 tons per hour asphalt mixing plant at the site which meant that no time was lost transporting asphalt to the site from an off-site plant and the teams could be flexible and respond swiftly to any changes in the weather. WALO’s competitors had not considered installing a plant on-site like this and would have transported the asphalt into the site from a considerable distance, which would have added a significant amount of time and money to the project. A control gallery was installed by WALO and the existing single layer liner on a 24 m long slope with an incline of 1:1.75 was upgraded into a controlled (double lined) sealing system. The narrow, leakage tunnel which had provided access to the reservoir was replaced by two ramps.


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35242 Birmingham AL
United States


Asphalt Hydraulic Engineering

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