Dream Works
Spt Works
20254  De  Lijn  De  Haan    Wenduine Tramlijn  R 015
Heat Networks
Cable Works
Dsc 1000 Large
Tunneling Works
20299 001 Mopro – Handelsbeurs 016 031019
Pipeline Works
14054 001 Foremost Immo – Wondelgem Depot010
Cover Annual Global Report 8

Welcome @ Denys

Denys is a multidisciplinary group specialised in water, energy, mobility, architecture, restoration and special techniques. Because of this unique diversification, Denys is a preferred partner for complex building projects and infrastructure work, in Europe, Africa, the Middle East, Canada and South America.


Denys is your dream partner for constructing extraordinary buildings. Our ‘design, construction and maintenance’ approach offers an ideal solution tailored to our clients. The multidisciplinary structure of our organisation also ensures efficient realisation.

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Mobility is a major challenge in today’s world. Denys’ unique experience in areas such as earthworks, tunnelling and stabilisation, together with everyday activities involving road and rail infrastructure allow us to invest fully in new technologies to make our works more efficient and minimise the disruption to traffic.

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Denys began laying major water mains in 1923. Since then, Denys has grown into a leading builder of water, gas and oil pipelines. With exceptional technological know-how and an impressive fleet of machines, Denys currently builds pipelines in Europe, Africa and the Middle East. In future, Denys will also be able to make a difference in other regions of the world.

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Restoration & Renovation

Denys is highly passionate about restoration and renovation. This discipline breathes new life into our magnificent heritage, incorporating the power of the here and now. What started for Denys as restoration using specialist injection techniques has grown into a versatile restoration department with many highly qualified specialists. Denys bridges the gap between tradition and high-tech. We employ the most innovative and sustainable building techniques with the greatest respect for the original character.

We are member of the department "General contractors Heritage restoration", established within the Federation of General Construction Companies (FABA) of the Construction Confederation (www.erfgoedrestauratie.be).

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Denys is a past master of boring tunnels in soils with varying geology, under rivers or global cities using unique tunnelling machines. Our highly driven drilling specialists work in many European and North African soils. With great success! Through our in-depth knowledge of micro- and mid-size tunnelling (just about the most difficult underground discipline) Denys is also the right partner for larger diameters.

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Water works

From Belgium to deepest Africa, Denys not only lays (drinking) water pipes but also constructs entire water supply systems. From pumping stations and water treatment plants to building water towers.

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Nuclear works

With respect for the highest quality standards and impressive expertise and experience, Denys also provides exceptional “water works” such as the design, production, construction and renovation of the most complex cooling water pipes for power plants such as nuclear power plants.

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Cable Works

Relying on an experience of almost 100 years in linear projects over large distances, such as pipeline construction and rail works, Denys has become a specialist in the installation of underground high voltage cables since the last decade. High voltage cables, that used to be built as overhead power lines and disgraced the landscape with their high pylons, are now being built underground using innovative techniques and respecting all regulations regarding safety and environment. Several highly satisfied clients keep on relying on Denys’ professionals offering total solutions.

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District Heating

The development of modern heating networks is a crucial part of making our energy supplies sustainable. Denys designs and builds these heating networks, working on behalf of government authorities, energy companies and industrial customers. By doing so, we are able to control every aspect of the process: problematic substrates, difficult access ways, tight deadlines, etc. We have built up a great deal of experience in this area over recent years and our extensive expertise and knowledge about working with pipes, controlled drilling and microtunnels stands us in good stead.

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Rail Works

The rail network is expanding all the time and Denys is involved in its growth. We have the people, expertise and machines needed to build railways, metro lines and tram tracks, including any civil engineering works required, such as renovating old tunnels, drilling new tunnels and constructing bridges and station buildings. We are known for our efficiency, flawless organisational skills and the smart use of innovative methods.

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Special foundation & injection techniques

Special techniques make life easier, which is why Denys is so well qualified in this area. We specialise in ground stabilisation (nailed walls, compensation grouting, facing and/or underpinning buildings) and concrete repairs and/or concrete spraying of artworks and civil engineering works and tunnels. To do so, we use techniques such as jet-grouting, various low-pressure injection techniques, deep-mixing, micro-piles, ground anchors and shotcrete.

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Dream Works

Denys strives hard for innovation and builds determinedly for the future by inventing and developing new forms of mobility : Underground Container Mover, Tube Cargo Express, TZH (low disruption excavation). We are also totally focused on developing new techniques to improve the daily working conditions of our employees and make them safer, as well as raising our quality to excellence : WallSlotrobot, automatic sandblasting, Friex welding, WRIST, 3D carving robot.

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Oosterweel link : Contract for Partial Project ‘Right Bank’ officially signed

LANTIS, as Client for the Oosterweel link, and the temporary partnership Tijdelijke Maatschap RechterOever COmpleet, abbreviated to TM ROCO, officially signed the contract for the partial project ‘Right Bank of Oosterweel link’. This project was awarded to TM ROCO on 5 January 2021.

DENYS is partner in TM ROCO, together with other Belgian construction companies Besix, Deme, Jan De Nul, Cordeel, Franki Construct, Willemen Infra, Van Laere and BAM-Contractors.


Denys worldwide

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