At NordicSub, we are constantly working to develop our business and offer more professional solutions to our customers. That’s why we are now expanding our services to include patio cleaning, roof cleaning, facade cleaning, algae treatment and pressure washing in collaboration with our specialised division, NordicHøjtryk.
This expansion is a natural part of our development. We already have modern, specialised equipment and many years of experience in professional cleaning, technical solutions and maintenance. That’s why we can now also offer professional solutions for cleaning outdoor areas for both private and commercial customers.
Professional patio cleaning creates attractive and safe outdoor areas
Many homeowners find that, over time, their paving becomes covered with moss, algae, dirt and dark deposits. This not only affects the appearance, but can also make the paving slippery and unsafe.
With professional patio cleaning, your paving can come back to life. We use efficient high-pressure machines and environmentally friendly products to ensure a great, long-lasting result.
Our patio cleaning includes, among other things:
– High-pressure cleaning of paving
– Removal of moss and algae
– Professional algae treatment
– Impregnation/sealing of paving
– Cleaning of patios and driveways
The result is beautiful paving that looks almost like new again.
Roof cleaning and algae treatment protect your roof
A roof is exposed daily to wind, rain, moisture and algae. Over time, this can lead to deposits and damage to the roof.
With professional **roof cleaning and algae treatment for roofs**, we help to:
– Remove algae and dirt
– Extend the roof’s lifespan
– Improve the appearance of your home
– Prevent unnecessary damage
We use gentle methods and professional equipment, ensuring your roof is treated correctly and safely.
We also offer facade cleaning and wooden deck cleaning
At NordicSub and NordicHøjtryk, we also offer:
✔Facade cleaning
✔Wooden deck cleaning
✔Impregnation/sealing
✔Pressure washing
✔Algae treatment
✔Other specialist tasks
We always focus on quality, professional solutions and satisfied customers.
Specialised equipment and many years of experience
One of the reasons we are now expanding our services with patio and roof cleaning is our investment in modern, professional equipment. The combination of specialised machines, effective methods and many years of experience enables us to deliver high-quality results.
We work with private customers, housing associations and businesses throughout Denmark.
Dynamic development and the courage to make strategic decisions are the foundation of success for modern companies. NordicSub proves this once again by officially opening a new division in Greenland. This step not only strengthens the company’s position on the international market, but also meets the growing demand for specialized services in Arctic regions.
Experience That Creates a Competitive Advantage
NordicSub has been present in Greenland since 2021, carrying out underwater construction and diving projects. The foundation of this expansion is many years of experience — including 8 years of operations in Northern Norway, where the team developed unique know-how in marine construction under demanding Arctic conditions.
Local Presence – Increased Efficiency
Until now, NordicSub has carried out projects in Greenland from its base in Denmark. Establishing a local division means:
*faster response times for clients
*greater operational flexibility
*reduced logistical costs
*closer cooperation with local partners
This strategic move significantly strengthens the company’s competitiveness in the region.
Wide Range of Underwater Services
The new Greenland division offers a comprehensive range of services, including:
*harbor renovations – above and below water
* installation and replacement of corrosion protection systems
* timber, steel, and concrete works
* construction of new ports and quay facilities
* inspection of vessels and harbor structures
* seabed surveys and multibeam inspections
* ROV inspections and operations
* underwater pipeline and cable installation
* assistance with underwater blasting operations
* diving operations at power plants and water supply facilities
The company also acts as a technical sparring partner for consultants and project developers.
Modern Technological Setup
In the near future, NordicSub plans to further strengthen its presence with advanced underwater equipment and a 32-meter work vessel equipped with:
*cabins for crew and partners
* separate office facilities
* 100 m³ cargo hold
* large deck area
* two cranes
* complete surface-supplied diving systems
* equipment for all types of underwater operations
* oil spill recovery and emergency response system
Proven Projects in Greenland
NordicSub has already completed a number of impressive projects, including:
* construction of approximately 130 meters of new quay frontage in Maniitsoq
* establishment of new quay facilities in Qassimiut and Saatutt
* renovation and integration of quay structures in Kullorsuaq
* projects in Ilulissat, Nuussuaq, and several other locations
* extensive harbor renovations in Disko Bay (including Aasiaat, Qeqertarsuaq, and Ilulissat)
These projects highlight the company’s ability to execute complex operations under extreme conditions.
Conclusion – An Investment in the Future
The opening of NordicSub’s division in Greenland is not merely an expansion, but a strategic investment in the future. With local presence, advanced technology, and extensive experience, the company is positioning itself as a leading player in underwater operations in the Arctic.
This is a strong example of a well-planned expansion strategy that combines expertise, innovation, and a global perspective.
Seabed Inspection in Denmark – Professional Underwater Inspection from Nordic Sub
At Nordic Sub, we offer professional seabed inspection in Denmark for use in marine projects such as port construction, underwater structures, aquaculture, and maintenance of underwater infrastructure.
We work efficiently in ports, coastal areas, and at fish farms (offshore aquaculture) across Denmark, delivering precise data that ensures a solid foundation for any project.
What does a seabed inspection involve?
A thorough seabed inspection in Denmark is essential for safe planning and operations—both in construction projects and in aquaculture and fish farming.
It is typically used in connection with:
– Port construction and renovation
– Installation of marine structures
– Inspection of existing facilities
– Operation and monitoring of fish farms (offshore aquaculture)
– Maintenance and safety assessments
We analyze, among other things:
– Seabed stability and structure
– Sediment conditions and operational impact
– Erosion and accumulation beneath installations
– Damage, obstacles, and environmental impact
– Condition of installations and structures
Underwater Inspection for Aquaculture and Fish Farming
At Nordic Sub, we have experience with underwater inspection of fish farms in Denmark, where precision and regular monitoring are crucial.
We assist with:
– Inspection of the seabed beneath net cages
– Monitoring of accumulation and environmental conditions
– Documentation for authorities
– Inspection of moorings and structures
This ensures optimal operations, regulatory compliance, and a better basis for decision-making.
Flexible Diving Solutions for Danish Projects
We operate with our own mobile diving setup, making us flexible and independent. This allows us to respond quickly to both port projects and fish farms throughout Denmark.
We specialize in:
– Seabed inspection in Danish ports
– Underwater work in coastal areas
– Inspection of fish farms and aquaculture facilities
– Marine projects in Denmark
– Efficient and safe diving operations
Nordic Sub – Your Partner for Seabed Inspection in Denmark
When you choose Nordic Sub, you gain an experienced partner in professional diving, seabed inspection, and underwater inspection in Denmark—both for construction projects and aquaculture.
We deliver precise data beneath the surface—so your projects and installations stand strong above the water.
Corrosion Protection in Water Tanks – Professional Installation of Anodes by Commercial Divers
At Nordic Sub, we recently completed a specialized project involving corrosion protection in a water tank connected to a test tower. The purpose of the project was to protect and extend the lifespan of the steel structure, which is constantly exposed to an aggressive water environment.
Effective Protection Against Corrosion
Steel structures in water environments are particularly vulnerable to rust and deterioration. That is why cathodic protection using anodes is one of the most effective solutions.
In this project, our experienced commercial divers installed anodes directly onto the steel structure inside the water tank.
The anodes work by attracting corrosion, ensuring that the structure itself remains intact. This method provides long-term protection and reduces the need for future maintenance.
Professional Diving Operations
Our team at Nordic Sub has extensive experience with complex underwater operations and always works with a strong focus on safety, quality, and precision.
The project included:
* Installation of anodes for corrosion protection
* Work in a confined water tank
* Precise mounting on the steel structure
* Documentation of completed work
Extend the Lifespan of Steel Structures
When corrosion protection is carried out correctly, the lifespan of steel structures can be significantly extended. In this project, the test tower structure was effectively protected against future corrosion, providing both technical and financial benefits.
Nordic Sub – Specialists in Underwater Operations
At Nordic Sub, we offer professional solutions in:
* Corrosion protection
* Cathodic protection using anodes
* Underwater inspections
* Installation and maintenance of marine structures
Contact us to learn how we can help protect and extend the lifespan of your installations.
Inspection of Gas Pipes on a Vessel in Odense Harbour – Rapid Response to Suspected Contamination
In the maritime environment, there is no room for risk. Any suspicion of contamination in a gas piping system requires immediate and professional action. During an assignment in Odense Harbour, we were called in to carry out a specialized pipe inspection onboard a vessel where contamination in the gas pipes was suspected.
Why Is Rapid Pipe Inspection Critical?
Gas installations on vessels – including systems connected to gas tanks – must comply with the highest safety standards. Even minor impurities inside the pipes can result in:
* Disruptions in gas flow
* Pressure drops within the system
* Risk of damage to valves and components
* Increased safety hazards
* Operational downtime and financial losses
Scope of the Inspection Performed
Our pipe inspection included:
✔ Insertion of a specialized inspection camera into the gas pipes
✔ Checking for contamination and deposits
✔ Assessment of the technical condition of the pipelines
✔ Inspection of critical sections of the system
✔ Preparation of full technical documentation
Using modern inspection equipment, we were able to conduct a thorough internal examination without dismantling the installation, thereby minimizing vessel downtime.
Contamination in Gas Pipes – A Real Risk
Contamination in gas systems may result from:
* Internal corrosion
* Residues from maintenance work
* Condensation and process-related deposits
* Particles transported with the gas
Regular pipe inspection ensures early detection of issues and helps prevent serious technical and safety-related consequences.
Documentation – Safety and Compliance
Following completion of the inspection, we prepared detailed documentation, including:
* Video recordings from the inspection
* Technical report on the condition of the gas pipes
* Identification of potential risk areas
* Technical recommendations for further action
Comprehensive documentation is essential for audits, classification inspections, and as assurance for shipowners and operators.
Professional Pipe Inspection in Maritime Environments
We have solid experience performing inspections in port and offshore environments, as well as working with gas installations and gas tanks. We operate efficiently and safely, with a strong focus on quality in every phase – from inspection to final documentation.
When contamination in gas pipes is suspected, swift action is crucial. Professional pipe inspection and thorough documentation form the foundation for safe and stable operations at sea.
At NordicSub, we specialize in survey work, ROV inspections, and maintenance of maritime structures. Our goal is to deliver precise, safe, and durable solutions for bridges, harbor facilities, and other underwater projects. A recent project at Sønderborg Bridge illustrates our approach and technological expertise.
Precise Mapping with Multibeam Using Sonic24
The first step in the project was a thorough survey of the area around the bridge pillars. Using Multibeam with Sonic24, we created detailed maps of the seabed:
– Identification of sediment and surface deposits
– Mapping of depths and underwater structures
– Support for safe planning of further maintenance
This technology ensures accurate data, which is crucial for both safety and efficiency in all maritime projects.
– ROV Inspection for Safe Monitoring
After mapping, our team carried out an ROV inspection. This allows us to inspect hard-to-reach underwater areas without the need for diving:
– Inspection of the bridge pillars and foundations
– Identification of cracks, spalling, and other damage
– Documentation for reporting and planning repairs
ROV technology combines safety with high precision, making it indispensable in modern underwater inspections.
Cleaning of Bridge Pillars
An important part of the project was cleaning the bridge pillars. Our team efficiently removed algae, sediment, and other deposits to ensure:
– Better access for inspection and repairs
– Extended lifespan of the bridge structures
– Reduced risk of further damage
Repair of Concrete Damage
After cleaning, we carried out concrete repairs using modern techniques and materials:
– Repair of cracks and spalling
– Ensuring durable and long-lasting solutions
– Optimization of the bridge’s safety and stability
Why Choose NordicSub?
This project in Sønderborg clearly demonstrates how NordicSub combines advanced technology with practical experience. We deliver solutions that:
– Comply with all safety and quality requirements
– Maximize durability and functionality of maritime structures
– Use technology such as Multibeam with Sonic24 and ROV inspections for precise results
If you want to secure your bridges, harbor facilities, or other underwater structures, NordicSub is your reliable partner for surveys, ROV inspections, pillar cleaning, and concrete repairs.
Contact us today to learn how we can support your next project.
NordicSub – Specialists in harbor renovation and construction of maritime facilities
At NordicSub, we have many years of experience in harbor renovation, renovation, and new construction of quay facilities. We are known for our underwater work, but our competencies extend far beyond that. We offer complete solutions for inspection, maintenance, and contracting work – in Denmark, Greenland, and the rest of the Nordic region.
Harbor renovation requires specialized knowledge
A port facility is exposed to enormous stresses: waves, frost, ice, heavy loads, and daily traffic from ships. Without ongoing maintenance and inspection, even the strongest structures can be weakened. At NordicSub, we combine advanced underwater technology with practical experience, so we can identify and correct problems in time.
We offer, among other things:
🔹 ROV inspections and diving inspections
🔹 Thickness measurement of sheet piles
🔹 Diving work with a focus on repair and new construction
🔹 Installation of anodes
🔹 UHP (Ultra High Pressure) cleaning of structures
🔹 Establishment of sheet pile walls and new quay facilities
🔹 Total renovation of existing ports
Construction projects in Greenland and the Nordic region
We are proud of our participation in projects such as the renovation of Atlantkajen in Maniitsoq – Greenland, where we were part of a larger team that carried out the demolition of the old quay and the establishment of a new, modern sheet pile quay.
Such projects show how we combine specialized underwater work with broad contracting tasks – and deliver results that last for many years to come.
NordicSub – your partner in maritime constructions
Whether it concerns the renovation of an existing port or the construction of a new quay, NordicSub is the right partner. We ensure that projects are carried out safely, efficiently and with the highest quality – even under demanding conditions in the Arctic.
Thickness measurement in Nuuk: Professional work in Greenland’s capital
In Nuuk, the capital of Greenland, our NordicSub team recently completed an extensive project focusing on thickness measurement and inspection of steel structures. The work was carried out under demanding conditions, but the result ensures both long-term durability and high safety for the structures supporting the city’s infrastructure.
Measurement of load-bearing steel structures
A central part of the project was the measurement of load-bearing steel structures. With advanced measuring equipment, we were able to record precise data on the condition of the materials. This allows for the timely detection of any wear, enabling maintenance planning before problems escalate.
Measurements of sheet pile thickness
Measurements of sheet pile thickness were also conducted. Sheet piles play a crucial role in structures that must withstand both water pressure and harsh climatic conditions. By monitoring the thickness, we ensure that the sheet piles continue to meet the requirements and provide the necessary protection.
Inspection of anodes and corrosion protection
Corrosion is a natural challenge for steel in an environment like Greenland. Therefore, we conducted thorough inspections of anodes and remaining corrosion protection. This way, we can confirm that the structures are secured against degradation – and suggest measures if additional protection is needed.
Reporting and action plan
After the project was completed, a detailed report was prepared. Here, we compiled the results and presented a clear action plan for future maintenance. This provides the client with a solid overview and assurance that the structures can last for many years to come.
The project in Nuuk demonstrates the importance of regular thickness measurements, inspections, and documentation. By combining technical precision with professional reporting, we create confidence for our clients – no matter where in the world the work is performed.
Effective Cleaning of Fire Sprinkler Systems at Bispebjerg Hospital
Fire sprinkler systems are a critical part of safety in hospitals, where a reliable water supply can save lives. At Bispebjerg Hospital, NordicSub ApS has conducted professional cleaning of sprinkler systems and tank cleaning to ensure optimal operation and compliance with fire safety standards.
Why cleaning sprinkler systems is necessary
1. Prevention of deposits and biofilm
Sediments and microorganisms can accumulate at the bottom of the tank and restrict water flow, which can affect the sprinkler system’s function during an emergency. Regular fire sprinkler system cleaning prevents this.
2. Preservation of water quality
The water in sprinkler systems must be free of impurities to ensure that nozzles and pipes function correctly. Professional cleaning of sprinkler systems ensures that the system is always ready for use.
3. Compliance with regulations and standards
Tank cleaning in hospitals is often required according to building and fire safety regulations. Lack of maintenance can lead to legal and insurance consequences.
4. Protection of infrastructure
Deposits and corrosion can shorten the lifespan of tanks and lead to costly repairs if not removed regularly. UHP high-pressure cleaning and underwater cleaning of tanks by NordicSub effectively protect the infrastructure.
NordicSub’s approach at Bispebjerg Hospital
Underwater cleaning of tanks without draining them, minimizing operational disruptions.
Diver inspections to detect sediments and early signs of corrosion.
High-pressure (UHP) cleaning for efficient removal of deposits and biofilm.
All work is tailored to sprinkler system maintenance at hospitals.
Benefits for Bispebjerg Hospital
Reliable operation of the sprinkler system in emergencies.
Reduced risk of malfunctions and costly repairs.
Extended lifespan of tanks and pipes.
Ensured compliance with fire safety standards and regulations.
Professional tank cleaning at Bispebjerg Hospital by NordicSub provides peace of mind.
Regular fire sprinkler system cleaning and tank cleaning is an investment in the safety of both patients and staff. The project at Bispebjerg Hospital demonstrates how professional services from NordicSub ensure that the sprinkler system operates optimally when it really matters.
Nordic Sub Deploys – with Our Own Mobile Diving Unit
At Nordic Sub, we’ve strengthened our capacity with a fully equipped, mobile diving container – tailored for professional underwater operations in demanding environments. This enables us to operate even more flexibly and efficiently – no matter where in the Nordics or Arctic the task takes us.
Currently, our container is in use in Greenland, where we are involved in a major reconstruction of a 130-meter quay. Our setup allows for the rapid, safe, and efficient establishment of a complete professional diving base on site.
What does this mean for our clients?
✅ Mobility and fast deployment: We can respond to even the most remote locations with all necessary diving equipment contained in one unit.
✅ Our own equipment, no waiting time: We are not dependent on external suppliers – we bring everything ourselves.
✅ Professional standards: The container includes advanced equipment for diving, communication, heating, and safety – all compliant with current professional commercial diving standards.
✅ Efficiency on site: We minimize downtime and maximize productivity by having everything in one place.
✅ Expertise in demanding environments: Our team is experienced in working under extreme weather conditions and complex logistical frameworks.
With this mobile solution, we are equipped to handle tasks in:
Port construction
Marine construction
Inspection and maintenance
Underwater operations in demanding areas
At Nordic Sub, we combine experience, flexibility, and professional equipment – and we are ready for the next challenge.
Follow our projects and see how we work in some of the Nordics’ most demanding environments.
