From ground to finished structure.
Groundworks, water and wastewater, and concrete coordinated as one delivery.
Full-service contractor in concrete works and groundworksPrecision in execution.
Precision in execution.
Confidence in delivery.
We deliver concrete works and groundworks for commercial and infrastructure projects in Oslo and Eastern Norway. We keep our promises and take responsibility for quality, progress and collaboration throughout the project.
About the companyBuilt on experience.
Built on experience.
Geared up for the next chapter.
Nexum Construction builds on the experience of Ringstad Anlegg. “Nexum” means connection and commitment — between ground and structure, client and contractor, and plan and completed project. We believe good projects are created through clear communication, practical solutions and delivery you can rely on.
We take on works contracts for both private and commercial projects — from concrete works to groundworks, excavation, roads, water and wastewater. Our approach is always the same: clear planning, skilled people and close coordination between contractors, suppliers and clients.
We work systematically with health, safety and the environment, with a dedicated HSE/QA manager, established routines and close follow-up on every site.
Water, wastewater & infrastructure
Precise coordination of water, wastewater and technical infrastructure, built for reliable operation over time.
Foundations
Site preparation, foundations and earthmoving — with sound logistics and orderly progress.
Formwork
In-situ concrete structures with control of progress, quality and documentation throughout delivery.
Reinforcement
Formwork and reinforcement are coordinated before concrete placement, making the work precise and verifiable.
Concrete placement
Concrete placement and finishing with control of progress, quality and documentation.
Structural frame
Foundations, walls and slabs, built as one connected structure.
One delivery — from utilities to finished structural frame.
View our projectsOur servicesConcrete works and groundworks.
Concrete works and groundworks.
Accountable from ground to finished structure.
We deliver specialist work from ground to completed structure, with clear communication, predictable progress and solutions that work in practice.
Concrete works
In-situ concrete structures with control of progress, quality and documentation throughout delivery.
- Formwork and reinforcement
- Concrete placement and finishing
- Foundations, walls and slabs
Groundworks and excavation
Site preparation, foundations and earthmoving — with sound logistics and orderly progress.
- Site preparation
- Excavation and soil replacement
- Ground shaping and levelling
Water, wastewater and infrastructure
Precise coordination of water, wastewater and technical infrastructure, built for reliable operation over time.
- Water and wastewater works
- Culverts and manholes
- External services and utilities
Roads and external works
Access roads, sub-base layers and tie-ins to existing infrastructure for robust, functional external works.
- Roadworks and access
- Sub-base and surfacing
- External works
We are hiring
We are looking for skilled workers in concrete and groundworks — and a Project Manager.
How we work
From early involvement to documented delivery
01
Early contractor involvement
We are happy to contribute early with practical assessments of feasibility, sequencing, logistics and interfaces. This enables better decisions before work starts.
02
Clear expectations
We emphasise clear roles, expectations and accountability before mobilisation. It reduces misunderstandings and provides better control of progress and delivery.
03
Well-run delivery
On site, good operations are about planning, order and close coordination. We follow up continuously so deviations are caught early and the project stays on course.
04
Documented quality
Quality must be verifiable. We work systematically with HSE, QA and documentation throughout delivery.
Selected projects
All projectsDocumented experience
Transport infrastructure
Oppegård bru
Concrete works for the new Oppegård bridge. The work is part of a bridge project requiring precise planning, safe execution and coordination with the main contractor and other trades.
Commercial buildings
Youngs gate 2–4
Concrete contract for the renovation and development of Youngs gate 2–4, including in-situ concrete structures, cast-in inserts and fixings, lift pits, site establishment and preliminaries.
Transport infrastructure
Arlien bru
In-situ concrete works for a new bridge over the Gausa river, including foundations, abutments and a bridge deck cast over precast elements.
News
Latest news from Nexum
Updates from the company, our projects and our teams.
Ringstad Anlegg becomes Nexum Construction
Ringstad Anlegg is entering a new chapter as Nexum Construction. The name signals a clearer position as a contractor in concrete works, groundworks, water, wastewater and infrastructure, with a stronger focus on the Oslo market.
Read moreCollaboration makes better projects
We are ready to talk, whether it concerns tender enquiries, collaboration or early-stage planning.
Get in touch