Offshore wind farm at sunriseAI-generated image

Reference story · Offshore wind

[Offshore wind farm X]

How the foundations for [X] turbines were installed in one short season – and why the schedule held.

Client
[Client Ltd]
Location
[Baltic Sea, Finland]
Our role
Project management
Duration
[2025–2026]

01 · Starting point

[Client] was building a [X MW] offshore wind farm [location]. One season was set aside for installing the foundations – with not a single day to spare.

[Description of the project: what was built, who was involved and what phase the project was in when Nordem joined.]

[Why the client chose Nordem: offshore experience, project management expertise, local presence.]

Installation vessel lifting a monopile on siteAI-generated image
Installation vessel on site. Photo: [photographer], [year]

02 · Challenge

The sea sets the schedule. Project management decides whether we are ready.

Northern sea and mountains, a vessel on the horizonAI-generated image
  1. 01

    Short weather windows

    The installation vessel can only lift when the waves are low enough. [How many working days the season realistically had.]

  2. 02

    [X] suppliers, one schedule

    Foundations, vessels, port logistics and inspections came from different suppliers. [The most critical interfaces.]

  3. 03

    Safety at sea

    [X] people worked offshore at the same time. [How safety was ensured.]

03 · How the turbine is built

From the seabed to the nacelle

Scroll to see how a jacket-founded offshore wind turbine is assembled – part by part, in the order it happens at sea.

Technical drawing of a jacket foundation
  1. Step 01 / 08

    The site

    Before the first lift, we know exactly what the seabed and conditions are like. [Depth and soil conditions.]

  2. Step 02 / 08

    Piles

    Four steel piles are driven into the seabed. They carry the whole structure and transfer wave and wind loads into the ground.

  3. Step 03 / 08

    Jacket

    The jacket is lowered onto the piles. A lattice structure is light but stiff: loads are shared between the legs and the braces.

  4. Step 04 / 08

    Grouted connections

    The legs are grouted to the piles. The connection is the most critical detail of the foundation – and exactly where quality management shows.

  5. Step 05 / 08

    Transition piece

    The transition piece connects the foundation to the tower. The boat landing, ladder and platform serve maintenance for the turbine’s whole life.

  6. Step 06 / 08

    Tower and turbine

    Tower, nacelle and rotor are lifted into place as separate lifts. Every lift needs its own weather window.

  7. Step 07 / 08

    Cabling

    The subsea cable is pulled through the J-tube into the turbine and on to the next one.

  8. Step 08 / 08

    The wind farm

    The same work is repeated for every turbine. [Nordem’s role in the project in one sentence.]

04 · Execution

From contract to handover in [X] months

  1. [Q1 2025]

    Contract

    [Short description]

    Project team planning the scheduleAI-generated image
    [Caption: engineering phase.]
  2. [Q1 2025]

    Seabed surveys

    [Short description]

    Survey vessel deploying equipment at seaAI-generated image
    [Caption: seabed surveys.]
  3. [Q2 2025]

    Fabrication starts

    [Short description]

    Welding a monopile in the fabrication hallAI-generated image
    [Caption: fabrication hall.]
  4. [Q2 2025]

    Port logistics

    [Short description]

    Project managers at a harbourAI-generated image
    [Caption: port logistics.]
  5. [Q3 2025]

    First load-out

    [Short description]

    Loading a transition piece onto the vesselAI-generated image
    [Caption: load-out.]
  6. [Q3 2025]

    First installation

    [Short description]

    Monopile lift on an installation vesselAI-generated image
    [Caption: what is happening in the photo.]
  7. [Q3 2025]

    Transition pieces

    [Short description]

    Technicians bolting a transition piece flangeAI-generated image
    [Caption: transition pieces.]
  8. [Q4 2025]

    Subsea cables

    [Short description]

    Cable-laying vessel from aboveAI-generated image
    [Caption: cable lay.]
  9. [Q4 2025]

    Offshore substation

    [Short description]

    Lifting the offshore substation topsideAI-generated image
    [Caption: substation.]
  10. [Q4 2025]

    Last installation

    [Short description]

    Lifting a blade onto a turbine at seaAI-generated image
    [Caption: turbine installation.]
  11. [Q1 2026]

    Commissioning

    [Short description]

    Technicians checking a control cabinet in the nacelleAI-generated image
    [Caption: commissioning.]
  12. [Q1 2026]

    Handover

    [Short description]

    The finished offshore wind farm at sunsetAI-generated image
    [Caption: the finished wind farm.]

05 · Results

[X]
turbine foundations installed
[X] MW
of new wind capacity
[X] d
[ahead of / on schedule]
[X]
[safety metric]

“[Client quote: what the collaboration meant for the project.]”

[First name Last name], [title], [Client Ltd]