Granite® HDXtreme gives a La Rochelle port building a new look and new life

Harbours are an extreme environment for any building material. But when the building site is located on a stopover pier in the middle of the harbour, a very special material is required to withstand the corrosive marine atmosphere. It’s exactly the type of place ArcelorMittal Europe – Flat Products’ Granite® HDXtreme is designed for.

Detailed information

When the Port of La Rochelle decided to renovate the existing Hangar H12 on the pier, Granite® HDXtreme was the logical choice for the new roofing and cladding. The high-quality Nerba 6.25.1085B facade and Nertoit 3.45.1000T roof profiles were developed by SPO (Société Profilage Ouest) and installed by ProAcier. The refurbished building is now a beacon in the harbour and a valuable asset for the port authority.

“The client’s main objective was to find a material with a guarantee of at least 10 years in this maritime climate,” explains Pierre-Matthieu Rivollier, Purchasing Manager for SPO. “We proposed Granite® HDXtreme due to the location. A key decision factor for the client was the 75 µm paint coating.”

“When SPO presented Granite® HDXtreme to us, we were won over by the quality and durability of this organic coated steel,” notes Maud Thomelet, Land and Real Estate Manager for the La Rochelle Port Authority. “It is ideal for a building that is located just 20 metres from the sea.”

The existing Hangar H12 building on the stopover pier had been very damaged by time and by the C5 marine environment, requiring major work. Maud Thomelet explains: “The building had an asbestos roof which had to be removed by a specialist company. The building’s frame also needed to be reinforced before the new roofing and cladding from SPO could be installed.”

Colour challenge accepted!

The colours were chosen by the new tenant for H12 – a company which is renting the space to store soybean meal, flour, and pellets which are used in animal feed. In addition to pure white (G910), the client specified anthracite grey (G716) for the long sides of the hangar. The gable ends are clad in zinc yellow (RAL 1018) and the grey.

“Yellow and black are associated with the city of La Rochelle – and particularly with the local rugby team, winner of the European Cup in 2022 and 2023,” notes Pierre-Matthieu Rivollier. “The yellow is not a standard Granite® HDXtreme colour, so ArcelorMittal had to colour-match it in order to be able to provide the exact shade required.”

Advice and support at every stage

Another key factor for SPO is the support that ArcelorMittal provides. “Whenever we have a question we ask our client support contact at ArcelorMittal and we always get a prompt answer,” says Pierre-Matthieu Rivollier. “Whether we need fire behaviour information, declarations of performance, or advice on material selection, we always get a fast answer from the ArcelorMittal team. That doesn’t always happen with other suppliers.”

Proven solution in marine environments

Would the Port of La Rochelle use Granite® HDXtreme again? “We are very satisfied with the quality of Granite® HDXtreme,” says Maud Thomelet. “We will definitely specify it again in future renovations on sites in saline environments.”

For SPO there is no doubt either. “This is not the first time we have used Granite® HDXtreme in a marine location,” notes Pierre-Matthieu Rivollier. “We also provide roofing and cladding solutions for new builds and renovations in France’s overseas territories. Many of these buildings are located on islands. Granite® HDXtreme is a proven solution for us.”

Project information

  • 2023
  • La Rochelle
  • France
  • Investor:
    Port of La Rochelle
  • Facade & roofing manufacturer:
    SPO (Société Profilage Ouest) - Groupe Acoma
  • Facade & roofing installer:
  • Text:
    ArcelorMittal Europe Communications
  • Images:
    UMLR La Rochelle Maritime Association