Loire Arena: High performance acoustic and thermal insulation thanks to ArcelorMittal solutions

Detailed information

Unique in its size and flexibility in the French department of Maine-et-Loire, the Loire Arena was officially inaugurated in June 2013 with the 34th European Women's Basketball Championship organised by the International Basketball Federation and is the new venue for cultural and sports events in the region.

In March 2011, the architectural firm Bernard Chinours from Perigeux was awarded the design of this multi-purpose event centre. Its architectural concept is the result of a thorough analysis of the geographical data and the history of the town of Trélazé, which was once famous for its slate extraction guaranteeing the supply of the whole country.

The Loire Arena refers to this history: On the one hand, its location in a former 4.5 ha slate quarry; on the other hand, the colour of the building itself with its black facade.

The highly flexible venue offers a surface of 10 942 m² on five levels for sport events and competitions with seating for more than 5000 people, large shows for up to 6500 specators, including 3700 seats and 80 places for disabled visitors, and corporate events for around 1000 guests. The flexible stand system offers three different combinations and can be adapted according to the requirements of each event.

GlobalRoof and GlobalWall solutions by ArcelorMittal

For roofing and facades, the architect chose ArcelorMittal Construction's GlobalRoof and GlobalWall systems that fully comply with the building's special requirements for acoustic and thermal insulation. These roof and wall solutions have been specifically developed for buildings of this kind and can be adapted individually to achieve the best performance and cope with the technical constraints of the project.

The roof system selected for the Loire Arena is the complex double and triple skin solution CIN 325 from ArcelorMittal Construction.

An aesthetic solution with noise isolation

GlobalRoof CIN 325 is a waterproof roof system that guarantees exceptional noise isolation, providing an aesthetic solution due to the absence of exposed fasteners of the insulation on the underside at the same time. It consists of perforated Hacierco® liner trays (galvanised, prepainted steel profiles) as the inner skin, various layer of insulation, and Hacierco® 40 SR steel deck. This complete system achieves a high sound reduction index and prevents any noise disturbance of the neighbourhood at sports or entertainment events and concerts.

Moreover, the GlobalRoof CIN 325 P system improves the venue's interior acoustic comfort due to the use of perforated Hacierco® trays for the inner skin. The reverberation time is reduced, which limits the echo effect to ensure excellent intelligibility and a homogeneous sound field.
 
Sound reduction index Rw (C , Ctr) = 55 (-2 , 8) dB
Sound absorption coefficient w = 0.90 Alpha
Surface coefficient of heat transfer Up = 0.20 w / m 2 K

The building's black facade is made with ArcelorMittal Construction's GobalWall system guaranteeing optimum acoustic and thermal insulation. The system's outer skin consists of matt black prepainted steel sheets in the colour Blackberry from the Naturel coating system from ArcelorMittal Construction's Colorissime colour range.