Edilians under-roof tiles and screens contribute to the aesthetics and performance of one of the islands of the ZAC Bastide Niel in Bordeaux

In particular, it uses materials that echo the historic Bordeaux and uses 100% renewable energy.

With 3.500 m² of Diamant Huguenot tiles in silver color on the roof and cladding, as well as 900 Solaire Max tiles from EDILIANS, the B107 block, which will house social housing designed by the Delta Construction/BPM Architectes consortium, meets in all respects the specifications defined by Bordeaux Métropole Aménagement and the MVRDV project management team.

A remarkable building, landmark of the new district

For each block of the ZAC Bastide Niel, the specifications defined by Bordeaux Métropole Aménagement and the MVRDV project management team imposed, among other things, a precise shape of the building envelope, with altimetric points to be respected.

Located on the edge of the ZAC, the project imagined by the Delta Construction / BPM Architectes group extends over a triangular plot exploited to the maximum in order to create within a single building three very distinct entities, separated from each other. in their operation by expansion joints:

• a reception center for R+3 asylum seekers with a capacity of 31 apartments with 1 to 5 rooms,
• a student residence with 52 free-to-use R+7 apartments, from 1 to 3 rooms,
• a R+6 student social residence with 158 rooms, managed by Domofrance.

Complying with the RT2012 -20% standard, the structure with its concave facades is distinguished by its asymmetrical volumetry, one of the highest points of which reaches nearly 40 m in height. The whole thus takes on a remarkable identity which is reinforced by the presence on the roof and facade of EDILIANS silver-coloured Diamond Huguenot terracotta tiles.

A faceted tile that contributes to the unique identity of the island

Among the design constraints required by the specifications of the Bastide Niel eco-district was the use of the same material for the façade and the roof. BPM Architectes naturally opted for terracotta tiles with, to overcome the fragility of this type of product on the ground floor, the creation of a gray precast concrete base.

If the solution envisaged at the start was a glazed flat tile, the Diamant Huguenot with its multifaceted surface which favors the subtle play of light finally won all the votes.

As Anaïs Villalba of BPM Architectes points out "depending on light and weather conditions, silver gray offers color variations throughout the day. The 5 facets of the tile shine in a very different way and that really appealed to us".

Beyond this unique aesthetic aspect, it has significant thermal inertia and incomparable mechanical resistance, a guarantee of durability.

And all the more that in order to support BPM Architectes and give it the maximum guarantee of a robust tile, Edilians has carried out all the tests so that it benefits from a Q3 shock resistance classification for cladding installation » says Eric Lebeau, Edilians National Prescription Director.

As for the implementation of this interlocking tile with overall dimensions of 30,4×45 cm, “ beyond the volume and the quantity to be laid, it is above all the unique architecture of the building with its curved facades and gutters as well as its 45° roof slope which represented a real challenge » explains Mathieu Messager of Pyrénées Charpente.

This is the reason why the company hired the skills of a subcontractor for the implementation of the roofing on a taut rope after having first carried out the waterproofing of the crawlers using the Edilians Aero 2 underlay screen.

Solar energy to meet part of the electricity needs of the ZAC

The Bastide Niel eco-district wishing to favor local and renewable energy and reduce greenhouse gas emissions, a minimum photovoltaic production of 77.000 Kw/h per year was required for each block. To respond to this, BPM Architectes chose the Solaire Max tiles from Edilians.

With exactly the same exposure (340 to 440 mm) as the Diamant tile and equipped with an aluminum frame which is positioned directly on the battens in the continuity of the roof, the Solaire Max tiles blend into it without extra thickness. Their implementation is carried out quickly thanks to the Plug & Play electrical connections easily identifiable by their red and blue color, while guaranteeing an optimal seal with the rest of the roofing. Chosen in a slate color in reference to the silver color of the Diamond tile, they fit perfectly into the whole both from an architectural and functional point of view.

In total, 3.500 m² of Diamond Huguenot terracotta tiles were laid, at a rate of 1.800 m² on the roof (with a slope of 45%) and 1.700 m² in added cladding, as well as 900 Solar Max tiles with 16 cells, i.e. a surface area of ​​370 m² for optimal energy production of 75 Wp per tile, i.e. 67.500 Wp.