Rehabilitation of the Javary Residence in Lille

It is an ambitious aesthetic and thermal renovation project which clearly illustrates the difficulties sometimes encountered by project owners in renovating old residential buildings into modern-looking complexes with efficient and comfortable housing for their occupants.

In Lille, at 7 rue Javary, this L-shaped residence has stood since the 50s, located between the Cité Administrative, the General Council, the Lille-Flandres station and close to the Lille Grand Palais. Property of ICF Habitat Nord-Est (housing division of the SNCF), this R+12 building with 94 housing units rises to almost 37 m in height. The whole benefited from a first renovation in 1990 with the creation of a 2-storey sloping roof, as well as COB (wooden frame construction) facades at the rear of the building.

The town hall and the European Metropolis of Lille, which, through the Euraflandres project, are transforming the public spaces around the Lille Flandres station to better accommodate a constantly increasing flow of travelers (25 million people pass through each year), wish today that the entire neighborhood gets in tune.

ICF Habitat Nord-Est therefore decided to carry out a new aesthetic renovation, to carry out thermal reinforcement, while resolving the problems with the existing cladding.

Difficulties for the project owner: the operation proved extremely complex. Because there was no technical advice to renovate a 32,5 meter high COB facade clad with ventilated asbestos slate cladding damaged by time. While managing issues of waterproofing, weight, hygrothermal energy and fire risk.

It took the will of ICF Habitat Nord-Est and the commitment of all partners in the project – the Maning design office, the installation company Sepic Nord co-contracting with Eiffage, and the industrial specialist in ITE Myral – to design, carry out the EFECTIS site inspection, the hygrothermal study and the tests (AEV), and arrive at the appropriate solution which has obtained conformity via an ATEx case B with the CSTB. This makes its insurability possible and constitutes a first step towards the Technical Approval from which other renovations presenting the same technical characteristics could benefit.

The facade solution: a low-carbon Myral insulating facing (aluminum, PIR insulation, recycled PVC) installed in cladding on battens on COB: M32 (R = 1,35 m².K/W) + rock wool insulation between Alpalene 70 battens of 70 mm of Isover (R = 2 m².K/W) forming a thermal screen. Or a total R = 3,35 m².K/W.

Implementation on occupied site is currently underway.