La Passerelle, Villeurbanne: IsoHemp blocks at the heart of a project with social and environmental impact.

Addressing the challenges of sustainable social housing.

The construction of La Passerelle in Villeurbanne takes place in a shifting context for social housing, which faces increasing demands for energy performance and the need to reduce its carbon footprint. Led by the ARALIS Foundation, this project of 92 homes, including 26 supported living units, combines performance, durability, and social innovation.

As part of the L’Autre Soie programme, La Passerelle is a benchmark for low-carbon construction in the metropolitan area, featuring ambitious technical solutions, including the use of IsoHemp hemp blocks for the building’s envelope.

A bio-based material tailored to large-scale projects.

To ensure both thermal comfort for occupants and control of energy consumption, the project includes 1,588 m² of IsoHemp hemp blocks for interior insulation.

The decision was based on several criteria :

High thermal and acoustic performance
Natural moisture regulation, supporting a healthy indoor environment
Fast installation, thanks to the modular block format

Hemp blocks also proved regulatory compliant, meeting RE 2020 targets while respecting technical project constraints.

We are responsible for housing quality and environmental impact.
This project shows that energy efficiency and affordable housing can coexist.

- President, ARALIS Foundation

Gilles Desrumaux

Project ownership and environmental strategy.

The construction site leverages several eco-construction methods :

Re-use: 3,590 kg of reclaimed steel for structural elements.
Energy production: photovoltaic panels and connection to district heating.
Bio-based materials: hemp and other low-carbon alternatives.

IsoHemp provided technical support throughout design and construction, ensuring seamless integration of hemp blocks within project requirements.

See the reference project

Delivery in 2026 –
A flagship for low-carbon social housing.

With this achievement, IsoHemp reaffirms the relevance of its solutions in complex projects combining environmental logic with social and urban demands.

La Passerelle is a concrete example of hemp block integration in collective housing operations, where performance, durability and occupant comfort are central priorities.