Project

CITY OF POISSY – SCHOOLS

The City of Poissy is committed to creating a comfortable environment for its schoolchildren.

Location

France

Building type

Public building

Application

Exterior

Fabric(s) used

Specifier(s)

Partner(s)

Schenker Stores

Stores Seas

Alterea Ingénierie

As part of its 2020 heatwave plan, the city equipped 15 schools with external ZIP blinds. This solution keeps classrooms cool while reducing energy consumption by limiting the need for air conditioning.
To identify the most effective approach, Alterea carried out thermodynamic studies comparing different solutions. External motorised blinds combined with high-performance fabrics proved to be the most efficient option.

As part of this energy renovation project, a total of 616 Schenker ZIP systems were installed using Mermet Satiné 5500 fabric in colour 0102 Grey White. This fabric was selected for its outstanding performance:

Rejects up to 96% of solar heat for excellent thermal protection
Filters 93% of light, ensuring optimal glare control thanks to its diagonal satin weave
Maximises natural daylight penetration
Maintains a clear outward view due to its exceptional transparency
Offers perfect compatibility with ZIP systems thanks to its dimensional stability, ensuring a durable, efficient and aesthetically pleasing solution

What makes this project unique is the use of thermodynamic studies by Alterea to compare alternatives to air conditioning. The goal was to limit overheating above 28°C to less than 3% of occupied time. High-performance fabrics combined with external motorised blinds clearly delivered the best results

Dominique Bulle, Head of Energy & Utilities for the City of Poissy.

Temperature and light sensors were installed in a test school during the summer of 2020. The results were conclusive: on 31 July, outdoor temperatures reached 39°C. In a classroom without blinds, temperatures rose to 32°C, whereas in a classroom equipped with external blinds, the temperature remained at 26.9°C.
By significantly lowering indoor temperatures, the blinds reduce energy use not only for cooling but also for lighting, as they allow ample natural daylight. Easy to operate and maintain, they integrate seamlessly into the building façade.

Solar shading is now a key component in sustainable building design. It helps reduce overall energy consumption by limiting the need for heating, cooling and artificial lighting. At the same time, it enhances occupant comfort by combining thermal protection, daylight control and visibility.
To meet these challenges, Mermet offers a range of solar shading fabrics recognised for their high thermal and optical performance, suitable for both interior and exterior applications.