Description
Don’t have a roof or greenhouse in your vegetable garden?
In this case, it often becomes difficult to connect an existing roof to a water tank.
Rosiluv was designed specifically to address this constraint.
It allows rainwater to be collected and stored without relying on a building.
Rosiluv functions as a 4.3 m² stand-alone funnel roof, designed to attach directly
to an IBC-type water tank (1000 liters).
This makes rainwater collection simple and efficient, even without a roof.
Its four petals capture rainwater over a large surface area,
then naturally direct it by gravity to the reservoir.
In this way, water is stored without pumps, energy, or heavy infrastructure.
In addition, Rosiluv can also be installed on flat roofs,
where it blends in with the building’s architecture while ensuring
decentralized rainwater harvesting.
Finally, depending on the region, financial assistance may be available to support
the installation of rainwater harvesting systems.
If you live in the Île-de-France region, you can find out about the schemes available
via the following platform: adaptaville.fr
Installation on a flat roof
We offer the installation of ROSILUV on the roof terrace of your building.
In a context where urban planning documents (PLU(i)) mandate on-site stormwater management, ROSILUV provides a direct solution for projects lacking land suitable for underground cisterns. Rainwater, usually discharged without use, becomes a local resource, stored on the roof and utilized on-site, at the building level.
Smart water management from the roof
ROSILUV modules act as buffer tanks, intercepting rainwater before it is discharged into the sewers. The collected water is stored on the roof and then redistributed by simple gravity to the lower levels, without a pump or electricity consumption.
- Watering balconies, terraces and urban vegetable gardens
- Water supply for toilet cisterns
- Non-potable domestic uses
- Exterior cleaning
- Emergency water reserve
ROSILUV thus acts as a complement to the drinking water network.
An essential role in urban regulation
In the event of heavy rainfall, the reservoirs temporarily absorb the excess water, limiting the peak flow sent to the sewage system. This buffering function helps reduce the risk of saturation in dense urban areas.
Reinventing the albedo of rooftop terraces
The bitumen roof terrace is one of the blind spots of the urban thermal transition: dark, flat and with low albedo, it captures and accumulates heat.
With ROSILUV, the logic is reversed. The inclined galvanized steel modules reflect solar radiation back into the sky before it reaches the asphalt. The roof becomes a reflective surface rather than an absorbing one.
- Reduction of the building’s thermal load
- Improvement of the local microclimate
- Tank protection against overheating
The intelligence of the device lies in its geometry: it simultaneously ensures solar reflection and rainwater collection.
A green roof: the “sponge roof” version
ROSILUV can be complemented by pre-vegetated sedum cassettes, transforming the roof into a living surface.
This vegetation layer absorbs, retains, and then gradually releases water through evapotranspiration, while slowing runoff. Excess water is directed to reservoirs, ensuring continuity between vegetation and storage.
- Rainwater retention and storage
- Thermal improvement
- Contribution to urban biodiversity
Installation prerequisites
- Waterproof flat roofToiture-terrasse étanche
- Load-bearing structure compatible with an average load of 175 kg/m² (i.e. approximately 700 to 800 kg per module with water and vegetation spread over 4 m²)
- Possibility of creating a gravity-fed distribution network from the roof
A modular, adaptable, and scalable system
ROSILUV modules are fully modular and adapt to all roof terrace configurations.
ROSILUV on a rooftop terrace
A lightweight infrastructure for ecological urban architecture: capturing, storing, regulating, reflecting and greening water, from the rooftop.
Rosiluv is distributed in the form of a do-it-yourself kit, with 12 elements to assemble, bolts and assembly instructions.
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