Description
ROSILUV is a stand-alone rainwater harvesting system designed to operate without the need for an existing roof or building. It attaches directly to an IBC water tank (1,000 litres) and collects rainwater across a 4.3 m² catchment area using four sloping galvanised steel petals that channel the water by gravity into the tank — distribution takes place without the need for a pump, electricity or heavy infrastructure. It can be installed on the ground in a garden, an urban courtyard or on a building’s roof terrace. Made in France, Rosiluv is the ideal solution for collecting rainwater on any surface, without the need for connection to a gutter or existing network.
A self-contained funnel roof
Its four petals direct rainwater by gravity towards the 1000L IBC tank completely autonomously — without roof connection, pump, or energy. A collection surface of 4.3 m² is sufficient to gradually fill the tank as rainfall occurs.
Technical characteristics
- Capture area: 4.3 m²
- Compatible with standard 1000L IBC
- Material: galvanized steel
- Installation: on the ground or on a roof terrace
- No pump, no electricity
- Made in France
Ideal for impermeable floors
Rosiluv is particularly well-suited to urban courtyards and rooftop terraces where installing a conventional rainwater harvesting system connected to a gutter is not feasible. It can be connected in series to several IBCs to increase storage capacity. For building facade installations, also consider the Reënstok, a facade-mounted rainwater tank.
Aides financières
Depending on the region, financial assistance may be available to support the move. If you live in the Île-de-France region, consult the available programs on 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.
FAQ
Frequently Asked Questions
Is the IBC container supplied with the ROSILUV?
No. The ROSILUV is sold separately. It is designed to be fitted onto a
standard 1,000-litre IBC water tank, which is available separately. For
roof terraces, 500-litre tanks are also compatible.
Do you need a roof to install the ROSILUV?
No, that is precisely what makes it unique. The ROSILUV is self-contained: it creates
its own 4.3 m² collection area and can be installed directly
on the ground in a garden, on a terrace or on a building’s roof terrace,
without needing to be attached to an existing building.
How much water can be collected using the ROSILUV?
With a catchment area of 4.3 m², a rainfall of 10 mm
(moderate rain) yields approximately 43 litres of collected water. In regions with average rainfall
(700 mm/year), a ROSILUV can fill a 1,000-litre IBC tank
several times per season.
Does the ROSILUV require a pump or electricity?
No. The water is distributed entirely by gravity. No pumps,
no electricity consumption, no mechanical maintenance.
Is it suitable for greening?
Yes. The ROSILUV can be fitted with extensive greening cassettes
(sedums) that transform the system into a green roof: it then helps
to manage rainwater whilst reducing urban heat islands.
Is there any financial assistance available for setting up a business?
Yes, depending on the region. In the Île-de-France region in particular, schemes
to support rainwater harvesting are available via the adaptaville.fr platform.
You should also check with your local council or local authority.
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