Green roof system

Abstract

The present invention relates to a vegetated assembly (0) for a roof (11) comprising: - a basin (1) adapted to collect and store water; - a structure (2) disposed in the impermeable basin (1), comprising at least one basket (21) for receiving plants (22); - a system (4, 41, 6, 61, 7, 8, 81, 9, 10) for managing the water stored in the basin (1), - an irrigation system (5) for each basket (21) in fluidic communication with an irrigation channel (4), the irrigation channel (4) being in communication with a recovery channel (6) for the water stored in the basin (1); The system (4, 41, 6, 61, 7, 8, 81, 9, 10) for managing the water stored in the basin (1) is configured to: a) draw water from the basin (1) and convey it to the irrigation system (5); b) discharge a quantity of stored water. Figure for the abstract: Fig. 1

Description

Title of the invention: Green roof system technical field

[0001] The present invention relates generally to the field of green roofs. STATE OF THE ART

[0002] A green roof is a roof designed to accommodate a growing medium and a layer of vegetation. This alternative to traditional building roofing materials such as tiles, wood, or sheet metal provides additional thermal insulation as well as other advantages, including improved sound insulation, rainwater harvesting capacity limiting urban runoff, increased local biodiversity, and the absorption of carbon dioxide and certain fine particles.

[0003] We know of three main types of green roofs: extensive, intensive and semi-intensive roofs, which are distinguished from each other by the type of vegetation they can accommodate and therefore by the depth of their substrate.

[0004] Thus, extensive green roofs are covered with a very shallow layer of substrate (generally less than 10 cm), which most often supports a limited vegetation composed of succulent plants, resistant to water stress. The low mass of the system allows for the installation of such a roof on many older buildings, but offers little advantage due to its thinness.

[0005] Intensive green roofs, on the other hand, have a deeper substrate (generally more than 30 cm) and can support a high level of biodiversity, including shrubs and trees. However, the significant mass of such an assembly, multiplied when the substrate is saturated with rainwater, makes installation difficult on many pre-existing buildings.

[0006] Finally, semi-intensive green roofs fall between extensive and intensive green roofs in terms of substrate depth (generally 15 to 30 cm) and allow for the cultivation of a variety of larger plants (herbaceous plants, etc.) than extensive green roofs. Their substrate is thick enough to act as a rainwater buffer and provide effective thermal insulation, although this thickness varies depending on the substrate's moisture content, and it does involve a significant mass.

[0007] There is therefore a need to lighten green roofs, in order to optimize their advantages while facilitating their installation on existing buildings. Description of the invention

[0008] One aim of the present application is to remedy the aforementioned disadvantages by proposing a green roof system that allows for the precise management of the amount of water stored.

[0009] To this end, according to a first aspect of the invention, a green roof system is proposed comprising:

[0010] - a waterproof basin adapted for collecting and storing water, the basin waterproof being intended to be placed on the roof;

[0011] - a structure disposed in the impermeable basin, comprising at least one basket, each basket is adapted to hold plants;

[0012] - a system for managing water stored in the impermeable basin,

[0013] - an irrigation system for each basket in fluidic communication with a canal irrigation, the irrigation canal being in communication with a canal for recovering water stored in the impermeable basin;

[0014] the water management system stored in the impermeable basin being configured for:

[0015] a) to recover a predetermined quantity of water from the impermeable basin and convey it to the irrigation system

[0016] b) evacuate a quantity of water stored in the impermeable basin.

[0017] The vegetated assembly according to the invention is advantageously complemented by the following characteristics, taken alone or in any technically possible combination thereof:

[0018] - the system for managing the water stored in the impermeable basin comprises:

[0019] - a recovery channel configured to conduct water from the impermeable basin towards a drain valve and / or towards the irrigation canal, the drain valve being configured to drain water from the impermeable basin,

[0020] - a pump configured to bring water from the recovery channel to the channel irrigation,

[0021] - a sensor, disposed in the waterproof basin and configured to measure a volume of water stored in the impermeable basin,

[0022] - a control unit configured to actuate, depending on the volume measured by the sensor, the drain valve and thus implement step b) depending on the volume of water stored in the impermeable basin.

[0023] - at least one basket and the irrigation system are configured for a crop plants in sub-irrigation by mat, the irrigation system comprising a geotextile mat configured to be in contact with at least one basket, the geotextile mat and at least one basket being configured to conduct water by capillary action to the plants when the irrigation system is supplied with water;

[0024] - at least one basket and the irrigation system are configured for a cultivation of plants in micro-irrigation, the irrigation system being configured to irrigate the plants by drip irrigation;

[0025] - the system for managing the water stored in the impermeable basin includes in in addition to a set of environmental sensors and in which the control unit is further configured to operate, according to the signal received from the set of environmental sensors, the discharge valve and / or the pump; so that the control unit commands the water management system stored in the impermeable basin to implement steps a) and / or b) according to environmental parameters;

[0026] - the environmental sensor set is configured to measure one or several of the following parameters including temperature, atmospheric pressure, wind speed, humidity, dew point, rainfall;

[0027] - the control unit further comprises a communication module, the module of communication being configured to receive control signals from a source external to the vegetated assembly and to transmit them to the control unit, so that the control unit commands the water management system stored in the impermeable basin to implement steps a) and / or b) according to the control signals received from a source external to the vegetated assembly;

[0028] - the system for managing the water stored in the impermeable basin includes in in addition to a supply valve, configured to be connected to a domestic network, the supply valve being configured to discharge into the impermeable basin recycled water from a domestic water circuit on command from the control unit, the recycled water being suitable for use in irrigation.

[0029] The invention also relates to a method for managing a green roof system according to the invention, comprising the following steps:

[0030] - The emission by the sensor of a signal representative of a quantity of stored water in the waterproof basin,

[0031] - E4 reception of the signal representing a quantity of water stored in the basin waterproof by the control unit,

[0032] - E5 depending on the signal representing a quantity of water stored in the basin waterproof and with predefined irrigation frequency and volume, the control unit issues a pump activation command.

[0033] - E6 as a function of the signal representing a quantity of water stored in the basin waterproof, emission by the control unit of a command to open the drain valve.

[0034] The process can be advantageously supplemented by one or more of the following steps: - between steps E1 and E4, a step E2 of emission by a set of environmental sensors of signals representative of environmental parameters, step E4 further including the reception of signals representative of environmental parameters and steps E5 and E6 being implemented according to these signals representative of environmental parameters; - between steps E1 and E4, a step E3 of emission by an external source to the vegetated set of control signals, step E4 further including the reception of the control signals and steps E5 and E6 being implemented according to these control signals; - an E7 step of emission by the control unit of a command to open the supply valve, based on at least one element from the following list: a signal representing a quantity of water stored in the impermeable basin, signals representing environmental parameters, a control signal. DESCRIPTION OF THE FIGURES

[0035] Other features, objectives and advantages of the invention will become apparent from the following description, which is purely illustrative and not limiting, and which should be read in conjunction with the accompanying drawings on which:

[0036] Fig. 1 is a schematic view of a vegetated assembly according to a first embodiment of the invention;

[0037] Figure 2 is a schematic view of a vegetated area according to a mode alternative implementation of the invention;

[0038] Fig. 3 is a schematic view of a vegetated area according to a second method of implementing the invention;

[0039] Fig. 4 is a schematic view of a vegetated area according to a third method of implementing the invention;

[0040] Figure 5 is a schematic view of a vegetated area according to a fourth method of implementing the invention;

[0041] Figure 6 is a diagram showing the steps of a process for managing a quantity of stored water implemented in an embodiment of the invention.

[0042] Throughout the figures, similar elements bear identical references. DETAILED DESCRIPTION OF THE INVENTION

[0043] Throughout the following description, as illustrated [Fig. 1], the vegetated assembly 0, preferably placed on a roof 11, comprises a waterproof basin 1, consisting, for example, of an open tank lined with a waterproof tarpaulin, so as to collect rainwater and store it while providing thermal insulation for the roof 11 on which the waterproof basin 1 is placed. Alternatively, a suitably shaped roof 11 can also serve as a waterproof basin 1. The waterproof basin 1 constitutes a true waterproofing layer over the covered perimeter and a retrofit for renewing the waterproofing of the roof 11. The waterproof basin 1 includes an overflow outlet and an inspection chamber to prevent the stored water from overflowing. The overflow outlet will be positioned at a height above the waterproof basin 1 determined following a building analysis to allow the water to be retained in the waterproof basin 1 according to the maximum load permissible by the roof 11. Thermal insulation can be further enhanced using the principle of inverted insulation, by covering the roof 11 with a layer of insulation 12 on which the waterproof basin 1 is placed.The insulation layer 12, for example made of polyurethane, is then held in place by the mass of the vegetated assembly 0 placed on top of it and helps to limit the heat exchange of the building to which the roof 11 belongs with the external environment over the entire surface covered by the vegetated assembly 0.

[0044] The planted assembly 0 holds plants 22 by means of a structure 2, which includes baskets 21 adapted to receive the plants 22. The structure 2 is, for example, placed at the bottom of the impermeable basin 1 or fixed to the edges of the impermeable basin 1 so that the plants 22 it supports ideally cover a majority of the surface area of ​​the impermeable basin 1. The structure 2 has sufficient height to keep the baskets 21 out of the water when the impermeable basin 1 is filled to its maximum capacity. The structure 2 is preferably as lightweight as possible and can therefore be, for example, a frame made of plastic profiles, preferably recycled plastic. In accordance with building codes, a drainage perimeter not containing plants 22 is maintained around the edge of the impermeable basin 1.This drainage perimeter is, for example, formed by strips 40 centimeters wide, the width being measured from the edges of the impermeable basin 1, the strips not containing any vegetation 22. To this end, the structure 2 is configured so that the baskets 21 are sufficiently far from the strips of the drainage perimeter. Similarly, the structure 2 can include surfaces configured to be devoid of vegetation 22, by arranging the baskets 21 in such a way as to allow a user to circulate within the vegetated area 0.

[0045] The plants 22 thus form an insulating layer covering the entire surface of the impermeable basin 1, an insulating layer which limits the temperature rise of the roof surface 11 and cools the ambient air via evapotranspiration from the plants 22. This effect is further enhanced by the use of a permeable membrane 3, fixed to the structures 21 and which has openings allowing the plants 22 to cross while covering the entire surface of the impermeable basin 1. The permeable membrane 3 allows rainwater to pass through but protects the stored water and plant roots 22 from wind and solar radiation.

[0046] The quantity of water stored in the impermeable basin 1 is controlled by a system 4, 41, 6, 61, 7, 8, 81, 9, 10 which has the main functions, on the one hand, of recovering water from the impermeable basin 1 in a determined quantity and bringing it to an irrigation system 5 and on the other hand of evacuating in a controlled manner a quantity of water stored in the impermeable basin 1 to a specific network or to the pre-existing rainwater drainage system of the roof 11.

[0047] To fulfill these functions, the system 4, 41, 6, 61, 7, 8, 81, 9, 10 includes a recovery channel 6, located at the bottom of the basin, which allows water to be drawn from it for a discharge valve 61 and / or an irrigation channel 4. The irrigation channel 4 carries the water drawn from the recovery channel 6, for example by means of a pump 41, to an irrigation system 5 of each basket 21, in order to irrigate the plants 22.

[0048] The pump 41 and the discharge valve 61 are controlled by a control unit 8 configured to actuate one and / or the other in order to manage the quantity of water present in the impermeable basin 1. Depending on the needs of plants 22, the control unit 8 controls the operation of the pump 41 to convey the water by suction from the impermeable basin 1 to the irrigation system 5 via the recovery channel 6 and the irrigation channel 4, for example according to a schedule of a predefined watering frequency and volume recorded in a memory of the control unit 8.

[0049] Furthermore, a sensor 7 can be placed inside the impermeable basin 1. The sensor 7 measures the water level relative to the bottom of the impermeable basin 1, the volume of water stored, or more generally the quantity of water stored in the impermeable basin 1, and emits a signal representing this measurement to the control unit 8. The control unit 8 can then control the operating time and power of the pump 41 and the opening time of the discharge valve 61 as a function of the quantity of water present in the impermeable basin 1. For example, the control unit 8 commands the opening of the discharge valve 61, which is preferably a solenoid valve, in order to empty the impermeable basin 1 if the volume of water stored is too large, typically if it exceeds a predefined threshold and irrigation of the plants 22 is not desirable.

[0050] On the other hand, the baskets 21 and the irrigation system 5 can be adapted for growing plants aeroponically, the baskets 21 exposing the largest possible surface area of ​​the plants 22 to the air, while the irrigation system 5 is configured to irrigate each basket 21 and the plants 22 by misting with water from the canal 4. Alternatively, using waterproof baskets 21, the cultivation of plants 22 follows the principles of hydroponics using an irrigation system 5 circulating water from the irrigation channel 4 into the baskets 21. In a third alternative, the plants 22 are irrigated by micro-irrigation, using an irrigation system 5 conveying water from the irrigation channel 4 into a light substrate through "drip" nozzles.

[0051] In a fourth alternative, illustrated [Fig. 2], the irrigation system 5 is adapted for sub-irrigation cultivation, more particularly sub-irrigation using a mat, and therefore comprises a geotextile mat 51, fixed or placed at the base of the baskets 21 and covering the entire surface of the impermeable basin 1. The irrigation system 5 conveys water to the upper surface of the geotextile mat 51, for example via a flexible pipe, or to each basket 21 via several flexible or rigid pipes. The geotextile mat 51, for example an absorbent membrane with a thickness of between 1 and 10 millimeters, then enables irrigation by drawing water up to the roots of the plants 22 by capillary action, via the baskets 21, by direct contact with the roots of the plants 22, or by any other suitable means.

[0052] Such a geotextile mat 51 also provides a filtration function by retaining objects and particles, for example debris from baskets 21 and plants 22, or more generally by filtering any object or particle coming from outside the impermeable basin 1, having passed through the permeable membrane 3 where appropriate. Thus, the water stored in the impermeable basin 1 has its turbidity reduced and its general cleanliness improved.

[0053] These cultivation methods offer several advantages by directly irrigating the root system of the plants 22 with controlled volumes of water. This allows for faster and healthier growth of the plants 22, accompanied by a significant reduction in diseases and pests affecting them.

[0054] In a second embodiment, illustrated in [Fig. 3], the control unit 8 receives signals from an environmental sensor set 9 that represent environmental parameters. By environmental parameters, it is understood that the environmental sensor set 9 is positioned so that the measurements taken by the various sensors in the environmental sensor set 9 are made outside the impermeable basin 1, in relative proximity to it, without exceeding a distance of fifty meters. The sensors in the environmental sensor set 9 can measure temperature, atmospheric pressure, wind speed, humidity, dew point, rainfall, carbon dioxide concentration in the air, or any other parameter relevant to assessing the amount of water needed for proper irrigation of plants 22 or the amount of water to be stored. in the impermeable basin 1. Optionally, the control unit 8 is configured to predictively activate the pump 41 and / or the discharge valve 61 based on meteorological information transmitted by the environmental sensor set 9, for example, by opening the discharge valve 61 to reduce the amount of water stored in the impermeable basin 1 in anticipation of heavy rainfall. This behavior allows the vegetated system 0 to act as a buffer reservoir to control the flow of rainwater from the roof 11 to the ground, which is particularly advantageous in urban environments to prevent the saturation of drainage networks and the resulting flooding.

[0055] In a third embodiment, illustrated in [Fig. 4], the control unit 8 is equipped with a communication module 81, that is to say, any suitable means for transmitting and receiving, preferably wirelessly, intelligible signals transmitted or received by an external source. An external source is understood to be a device comprising communication means similar to and compatible with those of the communication module 81, the external source being located at a significant distance from the vegetated area 0, i.e., more than 50 meters. The external source is, for example, a control station in charge of one or more vegetated areas 0, communicating information and / or instructions to the control unit 8 via the communication module 81.As an alternative to the second embodiment, such a remote control station includes a set of environmental sensors similar to the environmental sensor set 9, so as to form a weather station and communicate meteorological information to the control unit 8, based on which it controls the pump 41 and / or the discharge valve 61. The external source can also directly communicate frequencies, irrigation volumes or any other information relevant to the system 4, 41, 6, 61, 7, 8, 81, 9, 10 for managing water stored in the impermeable basin 1. This makes it possible, for example, to control several systems 4, 41, 6, 61, 7, 8, 81, 9, 10 for managing water stored in impermeable basins 1 of vegetated systems 0 from a single external source and to reduce the number of sensors deployed.

[0056] The communication module 81 can also communicate to the external source information relating to the quantity of water stored in the impermeable basin 1 from a sensor 7, as well as a history of the activations of the pump 41 and the discharge valve 61, in order for example to signal a possible leak in an impermeable basin 1 by comparing the information of several vegetated sets 0 and by signaling a quantity of water stored too different from the compared vegetated sets 0 without the difference being attributable to irrigation or discharge.

[0057] In a fourth embodiment, illustrated [Fig.5], the system 4, 41, 6, 61, 7, 8, 81, 9,10 for managing the water stored in the impermeable basin 1 further includes a supply valve 10 configured to discharge, on command from the control unit 8, into the impermeable basin 1 recycled water from a domestic network 13 of the building under the roof 11, for example so-called "grey" water (from showers, baths, sinks, washing machines, and other similar domestic devices) having been filtered and treated to allow its use for the irrigation of plants 22, particularly in dry periods, when rainfall is too low to provide on its own a sufficient quantity of water stored in the impermeable basin 1 for irrigation.

[0058] Of course, the embodiments of the invention described in this description can be implemented and carried out not only with the stated cultivation methods, namely subirrigation, micro-irrigation, hydroponics and aeroponics, but also with any other cultivation method suitable for growing plants 22 in the vegetated system 0. In addition, the characteristics of the embodiments are combinable with each other.

[0059] The system 4, 41, 6, 61, 7, 8, 81, 9, 10 for managing the water stored in the impermeable basin 1 implements a method for managing the vegetated assembly 0 in which the sensor 7 and / or the environmental sensor assembly 9 respectively emit, during steps E1 and E2, a signal representing a quantity of water stored in the impermeable basin 1 and signals representing environmental parameters to the control unit 8, which receives these signals during a step E4. Optionally, the control unit 8 receives, via a communication module 81, control signals emitted by a source external to the vegetated assembly 0 during a step E3.

[0060] Depending on the signals received, but also on predefined frequencies and volumes stored in the internal memory of the control unit 8, said control unit 8 operates the pump 41 and / or the discharge valve 61 in order to irrigate the plants 22 and / or to empty the impermeable basin 1.

[0061] The proposed green roof system 0 offers numerous advantages, some of which have already been mentioned. Compared to prior art devices and methods, the use of baskets 21 and an irrigation system 5 employing sub-irrigation with mats or micro-irrigation by drip irrigation makes it possible to considerably reduce, or even eliminate, the amount of substrate required. This results in a significant reduction in the mass of the green roof system 0, which is advantageous from the outset when installed on a roof 11, but also allows installation on more fragile roofs 11. Without substrate to absorb irrigation or rainwater not absorbed by the plants 22, it is collected directly by the impermeable basin 1, thanks to the arrangement Baskets 21 are placed by structure 2 above it. The management system 4, 41, 6, 61, 7, 8, 81, 9, 10 thus allows for dynamic management of almost all the water in the vegetated area 0, which consequently makes it possible to vary the amount of water stored as well as the thermal insulation capacity of the vegetated area 0 according to needs. In particular, the use of a set of environmental sensors 9 allows, advantageously and predictively, for adaptation to weather conditions.

Claims

Demands

1. Vegetated assembly (0) for roof (11) comprising: - an impermeable basin (1) adapted to collect and store water, the impermeable basin (1) being intended to be placed on the roof (il); - a structure (2) placed in the impermeable basin (1), the structure (2) comprising at least one basket (21), each basket (21) being adapted to receive plants (22), the structure (2) having a height sufficient to keep each basket (21) out of the water stored in the impermeable basin (1) when the impermeable basin (1) is filled to a maximum of its capacity; - a system (4, 41, 6, 61, 7, 8, 81, 9, 10) for managing the water stored in the impermeable basin (1), - an irrigation system (5) for each basket (21) in fluidic communication with an irrigation canal (4), the irrigation canal (4) being in communication with a recovery canal (6) for the water stored in the impermeable basin (1);the system (4, 41, 6, 61, 7, 8, 81, 9, 10) for managing the water stored in the impermeable basin (1) being configured to: a) recover water from the impermeable basin (1) in a determined quantity and bring it to the irrigation system (5) b) discharge a quantity of water stored in the impermeable basin (1).;

2. Vegetated assembly (0) for roof (11) according to claim 1, wherein the system (4, 41, 6, 61, 7, 8, 81, 9, 10) for managing water stored in the impermeable basin (1) comprises: - a recovery channel (6) configured to conduct water from the impermeable basin (1) to a discharge valve (61) and / or to the irrigation channel (4), the discharge valve (61) being configured to discharge water from the impermeable basin (1); - a pump (41) configured to bring water from the recovery channel (6) to the irrigation channel (4); - a sensor (7), disposed in the impermeable basin (1) and configured to measure a volume of water stored in the impermeable basin (1); - a control unit (8) configured to actuate, according to the volume measured by the sensor (7), the drain valve (61) and thus implement step b) depending on the volume of water stored in the impermeable basin (1).

3. A green roof system (0) for a roof (11) according to any one of claims 1 to 2, wherein at least one basket (21) and the irrigation system (5) are configured for growing plants (22) by sub-irrigation using a mat, the irrigation system (5) comprising a geotextile mat (51) configured to be in contact with at least one basket (21), the geotextile mat (51) and at least one basket (21) being configured to conduct water by capillary action to the plants (22) when the irrigation system (5) is supplied with PQ11

4. Cdll. Vegetated assembly (0) for roof (11) according to any one of claims 1 to 2, wherein at least one basket (21) and the irrigation system (5) are configured for growing plants (22) by micro-irrigation, the irrigation system (5) being configured to irrigate the plants (22) by drip irrigation.

5. Vegetated assembly (0) for roof (11) according to any one of claims 2 to 4, wherein the system (4, 41, 6, 61, 7, 8, 81, 9, 10) for managing water stored in the impermeable basin (1) further comprises a set of environmental sensors (9) and wherein the control unit (8) is further configured to actuate, according to the signal received from the set of environmental sensors (9), the discharge valve (61) and / or the pump (41); such that the control unit (8) commands the system (4, 41, 6, 61, 7, 8, 81, 9, 10) for managing water stored in the impermeable basin (1) to implement steps a) and / or b) according to environmental parameters.

6. Vegetated assembly (0) for roof (11) according to claim 5, wherein the environmental sensor assembly (9) is configured to measure one or more of the following parameters among temperature, atmospheric pressure, wind speed, humidity, dew point, rainfall.

7. A green roof system (0) for a green roof (11) according to any one of claims 2 to 6, wherein the control unit (8) further comprises a communication module (81), the communication module (81) being configured to receive control signals from a source external to the green roof system (0) and to transmit them to the control unit (8), such that the unit control (8) commands the system (4, 41, 6, 61, 7, 8, 81, 9, 10) for managing the water stored in the impermeable basin (1) to implement steps a) and / or b) according to the control signals received from a source external to the vegetated assembly (0).

8. Vegetated assembly (0) for roof (11) according to any one of claims 1 to 7, wherein the system (4, 41, 6, 61, 7, 8, 81, 9, 10) for managing the water stored in the impermeable basin (1) further comprises a supply valve (10), configured to be connected to a domestic network (13), the supply valve (10) being configured to discharge into the impermeable basin (1) recycled water from a domestic water circuit on control of the control unit (8), the recycled water being suitable for use in irrigation.

9. Method for managing a green roof system (0) for a roof (11) according to any one of claims 2 to 8, the method being implemented by the system (4, 41, 6, 61, 7, 8, 81, 9, 10) for managing the water stored in the impermeable basin (1), the method comprising the following steps: - E1 emission by the sensor (7) of a signal representing a quantity of water stored in the impermeable basin (1); - E4 reception of the signal representing a quantity of water stored in the impermeable basin (1) by the control unit (8); - E5 depending on the signal representing a quantity of water stored in the impermeable basin (1) and predefined irrigation frequency and volume, emission by the control unit (8) of a command to activate the pump (41); - E6 depending on the signal representing a quantity of water stored in the impermeable basin (1), emission by the control unit (8) of a command to open the discharge valve (61).

10. Method of managing a green roof system (0) for roof (11) according to claim 9 comprising between steps E1 and E4 a step E2 of emission by a set of environmental sensors (9) of signals representative of environmental parameters, step E4 further comprising the reception of the signals representative of environmental parameters and steps E5 and E6 being implemented according to these signals representative of environmental parameters.

11. Method of managing a green roof system (0) for roof (11) according to one of claims 9 or 10, comprising between steps E1 and E4 a step E3 of emission by a source external to the green roof system (0) of control signals, step E4 further comprising the reception of the control signals and steps E5 and E6 being implemented according to these control signals.

12. Method of managing a green roof system (0) for a roof (11) according to any one of claims 9 to 11, comprising a step E7 of emitting by the control unit (8) a command to open the supply valve (10), as a function of at least one element from the following list: a signal representing a quantity of water stored in the impermeable basin (1), signals representing environmental parameters, a control signal.

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