WO2015022550A1 - Système d'atténuation d'eau et procédé d'atténuation d'écoulement d'eau de pluie - Google Patents

Système d'atténuation d'eau et procédé d'atténuation d'écoulement d'eau de pluie Download PDF

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Publication number
WO2015022550A1
WO2015022550A1 PCT/GB2014/052517 GB2014052517W WO2015022550A1 WO 2015022550 A1 WO2015022550 A1 WO 2015022550A1 GB 2014052517 W GB2014052517 W GB 2014052517W WO 2015022550 A1 WO2015022550 A1 WO 2015022550A1
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WO
WIPO (PCT)
Prior art keywords
water
container
base
lid
apertures
Prior art date
Application number
PCT/GB2014/052517
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English (en)
Other versions
WO2015022550A8 (fr
Inventor
Michael Thomas COTTAGE
Charles Martyn MELLING
Andrew White
Original Assignee
Aquaten Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aquaten Limited filed Critical Aquaten Limited
Priority to EP14758617.6A priority Critical patent/EP3033459A1/fr
Publication of WO2015022550A1 publication Critical patent/WO2015022550A1/fr
Publication of WO2015022550A8 publication Critical patent/WO2015022550A8/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D11/00—Roof covering, as far as not restricted to features covered by only one of groups E04D1/00 - E04D9/00; Roof covering in ways not provided for by groups E04D1/00 - E04D9/00, e.g. built-up roofs, elevated load-supporting roof coverings
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D11/00—Roof covering, as far as not restricted to features covered by only one of groups E04D1/00 - E04D9/00; Roof covering in ways not provided for by groups E04D1/00 - E04D9/00, e.g. built-up roofs, elevated load-supporting roof coverings
    • E04D11/005—Supports for elevated load-supporting roof coverings
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
    • E04D13/04—Roof drainage; Drainage fittings in flat roofs, balconies or the like
    • E04D13/0404—Drainage on the roof surface
    • E04D13/0477—Underroof drainage layers

Definitions

  • the invention relates to a water attenuating system and a method of attenuating rainwater flow, particularly but not exclusively for roofs of buildings and/or other fixed structures.
  • flash flooding localised flooding
  • the average daily rainfall in London is reported to be 1 .8 mm.
  • London's drainage system has been constructed to accommodate in excess of that rainfall, but is often unable to accommodate the peak flows which are experienced during heavy rainfall.
  • Green roofs i.e. roofs which carry vegetation and supporting soil (or an artificial growing medium) which can retain water and thereby attenuate peak flow rates.
  • Green roofs are often used as part of an effective sustainable drainage system (SUDS) and can reduce the total amount of water run-off from the roof during periods of heavy rainfall, as well as reducing the peak flow. Green roofs can consequently reduce the downstream need for expensive drainage infrastructure and can also reduce the risk of localised flooding events.
  • SUDS effective sustainable drainage system
  • a green roof can typically retain between 40 and 50% of the rain which falls upon it each year.
  • a green roof can also provide an insulation benefit.
  • US patent application 2009/0188172 discloses a green roof system which is designed to temporarily retain rain water and therefore reduce the peak flow during periods of heavy rainfall.
  • the system includes a drainage layer having a number of receptacles to retain water.
  • FIG. 2004/020762 discloses a modular ballast system for a green roof.
  • the system comprises a number of modules which can be connected together, each module being a shallow container in which water can be retained.
  • the containers each have a number of drainage holes in their side walls, so that rainwater will fill the containers before passing out through the drainage holes.
  • a wicking material can be inserted into the containers to allow water to be drawn out.
  • Small seepage holes can be provided in the bottom of the containers to allow for controlled drainage from the containers.
  • GB patent application 2 484 739 discloses a drainage and water attenuation system for a green roof, and provides a fluid buffer for reducing peak flow.
  • a drainage component comprising an impermeable sheet is formed into a number of recesses which can each retain rainwater. There are drainage holes in the bottom of some or all of the recesses to allow the controlled escape of rainwater.
  • Green roofs increase construction costs, and they can be difficult to fit due to poor access, particularly in built up urban areas. Green roofs also require long term maintenance. Many green roof systems, including those described in the above documents, are suitable only for use on flat roofs and cannot be used on pitched roofs, so that the available area which can be used for rainwater attenuation in an urban area is significantly reduced.
  • green roofs can require irrigation and the cost of providing an irrigation system to the roof of a building (particularly an existing building) can be prohibitive.
  • the weight of a green roof is also an issue which prevents their use on many buildings.
  • Another method of attenuating water is to provide one or more water tanks upon a building roof, or within the drainage system of the roof. The tanks act as a temporary reservoir to reduce the peak flow during periods of heavy rainfall. However, such water tanks are expensive. A full water tank is also very heavy and is therefore not suitable for all buildings (and requires considerable structural planning for those buildings having roofs which can withstand the loading).
  • US patent 6,606,823 discloses a modular arrangement of containers for covering a (flat) roof. Whilst some of the containers can accommodate vegetation (and have the necessary irrigation), others have no vegetation and are provided only for water attenuation.
  • the containers are metal or plastic and the bottom of each container has a number of troughs separated by ridges. The troughs are provided to capture and retain rain water, and the ridges have drainage holes to allow the controlled escape of excess water.
  • a water-retention layer is provided as a bag comprising a permeable wall containing a water-absorbent filling. In the embodiments designed for water attenuation only, the permeable top wall of the bag is fully exposed to falling rainfall. Adjacent bags are secured together, and ballast is added at selected locations, to hold the bags onto the roof.
  • An aim of the present invention is to provide an improved, lightweight, easy to install, and cost-effective, water attenuating roofing system.
  • the volume of rainwater which the water attenuating roofing system can absorb, and can temporarily store, can be chosen to suit the roof to which the system is to be fitted, and in particular to suit the drainage system of the roof and surrounding environment.
  • the water attenuating roofing system will absorb and temporarily store up to 22 mm of rainwater, it being expected that the temporary storage of this amount of water will significantly reduce the peak flow rate into the drainage system, and in many cases will be sufficient to reduce the peak flow rate to a level which can be accommodated by the drainage system to thereby avoid flooding. It is, however, expected that the invention will be utilised in systems which are able to absorb less than 22 mm of rainwater, and in other systems which are able to absorb more than 5 mm of rainwater.
  • a separate aim of the present invention is to provide a water attenuating roofing system which releases water back into the atmosphere through evaporation and/or into the drainage system in a controlled manner.
  • a water attenuating system comprising a number of modules and a mounting structure for the module(s), the mounting structure being adapted for securement to a building or the like, each module comprising a container having a base and at least one sidewall, the module further comprising a lid which is releasably securable to the container, a water-absorbent material being located in the container between a water permeable top layer and a water permeable bottom layer, the lid and the base having apertures to allow the passage of water therethrough, the mounting structure including a number of spacers adapted to separate the base from the building in use.
  • the modules therefore comprise a five-layer structure comprising (from top to bottom): ⁇ i ⁇ the apertured lid, ⁇ ii ⁇ the permeable top layer, ⁇ iii ⁇ the water-absorbent material, ⁇ iv ⁇ the permeable bottom layer and ⁇ v ⁇ the apertured base.
  • the apertured lid acts to retain the water-absorbent material within the container, and thereby retain the water- absorbent material in its chosen position without requiring ballast or the like.
  • the inventors have realised that it is desirable to provide a system which is solely concerned with water attenuation and is not also concerned with supporting a green roof.
  • the inventors therefore dispense with any growing medium or vegetation layers which are used with green roofs. Those layers necessarily reduce the evaporation from the water-absorbent material, and therefore reduce the attenuation effectiveness during successive periods of heavy rainfall.
  • the inventors therefore seek to maximise the evaporation rate from the water-absorbent material so as to allow the water-absorbent material to dry out (re-charge) as quickly as possible and thereby be available for a subsequent period of heavy rainfall.
  • the water-absorbent material is designed to retain water and it is necessary to maximise the exposure of the material in order to encourage evaporation.
  • Embodiments of the present invention having a water-absorbent material which is adapted to store up to 22 mm of rainfall have been tested and found to be effectively dry (from fully wet) in around 13 hours through evaporation alone.
  • the time taken to re-charge the water-absorbent material depends upon the volume of water which had been absorbed, and it may be desirable in some applications to provide a water-absorbent material which can store less than or more than 22 mm of rainfall, and which will take less time or more time to re-charge respectively. Also, the water-absorbent material will re-charge more quickly if the ambient temperature is higher, and there is a greater air flow above and below the module.
  • the module contains a filter layer above the top layer.
  • a filter layer may be suitable in areas having greater pollution levels, such as city centres, it being known that rainwater washes pollutants and particulates out of the air. It is desirable to prevent the pollutants and particulates from passing through the top layer and into the water- absorbent material as that might reduce the effectiveness of the water-absorbent material. It is also desirable to prevent the pollutants and particulates from entering the drainage system if possible. It is understood that the addition of a filter layer will reduce the evaporation rate from the water-absorbent material, but the benefits of providing a filter layer will in some environments outweigh the disadvantage in terms of re-charge time.
  • a removable lid allows for the routine maintenance of the system, including for example the routine replacement of the water-absorbent material and the filter layer if present.
  • the volume of water which the water- absorbent material can retain will diminish over a number of years and it is desirable to be able to replace the material.
  • the filter layer is expected to become contaminated over time and the ability to remove and replace the filter layer without also removing the water-absorbent material is highly advantageous.
  • the container is secured to the mounting structure by first fasteners (such as screws or bolts) and the lid is secured to the container by second fasteners.
  • first fasteners such as screws or bolts
  • second fasteners for the lid allows the lid to be removed (for replacement of the water- absorbent material and/or the filter layer, as required) without releasing the container from the mounting structure.
  • the container can therefore remain securely fixed in position and the integrity and security of the system is not compromised during replacement of the water-absorbent material and/or the filter layer.
  • the mounting structure is securely fixed to the building (e.g. to the roof of the building), and that the container is securely fixed to the mounting structure, so as to secure the modules in position in the presence of high winds.
  • the system can be relatively lightweight, and its relative lightness together with the air flow between the module and the roof increase the likelihood of the modules being lifted by high winds.
  • the mounting structure must therefore be sufficiently robust to resist the tendency of the modules to be moved by high winds.
  • the size of the apertures in the lid are larger than the size of the apertures in the base.
  • the lid is designed to allow rainwater readily to pass through to the water-absorbent material.
  • the apertures in the lid must be large enough to prevent the surface tension of the water from forming water droplets or a water film upon the lid and blocking the apertures.
  • the apertures in the lid have a cross- sectional dimension of at least 10 mm and preferably around 15 mm.
  • the apertures are square with a side length of at least 10 mm and preferably around 15 mm.
  • the size of the apertures in the base can, however, be smaller since they will need to accommodate less water flow.
  • the base is, however, required to support the weight of the water-absorbent material when filled with water, and yet to permit evaporation from the water-absorbent material into the air underneath the container.
  • the apertures in the base have a cross-sectional dimension of less than 10 mm and preferably around 8 mm.
  • the apertures are square with a side length of less than 10 mm and preferably around 8 mm.
  • the water-absorbent material does not completely fill the container (i.e. it does not completely cover the base), so that there is a gap alongside at least a part of the water-absorbent material through which water may flow directly from the lid and out of the base. Accordingly, some of the rainwater can pass through the module without being absorbed by the water-absorbent layer. Provided that the rate of water flow through the module does not exceed the capacity of the drainage system this bypassing water will not cause localised flooding.
  • the inventors have realised that the passage of some of the rainwater directly to the drainage system, even during periods of heavy rainfall, can be advantageous since the drainage system is being utilised (below its maximum capacity) throughout the rainfall event.
  • the water-absorbent material is ideally a super absorbent fibre (SAF) available from Technical Absorbents Limited, of 1 Moody Lane, Great Coates, Grimsby, DN31 2SS (www.techabsorbents.com). Similar suitable materials are alternatively referred to as a super absorbent polymer (SAP), or a water-absorbent fibre (WAF).
  • SAF super absorbent fibre
  • a method of attenuating rainwater flow comprising the steps of: ⁇ i ⁇ providing a water attenuating system comprising a number of modules and a mounting structure for the module(s), each module comprising a container having a base and at least one sidewall, the module further comprising a lid which is releasably securable to the container, the lid and the base having apertures to allow the passage of water therethrough,
  • ⁇ iv ⁇ providing a composite unit comprising a water-absorbent material between a water permeable top layer and a water permeable bottom layer, and inserting the composite unit into the container, and
  • Fig.1 shows an exploded side-sectional view of a part of the water attenuation system according to the invention
  • Fig.2 shows a plan view of the container of a module of the water attenuation system
  • Fig.3 shows a plan view of the lid of a module of the water attenuation system.
  • the water attenuation system 10 comprises a number of modules 12 (only one of which is shown in Fig.1 ) and a mounting structure 14 for the module(s).
  • the mounting structure 14 is adapted for securement to a building or the like, for example the roof 16 of a building. It will be understood that the fitment of structures to the roofs of buildings must be carefully controlled to ensure the integrity of the roof, both for new-build and existing buildings. Suitable mounting structures are available for the fitment of solar panels for example, and the present invention utilises a similar mounting structure (although other mounting structures which are unique to the water attenuation system could be used if desired).
  • the mounting structure comprises a number of channels 14 which are secured to the roof by adhesive, or by suitable fasteners at chosen locations.
  • the channels 14 will typically be directed across the roof (so that both ends of the channel are at approximately the same height) but the channels can be directed up/down the roof if desired.
  • the channels 14 are sufficiently secure to withstand the maximum expected force which will be placed upon the system by high winds, plus a desired tolerance.
  • each module 12 is connected to three channels 14. Whilst the connection to two channels 14 might be sufficient in some applications, the embodiment shown is desirable because it allows neighbouring modules to be offset if desired, which is expected to increase the integrity of the installed water attenuating system.
  • Each module has a length I and a width w as shown in Fig.2. It will be understood that the length of the channels 14 (i.e. into and out of the page as viewed in Fig.1 ) is significantly longer than the width w, and it is intended that each channel 14 is continuous across the area to be covered by the water attenuating system. It is therefore expected that the installer will first choose the area of the building (roof) which is to be covered by the water-attenuating system and will secure the required number of channels 14 across the whole of that area. The individual modules 12 can then be individually fitted to the series of channels in their chosen array. The array of modules may be continuous across the chosen area, or there may be selected gaps left in the array to allow access for the subsequent repair or replacement of parts of the system. In one embodiment the length I is approximately 1 .2 m and the width w is approximately 0.6 m, these dimensions providing a module 12 which can readily be transported to the site of use, and which can be lifted and installed by one person.
  • Each module comprises a container 20 having a base 22 and at least one sidewall 24.
  • the modules are substantially rectangular in plan view and the container has four linear sidewalls 24.
  • Non-rectangular modules may be provided if desired, but it is desirable that they are of a shape which allow complete coverage (tessellation) of a chosen area.
  • a water-absorbent material 30 within the container 20 there is a water-absorbent material 30.
  • the water-absorbent material is SAF in the form of a fibrous mat. The fibrous mat has little structural integrity and so to prevent the water-absorbent material being washed away over time it is located between two sheets or layers 32, 34 of water-permeable textile material.
  • the layers 32, 34 of water-permeable textile material are stitched together around their periphery so that the layers 32, 34 and the water- absorbent material together form a composite unit 36 which can readily be inserted into, and removed from, the container 20.
  • the composite unit 36 is retained within the container by a lid 40 which is secured by way of fasteners 42 which pass through respective holes 44 (Fig.3) in the lid and into the threaded holes 46 (Fig.2) in the sidewalls of the container 20.
  • the modules 12 are secured to the channels 14 by way of respective fasteners in the form of bolts 50.
  • the bolts 50 each carry a washer 52 and a spacer 54 and are threaded into a captive nut 56 located within the channel 14.
  • the channels 14 accommodate and retain the respective nuts 56 and yet allow the nuts 56 to slide along the channel to a chosen position.
  • the base 22 is separated from the roof 16 by the channels 14, and so air can flow underneath the base 22 without the provision of spacers (i.e. into and out of the paper as drawn in Fig.1 ).
  • the spacers 54 are provided to raise the base 22 above the channels 14 and allow air flow underneath the base 22 in the left to right direction (as drawn in Fig. 1 ) also.
  • the container 20 does not have holes for the bolts 50. Instead, the container 20 has four quarter-circular cut-outs 60, one at each corner, and two semi-circular cut-outs 62, one along each of its longer sidewalls 24. It will be understood that when an array of modules 12 are placed alongside one another, four adjacent quarter-circular cut-outs 60 can provide a circular hole for a bolt 50, and two adjacent semi-circular cut-outs 62 can provide a circular hole for a bolt 50.
  • each module can be secured to the mounting structure by individual fasteners passing through dedicated holes in the module, but the arrangement shown is preferred as each bolt 50 can secure more than one module, and it is expected to be easier to install the system by sliding modules successively into position in the chosen array.
  • the base 22 of the container 20 has a part-circular recess 64 surrounding each of the part-circular cut-outs 60, 62, the recesses 64 being provided to accommodate and locate the end of a respective spacer 54.
  • the length of the spacer 54 is chosen to permit air flow between the base 22 and the roof 16 in the installed system, air flowing underneath the modules being an important element in encouraging evaporation from the water-absorbent material 30.
  • the lid 28 includes quarter-circular cut-outs 66 adjacent each of its corners, and semi-circular cut-outs 68 at the mid-point of each of its longer sides, the cut-outs 66, 68 corresponding in position to the cut-outs 60, 62 of the container 20.
  • the lid 40 therefore uses different fasteners 42 than the fasteners 50 for securing the container 20 to the mounting structure 14, and it is not necessary to loosen or remove any of the bolts 50 in order to remove the lid 40.
  • the lid 40 can be removed by way of the fasteners 42 without affecting the structural integrity or securement of the containers 20.
  • a filter layer can be inserted into the container 20 above the top layer 32 (and below the lid 40).
  • a filter layer might be appropriate in urban and/or highly polluted areas to capture pollution and particulates before they pass into the water-absorbent material 30. It will be seen from Fig.1 that the water-absorbent material 30 does not completely fill the container 20, and there is a pathway for rainwater to flow directly through the module (represented by the arrow 70 in Fig.1 , and see also the representation of the composite unit 26 shown in dotted outline in Fig.2). This has two benefits.
  • the installer can remove the lid 40 and simply insert the composite unit 36 into the container 20.
  • it allows a proportion of the rainfall to pass directly to the drainage system (not seen), even during periods of heavy rainfall.
  • the inventors have appreciated the advantage in providing a water attenuation system which does not capture all of the rainfall. If such a system is provided, with a water-absorbent material which is able to store 5 mm of rainfall, it will be effective in preventing localised flooding provided that the rainfall event does not exceed 5 mm. As soon as the water-absorbent material has been filled with the first 5 mm of rainfall, however, all subsequent rainfall will flow into the drainage system, and flooding will occur if the subsequent rainfall is sufficient to overwhelm the drainage system.
  • the drainage system will be unused for the first 50 minutes, and then must accommodate 1 mm of rainfall in the next 10 minutes.
  • a system which allows some of the rainfall to pass directly to the drainage system can be more effective because the drainage system is being utilised throughout the period of rainfall.
  • a system which allows 20% of the rainfall to flow directly to the drainage system will result in approximately 4.8 mm being stored within the water-absorbent material, and approximately 1 .2 mm passing to the drainage system.
  • the drainage system must accommodate the excess 1 .2 mm of rainfall over the period of 1 hour, so that the peak flow rate is much reduced, and the likelihood of a flood is also much reduced.
  • the amount of rainfall which the system can absorb and temporarily store will depend upon the amount (thickness) of water absorbent material present in each module 12, and can be varied to suit each particular application.
  • the permeability of the top layer 32 and the permeability of the bottom layer 34 can be varied to suit the application. Roofs connected to a high capacity drainage system might for example be configured to allow a greater proportion of rainfall to pass directly to the drainage system, whereas roofs connected to a low capacity drainage system might be configured to capture more of the rainfall (and more rainwater overall).
  • the water authorities are aware of the average rainfall in each area, and also the likelihood of heavy rainfall (which are classed as 1 in X-year events (e.g. 1 in 10-year events or 1 in 100-year events, depending upon their severity).
  • the designer of a particular water attenuating system will typically determine the capacity of the drainage system connected to the roof, and the area of the roof of a building which needs to be covered by the water attenuating system. It can therefore be determined that the rain falling on the uncovered area of the roof, plus the proportion of rainwater which can pass directly through the modules 12, do not overwhelm the drainage system for the expected rainfall events.
  • the amount of water absorbent material which is to be used in each module can also be determined according to the rainfall events which the system is designed to accommodate.
  • the permeability of the top layer 32 differs from that of the bottom layer 34. Ideally, the permeability of the top layer is greater than that of the bottom layer. In preferred embodiments the permeability (or porosity) of the top layer 32 is around 70- 100% (i.e. the top layer allows 70-100% of rainwater to pass through it) and the permeability of the bottom layer 34 is around 1 -20%. During rainfall the top layer 32 will therefore allow substantially all of the rainwater to pass through, whereas the bottom layer 34 will retain most or all of the water and allow it to be absorbed by the water- absorbent material.
  • the rate of water flow might be too great to allow it to be absorbed directly by the water-absorbent material and the function of the bottom layer 34 is to slow down the escape of water sufficiently for most or all of the water to be absorbed.
  • the bottom layer should not be impermeable, however, as it is desired to encourage evaporation of the captured water through the bottom layer.
  • top layer 32 and the bottom layer 34 are ideally made from needle-punched polypropylene or polyethylene geotextile material. Also, as above indicated, it is not necessary or intended to prevent the direct passage of rainwater through the module 12, so that a small amount of rainwater passing through the bottom layer before it is captured by the water-absorbent material is not disadvantageous. Also, top layer 32 could be coloured black in order to be warmed by sunlight and thereby encourage evaporation. There is little or no practical advantage in colouring the bottom layer 34, however, and the use of different colours for the top layer 32 and bottom layer 34 will help to ensure that the composite unit 36 is corrected oriented within the module 12.
  • the base 22 and lid 40 have relatively large apertures to allow the passage of water therethrough.
  • the apertures 72 in the lid 40 are particularly large as they seek to ensure that water droplets (nor a water film) do not form upon the lid and block the apertures.
  • the size of the apertures 74 in the base 22 is less important in this respect, but since it is intended to encourage evaporation through the base 22 the apertures 74 are as large and numerous as is practical, bearing in mind that the base 22 must be able to support the weight of the water-absorbent material 30 when fully loaded with water.
  • Fig.1 Whilst the embodiment shown in Fig.1 has solid sidewalls 24, one or all of the sidewalls will ideally be apertured or perforated to encourage evaporation therethrough.
  • a solar panel in the form of a photovoltaic cell may be mounted to the system, for example being mounted upon a post which is secured by a chosen bolt (or bolts) 50 and projecting above the modules 12.
  • Electrical wires can run from the solar panel and through the container in order to heat electrically the water- absorbent material and increase evaporation.
  • the post can if desired carry a battery and a controller so that the battery can be charged up during the day when the sun is shining and the electrical current can be turned on and off as desired, perhaps to encourage evaporation during the hours of darkness.
  • the container 20, lid 40, channels 14 and spacers 54 are ideally of plastics materials so as to minimise the weight of the water attenuating system.
  • a known application comprising a tessellated array of modules 12 weighs around 20-30 kg/m 2 . This compares with a green roof which will typically weigh around 80-100 kg/m 2 (these being the respective weights when fully wet).
  • the present invention is therefore suitable for a much greater number of roofs, including importantly those which would not be able to support the weight of a green roof.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Building Environments (AREA)
  • Roof Covering Using Slabs Or Stiff Sheets (AREA)

Abstract

La présente invention concerne un système d'atténuation d'eau et un procédé d'atténuation d'écoulement d'eau de pluie, destinés particulièrement, mais pas exclusivement, à des toits de bâtiments et/ou d'autres structures fixes. Le système (10) comprend un nombre de modules (12) et une structure de montage (14) du ou des modules. La structure de montage est conçue pour une fixation à un bâtiment, ou analogues (16). Chaque module comprend un récipient (20) comportant une base (22) et au moins une paroi latérale (24), le module comprenant en outre un couvercle (40) qui peut être fixé de manière libérable au récipient. Un matériau hydro-absorbant (30) est situé à l'intérieur du récipient (20) entre une couche supérieure perméable à l'eau (32) et une couche inférieure perméable à l'eau (34). Le couvercle et la base comportent des ouvertures (72, 74) laissant passer l'eau. Le système comprend un certain nombre d'éléments d'espacement (54) entre la structure de montage (14) et le récipient (20) destinés, lorsqu'ils sont utilisés, à séparer la base (22) du bâtiment. L'invention concerne également un procédé d'atténuation d'écoulement d'eau de pluie.
PCT/GB2014/052517 2013-08-16 2014-08-15 Système d'atténuation d'eau et procédé d'atténuation d'écoulement d'eau de pluie WO2015022550A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14758617.6A EP3033459A1 (fr) 2013-08-16 2014-08-15 Système d'atténuation d'eau et procédé d'atténuation d'écoulement d'eau de pluie

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB1314726.9A GB201314726D0 (en) 2013-08-16 2013-08-16 A water attenuating roofing system
GB1314726.9 2013-08-16

Publications (2)

Publication Number Publication Date
WO2015022550A1 true WO2015022550A1 (fr) 2015-02-19
WO2015022550A8 WO2015022550A8 (fr) 2015-09-24

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EP (1) EP3033459A1 (fr)
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Cited By (2)

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Publication number Priority date Publication date Assignee Title
IT202000024904A1 (it) * 2020-10-22 2022-04-22 Pier Giuseppe Marcon “pannello di rivestimento”
WO2022144108A1 (fr) * 2020-12-30 2022-07-07 Rockwool International A/S Système de toit

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