FR2882076A1 - Covering for flat or inclined roof of building, has large dimensioned and rigid honey-combed plate, made of injected/extruded polypropylene, whose cells are closed on lower side by geotextile and filled with filling material on upper side - Google Patents

Abstract

The covering has a large dimensioned and rigid honey-combed plate (1) whose cells are closed on a lower side by a geotextile (2) and are opened on an upper side. The lower side is placed on a sealing unit (3) of a roof. A filling material e.g. fine gravel, soil or sand, is introduced in the cells on the upper side. The size of the cells is comprised between 8 and 75 millimeters.

Description

Flat or inclined roofing of buildings

  The present invention relates to flat roofing or inclined roofing of building especially in the field of the development of roofs of buildings, in order to make them accessible to people and / or to plant them.

  Usually, access to the roof of a building is often limited because there are sealing problems of said roof which must be kept as good as possible. Thus in the case of flat roofs of buildings, it is often planned to protect this waterproofing by a bed of gravel: they are then said to be inaccessible. To make them accessible, it is necessary to make a specific structure of concrete or slabs, suitable to support the weight of a passer and to protect said watertightness. Indeed, moving the bed of gravel during the passage of people can hurt the seal. As a result, the development of flat terraces to make them accessible requires significant and expensive work. Most flat roofs are inaccessible and protected by a bed of gravelly poor aesthetic.

  Moreover, even a simple green roofing flat or inclined, has many problems to solve before being put in place. Indeed, it is necessary again to preserve the waterproofness of the roof but also to retain the soil and drain moisture to be able to green the roof surface satisfactorily without harming the waterproofness of the roof.

  Roof greening devices and roofing devices have been proposed for use by people, but most often these devices offer one or other of the applications but not both. In addition, these devices do not allow the transformation of an existing roof in a simple and relatively economical way.

  Indeed, one of the solutions is to pour a concrete screed which causes a consequent modification of said roof but also relatively high costs.

  In order to overcome these drawbacks, the present invention proposes a device for the construction of flat or inclined roof of building, simple to implement and offering freedom of development and use of the roof area greatly improved.

  For this purpose, the subject of the invention is a coating for a flat or inclined roof of a building, characterized in that it consists of at least one honeycomb plate such as a honeycomb, the cells of which are closed on the lower face of said plate by a geotextile and open on the opposite face, and a filling material of said cells such as chippings, earth.

  Thus, advantageously, the coating according to the invention makes it possible to preserve the tightness of the roof when it is walked on. In fact, the geotextile retains the chippings or the earth filling the cells and protects the sealing of the punching while chippings or earth locked in the cells can not be moved when walking which ensures the protection of the seal.

  According to other particular features of the invention: the honeycomb plate is preferably made of extruded or injected polypropylene.

  In the case where the granulate is gravel, the geotextile is made of woven or non-woven thermoplastic fibers of between 30 and 300 g / m 2.

  In the case where the granulate is sand, the geotextile is made of thermoplastic fibers, which may or may not be woven, with a grammage of between 30 and 100 g / m2.

  Preferably, the geotextile is the underside of the alveolar plate.

  The size of the cells is generally between 8 and 75 mm depending on the granulate placed in the cells.

  The large plates, for example 2.4 x 1.2 meters, are very difficult to handle once filled with gravel, which limits the risk of accidental or voluntary movements. The protection of the seal remains in place.

  On an aesthetic level, it is possible to combine different types of gravel with lawn or sand.

  The honeycomb plate preferably made of extruded polypropylene, has a particularly satisfactory crush resistance to allow walking or removal of decorative equipment, without risking damaging the waterproofness of the roof.

  The invention will now be described in more detail by reference to the drawings in which FIG. 1 shows a schematic sectional view of the coating according to the invention, placed on a roof. FIG. sectional view and elevation of a cell constituting the coating according to the invention placed on the roof.

  The flat or inclined building roofing has a honeycomb plate 1 such as a honeycomb.

  The cells of the cellular plate 1 are closed on one face of said plate 1 by a geotextile 2 and open on the opposite face. The face of the honeycomb plate 1 provided with the geotextile is placed on the sealing means 3 of the roof itself consisting of a concrete slab 4. The geotextile thus preferably constitutes the underside of the cellular plate 1. The core of the cells is preferably made of polypropylene. The size of these cells is generally between 8 and 75 mm and is a function of the granulate disposed in said cells.

  Through the open face of the honeycomb plate 1, a filling material is introduced into said cells.

  This filling material may be chippings whose dimensions are adapted to correctly fill said cells.

  The filler material may also be sand, earth. In the case of a greening of the roof, moisture drainage means will be provided in the coating.

  In the case of a filling material such as gravel, the geotextile is made of polyester with a basis weight of between 30 and 300 g / m2.

  In a filling material such as sand, the geotextile is made of polypropylene with a basis weight of between 30 and 100 g / m2.

  The invention therefore allows a simple and quick installation to implement roofs of buildings while preserving the essential sealing of said roofs.

  In the case of sloped roofs honeycomb plates help to retain the soil necessary for plants, the porous sub-surface coating facilitates drainage.

  The roof covering according to the invention is also suitable for roofs made of sheet metal or channel tiles for example, the rigidity of the plates to bridge the irregularities of the roof and facilitating the flow of water.

6 2882076

Claims (6)

CLAIMS -   1. Roof covering flat or inclined building, characterized in that it consists of at least one honeycomb plate (1) such as a honeycomb, whose cells are closed on the underside of said plate (1) by a geotextile (2) and open on the opposite face, and a filling material of said cells such as chippings, earth.   2. The coating of claim 1, lo characterized in that the cellular plate is preferably made of extruded polypropylene or injected.   3. The coating according to one of claims 1 and 2, characterized in that in the case where the granulate is gravel, the geotextile is made of woven or non-woven thermoplastic fibers with a basis weight of between 30 and 300 g / m2.   4. Coating according to one of claims 1 and 2, characterized in that, in the case where the granulate is sand, the geotextile is made of thermoplastic fibers woven or not with a basis weight of between 30 and 100 g / m2.   5. Coating according to one of claims 1 to 3, characterized in that the geotextile is preferably the underside of the honeycomb plate (1).   6. Coating according to one of claims 1 to 5, characterized in that the size of the cells is generally between 8 and 75 mm depending on the granulate placed in the cells.