Thermal insulation device for a wall or roof comprising a support structure and a thermal insulation

Abstract

The invention relates to a thermal insulation device (10) for a wall envelope (9) or a roof (4) of a building and comprising for this purpose at least one rigid support structure (20) intended to be attached to a load-bearing element (6; 7;8) of said wall envelope (9) or of said roof (4) and thermal insulation (30) carried by said support structure (20), characterized in that the thermal insulation (30) comprises at least one flexible outer envelope containing an insulating material and provided around its perimeter with at least two prominent opposing attachment members, and the rigid support structure (20) comprises at least two longitudinal profiles in the general form of a rail intended to be fixed to the wall envelope (9) or the roof (4) to be insulated, said rails respectively comprising facing attachment means to each receive a longitudinal securing element adapted on the one hand to be inserted removably into the respective opposing attachment members of the flexible outer envelope and on the other hand to cooperate with said attachment means so as to attach said thermal insulation (30) to the rigid support structure (20).

Description

Technical field of the invention

[0001] The present invention relates to the thermal insulation of buildings such as dwellings, offices, shops or private or public industrial buildings. Previous technique

[0002] In the field of construction or renovation of buildings with an exposed or semi-exposed structure (metal, wood or concrete frame), it is useful or even necessary to insulate the walls that may allow heat or cold to pass / transmit from the outside to the inside and vice versa, in particular to provide living / working comfort for people and / or to save the energy used to cool or heat the inside of these buildings.

[0003] Many solutions already exist, such as the use of semi-rigid sheets based, for example, on polystyrene (extruded or expanded), rolls of natural fibers (glass, rock), multi-layer thin films, bales of straw or natural wool, or the projection of powdered or flake materials.

[0004] There are also thermal insulation systems known as "external" which may require a repair of the waterproofing.

[0005] An example of a thermal insulation device is known from DE 199 50 139 B4.

[0006] Current solutions are still impractical and quick to install, not versatile enough and easily adaptable to all types of buildings, or unsuitable for renovating existing buildings that are not insulated or are very poorly insulated from the inside without having to carry out structural reinforcement.

[0007] Moreover, from an aesthetic and / or acoustic point of view, current solutions are not yet entirely satisfactory. Présentation de l'invention

[0008] The present invention aims to remedy these drawbacks with a totally innovative approach and a simple, lightweight, adaptable / versatile and efficient solution.

[0009] Accordingly, in a first aspect, the present invention relates to a thermal insulation device according to claim 1.

[0010] This solution allows for easy, reliable, quick, and highly versatile installation of thermal insulation for walls or roofs, with the insulation also being replaceable in certain situations due to the removable nature of the fastening elements.

[0011] The invention is implemented according to the embodiments and variants set out below, which are to be considered individually or in any technically feasible combination.

[0012] Advantageously, the attachment devices of the flexible outer envelope consist of tabs folded back on themselves in the shape of a handle and having an opening adapted to receive said longline securing element.

[0013] This solution is simple to implement and operate by the person installing it.

[0014] According to a preferred embodiment of the present invention, the longline securing element is a straight rod with a constant cross-section, preferably circular, and the opening of each attachment member includes a hollow tube of the same cross-section as the rod in order to receive the latter.

[0015] This solution is simple to design, reliable and practical.

[0016] According to the invention, the rigid support structure consists of two metal rails intended to be fixed firmly in parallel to each other on the wall envelope or the roof of the building to be insulated, each means of attaching a rail considered being made up of different portions of metal folded locally relative to each other on themselves to form a longitudinal channel for receiving said longline safety element.

[0017] In addition, each longitudinal rail is presented in the form of a central strip provided locally, along at least one of its two opposite longitudinal edges, with hooking means each formed by a transverse extension of material extended by a first fold at approximately 90° forming a first portion extended by a second internal fold at approximately 90° forming a second portion, so that the transverse extension, the first fold and the second fold define a U-shaped channel.

[0018] According to a particular embodiment of the present invention, the second fold is extended by a third fold at approximately 90° directed opposite the central band to form a prominent "L" shaped wing erected perpendicularly to said central band.

[0019] According to a particularly interesting aspect of the present invention, the two longitudinal edges of each metal rail are each provided with hooking means assembled in pairs whose respective "U" shaped channels face each other.

[0020] This solution allows thermal insulation to be installed on both sides of the same rail to cover a larger area.

[0021] In addition, each metal rail is provided with several pairs of longitudinally extending fastening means, with a space measuring at least the width of one fastening element being provided between the channels of two consecutive fastening means.

[0022] This solution allows for better attachment of the thermal insulation to its support structure by distributing the attachment forces and / or covering large wall / roof dimensions to be insulated.

[0023] In addition, each flexible outer layer of thermal insulation includes a multitude of attachment devices, each cooperating with an inter-duct space.

[0024] Advantageously, the longitudinal rail is covered with a thermal break, such as a felt strip.

[0025] In one particular aspect, the thermal break is a felt strip covered with a sheet metal and held laterally in place by pairs of material studs made on the longitudinal rail.

[0026] Preferably, said thermal insulating material is of the blown type and the flexible outer envelope is a membrane or a flexible fabric, preferably plasticized to be easily cleaned and fire resistant to class M0 or M1, the whole taking substantially the form of a parallelepiped-shaped cushion.

[0027] The present invention also relates to a thermal insulation method for a building wall or roof, using the thermal insulation device according to the first aspect of the invention, and consisting of: to firmly fix at least two longitudinal profiles opposite each other on the wall or roof envelope to be insulated, insert a first long, narrow securing element into a first fastening member of the flexible outer envelope, insert the first long, narrow securing element into the corresponding attachment means of a first longitudinal profile, insert a second long, narrow securing element into a second fastening member of the flexible outer envelope opposite the first fastening member, exert a tensile force on the second long, narrow securing element substantially perpendicular to its elongation direction in order to make it penetrate an attachment means of the second longitudinal profile by pulling on the fastening members of the flexible outer envelope,and release the tensile force exerted on the second longitudinal securing element once the latter is correctly positioned and locked in the attachment means of the second longitudinal profile. Brève description des figures

[0028] Other advantages, purposes and features of the present invention will become apparent from the following description, given for explanatory purposes and in no way as a limitation, with reference to the accompanying drawings, in which: [ Fig. 1 ] there figure 1 is a perspective view of a room comprising at least one side wall and a roof structure to be thermally insulated, [ Fig. 2 ] there figure 2 is a perspective view of a metal rail belonging to a thermal insulation device according to the present invention, [ Fig. 3 ] there figure 3 is a perspective view of the rail of the figure 2 fixed under an L-shaped beam of the roof frame figure 1 , [ Fig. 4 ] there figure 4 is a front view of the figure 3 , [ Fig. 5 ] there figure 5 is a perspective view of a cushion-shaped thermal insulator belonging to the device according to the present invention, [ Fig. 6 ] there figure 6 is a perspective view of a long, rod-shaped securing element belonging to the device according to the present invention, [ Fig. 7 ] there figure 7 is a perspective view of a handle-shaped positioning tool belonging to the device according to the present invention, [ Fig. 8 ] there figure 8 is a perspective view of the first stage of attaching the cushion of the figure 5 on a rail of the figure 2 , [ Fig. 9 ] there figure 9 is a side view of the figure 8 , [ Fig. 10 ] there figure 10 is a detailed view of the figure 8 with the handle in use, [ Fig. 11 ] there figure 11 is a perspective view of a second stage of attaching the cushion of the figure 5 on a second rail fixed to a second beam, [ Fig. 12 ] there figure 12 is a front view of the figure 11 , [ Fig. 13 ] there figure 13 is a detailed perspective view of the figure 11 with the handle in use, [ Fig. 14 ] there figure 14 is a perspective view of a rail of the figure 2 fixed under a Z-beam, [ Fig. 15 ] there figure 15 is a front view of the figure 14 , [ Fig. 16 ] there figure 16 is a perspective view of a cushion suspended from two rails fixed under two Z-beams, [ Fig. 17 ] there figure 17 is a front view of the figure 16 , [ Fig. 18 ] there figure 18 is an exploded perspective view of a variant implementation of the rail of the figure 2 , [ Fig. 19 ] there figure 19 is a perspective view of the figure 18 , [ Fig. 20 ] there figure 20 is an interior perspective view of a room, one wall of which is equipped with a thermal insulation device according to the present invention. Description des modes de réalisation

[0029] Firstly, the present description is given without limitation, each characteristic of an embodiment being able to be combined with any other characteristic of any other embodiment described and / or represented.

[0030] It should also be noted from the outset that the figures are not necessarily to scale, without this hindering their understanding.

[0031] There figure 1 represents a part 1 intended to receive a thermal insulation device 10 according to the present invention. This part 1, for example a warehouse or an industrial building, typically includes a floor 2, at least one side wall 3 and a roof frame 4 comprising in particular several transverse purlins 5 (e.g., wall plate, ridge and intermediate purlins) on which rafters 6 are fixed perpendicularly, which may or may not support transverse battens parallel to the purlins.

[0032] In the description that follows, the insulation device 10 is adapted to be hung under these rafters 6, but it can just as easily be installed in other places in the room, for example along vertical beams 7 or horizontal beams 8 of a partition 9. The transverse purlins 5, rafters 6 and vertical beams 7 can be made of wood or metal (galvanized steel, zinc), or wood, depending on the type of framework and building on which the thermal insulation device 10 is to be installed.

[0033] As can be seen on the figures 2 à 6 , the thermal insulation device 10 comprises at least two main elements, namely a support structure 20, intended to be firmly fixed to the rafters of the frame 4 considered, and a cushion-shaped thermal insulator 30 intended to be removably attached to said support structure 20.

[0034] More specifically, the rigid support structure 20 comprises at least two longitudinal metal profiles 21 (stainless steel or galvanized steel for example) each in the general shape of an elongated rail measuring a few centimeters in width (once formed after bending), typically between about 5 and about 12 centimeters and preferably between about 6 and 8 centimeters, over several tens of centimeters in length, typically between about 1 meter and more than 2 meters, depending on the size of the thermal insulation 30 to be hung and the dimension / spacing of the rafters 6 where the device 10 will be fixed.

[0035] In the present case, each elongated rail 21 has a flat longitudinal central strip 22 of metal measuring approximately 40 millimeters wide by approximately 1 to 2 millimeters thick. This central metal strip 22 is provided locally, along two opposing longitudinal edges 23, with a series of fastening means 24 initially formed, that is, before folding, by two pairs of extensions (protrusions) projecting laterally from the central strip 22 and facing each other, each extension measuring approximately 150 millimeters long by approximately 51 to 52 millimeters wide and thus extending on either side of said main strip 22. Each profile 21 therefore measures locally (at the location of the fastening means 24) approximately 142 to 144 mm wide before the successive foldings described below.

[0036] More specifically, each attachment means 24 is formed by a lateral / transverse extension 25 of material measuring approximately 12 millimeters wide, extended by a first fold at approximately 90° forming a first portion 26 measuring approximately 12 millimeters high, extended by a second internal fold, also at approximately 90°, forming a second portion 27 measuring 12 millimeters wide in order to form a U-shaped channel G intended to receive a long, narrow safety element 40 (see figure 6 ), said second portion 27 being then extended by a third fold 28 at 90°, directed opposite the central band 22, to form a prominent wing in the shape of an "L" erected perpendicular to said central band 22 and measuring approximately 15 millimeters in height.

[0037] Two facing attachment means 24 provided on the two opposite lateral edges 23 thus form a pair, the respective "U" shaped openings of the chutes G of each attachment means 24 then face each other to receive each a metal rod 40.

[0038] In the end, the profile 21 equipped with its various pairs of facing attachment means 24 measures approximately 64 millimeters in width and approximately 27.8 millimeters in height (overall thickness).

[0039] The pairs of fastening means 24 are spaced longitudinally, preferably at regular intervals, by a gap 24b of a few centimeters, for example about 10 to 15 centimeters. There can be as many pairs of fastening means 24 as desired per longitudinal profile 21.

[0040] Through holes 12 are provided in the central band 22, at the level of the different pairs of fastening means 24, for fixing the longitudinal profile 21 (for example by screwing, nailing, or riveting, supplemented if necessary by gluing) onto a lower face 6b of the corresponding beam 6, as illustrated by the figures 3 And 4 , the attachment means 24 are then all oriented towards the ground 2 (in the case of fixing on a vertical beam 7, the attachment means are oriented towards the inside of the room 1).

[0041] Thermal insulation 30 shown on the figure 5 It comprises a flexible outer casing 31, for example a canvas or coated (plasticized) fabric membrane for easy cleaning and fire resistance of class M0 or M1, essentially taking the form of an individual parallelepiped-shaped cushion. The flexible outer casing 31 is filled with blown insulating material of a known type (not shown).

[0042] The flexible outer casing 31 is further provided around its perimeter 32 with several prominent attachment points 33 arranged oppositely and consisting of tabs 34 preferably made of the same resistant fabric as the outer casing 31, these tabs 34 being folded back on themselves and sewn onto the flexible outer casing 31 to form handles / loops. Each handle 34 thus has an internal passage 35 adapted to receive a long, slender safety element 40 in the form of a metal bar of constant cross-section, for example round or square (see figure 6 ).

[0043] The opening 35 of each handle 34 is fitted with a rigid tube 36, for example, a PVC tube bonded to the fabric, acting as reinforcement and, more importantly, as a guide and support sleeve for the rod 40 designed to be inserted inside all of these tubes. Thus, as will be described in more detail later, the metal rod 40 can be easily inserted into the various handles 34 without damaging them (risk of tearing the fabric by the metal), by passing through each of the tubes 36. These tubes also allow for a better distribution of the pulling force required to pull on the handles 34.

[0044] For this purpose, a tool for installing the thermal insulation cushion 30 on the longitudinal rails 21, notably by traction, is shown on the figure 7 This tool 50, halfway between a handle and a lever, comprises a rigid, flat, perforated metal structure having first pushing means 51 at a first end 50a and second pulling means 52 at a second opposite end 50b. More specifically, the first pushing means 51 comprise two spaced pairs of fingers 53 and 54 spread apart and facing each other parallel to form a kind of clamp, while the second pulling means 52 comprise folding portions 55, 56 and 57 forming a kind of hook.

[0045] A method for installing the thermal insulation device 10 of figures 2 , 5 And 6 of the present is illustrated by the figures 8 à 13 . In the case shown, the flexible outer casing 31 has a shape adapted so that the thermal insulation 30 is wedged between the webs of the IPE 6 beams. For this purpose, the flexible outer casing 31 has a lateral notch 31a and a lateral protrusion 31b on each of its attachment sides, i.e. where the handles 34 are located.

[0046] More specifically, in a first step, the installer fixes two longitudinal rails (profiles) 21, identical in this case, fixed under the lower face 6b of two adjacent IPE 6 metal beams so as to form the rigid support structure 20 of the thermal insulation device 10. Preferably, the installer fixes longitudinal rails 21 along all the beams 6 in order to cover the entire underside of the roof 4 to be thermally insulated.

[0047] The distance between two consecutive longitudinal rails 21 is substantially identical to the median distance D between two adjacent beams 6, which distance D is slightly greater than the width L of the external flexible envelope 31 of the thermal insulation 30.

[0048] It should also be noted that the dimension of the spacing between the first portions 26 of two adjacent longitudinal rails 21 is slightly less than the distance T between virtual axes XX passing through the opposite tubes 36 of the same thermal insulation 30 in order to be able to install the latter in the hooking means 24.

[0049] A first long, narrow security element 40 ( figure 6 ) is inserted into all the tubes 36 on one side of the flexible outer casing 31. It should be noted that in this state, the longitudinal axis of the metal rod 40 is aligned with the axis XX' of said first tubes 26. The assembly thus formed is brought close to a first longitudinal rail 21 (the one on the left on the figures 8 à 10 ) and the two clamps 53 / 54 of the first thrust means 51 of the assembly tool 50 allow the entire rod 40 to be correctly positioned inside the U-shaped channel G (parts 25, 26 and 27) of the various attachment means 24 (large arrow of the figure 10 ), the handles 34 being placed in the voids 24b of said longitudinal rail 21 while the clamps 53 / 54 are positioned on either side of said handle considered.

[0050] Thanks to a pivoting motion (arrows illustrating rotation of the figure 10 ) exerted by the assembly tool 50, which at this moment supports the entire metal rod 40 and also the thermal insulation 30, said rod 40 is placed at the bottom of the fastening means 24, that is to say against the first folding wall 26, and remains stuck there.

[0051] Depending on the length of the longitudinal rail 21 and the number of attachment points 24 arranged along it, it is advisable to use several mounting tools 50 spaced apart simultaneously to insert the metal rod 40 into the U-shaped channels provided for this purpose. Two installers can thus work together if necessary. The flexible outer layer 31 of the thermal insulation is then attached / suspended under a first longitudinal rail 21 of a first IPE 6 beam, as illustrated by the figures 8 And 9 .

[0052] In a subsequent step illustrated by the figures 11 à 13 (end of said step), a second longline securing element 40 (metal rod) is first inserted into all the tubes 36 on a second opposite side of the flexible outer casing 31. It should be noted in this regard that the longitudinal axis of the second metal rod 40 is aligned with the axis XX' of said second tubes 26.

[0053] The installer then places the mounting tool 50 around the second rod 50, positioning the traction means 52 (hooks 55, 56 and 57) behind it ( figure 13 ), then he rotates the flexible outer casing 31, thus equipped with its second metal rod 50, around the first metal rod 50 (which therefore acts as a pivot) using said tool 50, as illustrated by arrow R in the figure 9 , by lifting the flexible outer casing 31. Simultaneously, the installer exerts a pulling force F on the mounting tool 50, which has the effect of pulling on the handles 34 by means of the second metal rod 40 so that the latter passes behind the wall 28 of all the fastening means 24, which is made possible by the elasticity of the flexible outer casing 31 (or possibly only of its handles 34).

[0054] Once the second metal rod 50 has passed the various folding walls 28 and is positioned with regard to the U-shaped channels of the attachment means 24 (folding walls 26 and 27), the user can release their pulling force F so that said metal rod 40 comes to rest of its own accord against the first folding wall 26 of said U-shaped channels G, exerting tension on the handles 34 of the flexible outer casing 31, allowing the thermal insulation 30 to remain in position ( figure 11 And 12 ) by being "stretched" between two adjacent longitudinal rails. The retention of the thermal insulation 30 in this position is also ensured by the lateral protrusions 31b which are placed against the central webs of the IPE 6 beams, as illustrated by the figures 9 then 11 and 12. The thermal insulation 30 therefore cannot fall back to the ground.

[0055] Thus, a first section of the roof 4 can be easily thermally insulated. The installer repeats these steps as many times as necessary to attach additional thermal insulation 30 between the IPE beams 6. It should be noted that each thermal insulation 30 is independent of the others and can be removed, if necessary, by pulling (arrow F) using one or more mounting tools 50 on one of the two metal rods 40 to pull it out of the U-shaped channels of the attachment means 24 and return it to the position illustrated, for example, by the figure 8 .

[0056] According to the embodiment illustrated by the figures 14 à 17 The thermal insulators 30 are attached to longitudinal rails 21 fixed under so-called "Z-shaped" profiles, transverse purlins 5, or vertical posts by any known means (screws or rivets, for example). The installation method for the thermal insulators 30 of the device 10 according to the present invention is similar to that described above.

[0057] According to an improvement illustrated by the figures 18 And 19A thermal break strip 60, for example a Phaltex® type felt strip 61, can be placed against the central band 22 of each longitudinal rail 21 and held in place by means of a longitudinal plate 62, thus further reducing any potential heat loss. The retaining plate 62 has slots 63 for the passage of the third folded sections 28 of the associated longitudinal rail 21. It should also be noted that the felt strip 61 is held laterally in place by pairs of studs 29 formed on the central band 22 of the metal longitudinal rail 21.

[0058] Finally, the figure 20 illustrates a thermal insulation device 10 according to the present invention mounted between horizontal uprights 8 of a vertical partition 9, the longitudinal rails 21 of the support structure 20 being in this case mounted horizontally so that the thermal insulation 30 is totally vertical.

[0059] The advantages of the present invention include the following: Simplicity: Only five components: 21 folded sheet metal profiles - 40 longitudinal safety element - 31 flexible outer envelope in the form of a membrane or fabric - blown thermal insulation - small screws; Interior installation, therefore unaffected by weather conditions; Lightweight elements requiring only two installers; and Rapid and scalable implementation by zone, with very limited and temporary disruption to walls / roof. Lightweight: 5 to 10 kg / m², installation without structural calculation verification for buildings built before 1995, for those built after, verification of available structural calculations (DOE for buildings less than 30 years old); and Installation facilitated by the lightness of the elements. Adaptability: Installation under pitched or flat roofs, and on perimeter walls; Longitudinal profiles compatible with concrete, wood, metal, etc. framing.; Span of approximately 1.20 to 3.00 m, depending on requirements; Allows for continued attachment under and / or against the frame for existing buildings; and Use in new construction with the same advantages. Performance: R = 5.2 W / m² / °C minimum up to R = 8.4 W / m² / °C, depending on the span, for thermal insulation under roofs and / or walls; Acoustic insulation against airborne noise from inside and outside; Improved interior acoustics, including a reduction in reverberation; Flexible, easily cleanable outer membrane or fabric, with a possible fire rating of M0 or M1; and Lifespan > 20 years.

[0060] It must be clearly understood that the detailed description of the object of the Invention, given solely by way of illustration, does not in any way constitute a limitation, the technical equivalents also being included in the scope of the present invention as defined by the attached claims.

[0061] Thus, the metal profiles forming the rails can be made of galvanized steel lacquered in color (all possible colors).

[0062] The flexible outer casing may have a colour or a structured appearance (visible weave pattern for example), to improve the aesthetics of the insulation device.

[0063] More expensive decorative variants can be used for commercial premises, laboratories, offices, multipurpose rooms, sports halls, etc.

[0064] The dimensions indicated are only indicative and may vary, in particular the length of the longitudinal metal profiles and the flexible outer envelopes, the dimensions of the different folds (while retaining the overall shape shown), the thickness of the sheet metal used, the number and / or spacing of the attachment means, the number and / or spacing of the handles, etc.

Claims

1. Thermal insulation device (10) for a wall shell (3; 9) or a roof (4) of a building and comprising for this purpose at least one rigid support structure (20) intended to hook onto a load-bearing element (6; 7; 8) of said wall shell (3; 9) or of said roof (4) and a thermal insulator (30) carried by said support structure (20), - the thermal insulation (30) comprising at least an external flexible shell (31) containing insulating material and provided around its perimeter with at least two opposing protruding attachment members (33), and - the rigid support structure (20) comprising at least two longitudinal profiles (21) in general rail form intended to be fastened to the wall shell (3; 9) or the roof (4) to be insulated, and at least two elongate securing elements (40), said rails (21) respectively comprising hooking means (24) facing each other for each receiving one of said two elongate securing elements (40) adapted on the one hand to be removably inserted into the respective opposite attachment members (33) of the flexible outer shell (31) and on the other hand to cooperate with said hooking means (24) so as to hook said thermal insulator (30) onto the rigid support structure (20) following a traction action exerted on said attachment members (33) using said elongate securing element (40) in order to make the latter penetrate into the hooking means (24) to be held therein characterised in that the rigid support structure (20) consists of two metal rails (21) intended to be firmly secured parallel to each other on the wall shell (3; 9) or the roof (4) of the building to be insulated, each hooking means (24) of a relevant rail (21) consisting of various portions of metal (25, 26, 27) locally folded relative to each other upon themselves to form a longitudinal channel (G) for receiving said elongate securing element (40).

2. Device (10) according to claim 1, characterised in that the attachment members (33) of the flexible outer shell (31) consist of lugs (34) folded over themselves in the shape of a handle and having an opening (35) adapted to receive said elongate securing element (40).

3. Device (10) according to claim 2, characterised in that the elongate securing element (40) is a straight rod of constant cross-section, preferably circular, and the opening of each attachment member (33) comprises a hollow tube (36) with the same cross-section as the rod (40) in order to receive the latter.

4. Device (10) according to any one of claims 1 to 3, characterised in that each longitudinal rail (21) is in the form of a central strip (22) locally provided, along at least one of its two opposite longitudinal edges (23), with hooking means (24) each formed by a transverse material extension (25) extended by a first fold at approximately 90° forming a first portion (26) extended by a second internal fold at approximately 90° forming a second portion (27), such that the transverse extension (25), the first fold and the second fold (37) define a U-shaped channel (G).

5. Device (10) according to claim 4, characterised in that the second fold (27) is extended by a third fold (28) at approximately 90° directed opposite to the central strip (22) to form an L-shaped protruding wing standing perpendicular to said central strip (22).

6. Device according to claim 5, characterised in that the two longitudinal edges (23) of each metal rail (21) are each provided with hooking means (24) gathered in pairs, the respective U-shaped channels (G) of which face each other.

7. Device (10) according to claim 6, characterised in that each metal rail (21) is provided with several pairs of hooking means (24) extending longitudinally, a space (24b) measuring at least the width of an attachment member (33) being provided between the channels (G) of two consecutive hooking means (24).

8. Device (10) according to claim 7, characterised in that each flexible outer shell (31) of a thermal insulator (30) comprises a multitude of attachment members (33) each cooperating with a space (24b) between the channels (G).

9. Device according to any one of the preceding claims, characterised in that the longitudinal rail (21) is covered with a thermal breaker (60), such as a felt strip (61).

10. Device according to the preceding claim, characterised in that the thermal breaker (60) is a felt strip (61) covered with a metal sheet (62) and held laterally in place by pairs of studs of material (29) formed on the longitudinal rail (21).

11. Device according to any one of the preceding claims, characterised in that the said thermal insulating material is of the blown type and the external flexible shell (31) is a membrane or a flexible fabric, preferably plasticised to be easily cleanable and class M0 or M1 fire-resistant, the whole substantially taking the form of a parallelepipedal-shaped cushion.

12. Method of thermal insulation for a wall shell (3; 9) or a roof (4) of a building, using the thermal insulation device (10) according to any one of the preceding claims and consisting in: - firmly attaching at least two longitudinal profiles (21) facing each other to the shell of the wall or roof to be insulated, - inserting a first elongate securing element (40) into a first attachment member (33) of the flexible outer shell (31), - introducing the first elongate securing element (40) into the corresponding hooking means (24) of a first longitudinal profile (21), - inserting a second elongate securing element (40) into a second attachment member (33) of the flexible outer shell (31) opposite the first attachment member (33), - exerting a tensile force (F) on the second elongate securing element (40) substantially perpendicular to the direction of elongation thereof in order to make it penetrate into a hooking means (24) of the second elongate profile (21) by pulling on the attachment members (33) of the flexible outer shell (31), and - releasing the pulling force exerted on the second elongate securing element (40) once the latter is correctly positioned and locked in the hooking means (24) of the second longitudinal profile (21).

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