Device for thermally insulating a building wall from the outside, and method for implementing such a device

Abstract

A device ( 2 ) for thermally insulating a building wall ( 1 ) from the outside, being applicable in particular to walls and roofs, includes, starting from the wall, a layer ( 3 ) of impermeable rigid insulation, spacers ( 4 ) and a perforated rigid facing sheet ( 6 ) at a distance from the layer ( 3 ) of rigid insulation so as to form an air gap ( 7 ) between the facing sheet and the layer ( 3 ) of rigid insulation. A layer ( 8 ) of granular insulation ( 9 ) in divided form is contained in synthetic textile bags ( 10 ) placed in the air gap ( 7 ). A method for implementing such a device is also described.

1 . Device ( 2 ) for thermal insulation from the outside of a building partition ( 1 ), in particular applicable to walls and to roofs, comprising:
 A rigid and impermeable insulation layer ( 3 ) comprising a first surface, a so-called contact surface ( 31 ), suitable for being attached to said partition, and a second surface, a so-called outer surface ( 32 ), opposite to the contact surface,   A rigid and perforated cladding plate ( 6 ),   Spacers ( 4 ) attached to said outer surface and adapted to hold said cladding plate at a distance from the outer surface and to form an air gap ( 7 ) between said cladding plate ( 6 ) and the outer surface ( 32 ) of the rigid insulation layer ( 3 ),   A layer ( 8 ) of granular insulation between the rigid insulation layer ( 3 ) and the cladding plate ( 6 ), wherein   
       the granular insulation ( 9 ) is in divided form and contained in at least one synthetic textile bag ( 10 ). 
     
     
         2 . Insulation device according to  claim 1 , wherein the synthetic textile is a non-woven synthetic textile, in particular a needle-bonded geotextile. 
     
     
         3 . Insulation device according to  claim 1 , wherein the granular insulation ( 9 ) is a porous granular insulation. 
     
     
         4 . Insulation device according to  claim 1 , wherein each bag ( 10 ) has an essentially cylindrical shape, with a diameter that is less than or equal to the distance between the outer surface ( 32 ) of the rigid insulation layer ( 3 ) and the cladding plate ( 6 ). 
     
     
         5 . Insulation device according to  claim 1 , wherein each bag ( 10 ) has an essentially parallelepiped shape and comprises partitions, so-called separation partitions ( 11 ) that are rectangular, parallel, and uniformly spaced and whose long edges are attached to the main surfaces ( 14   a ,  14   b ) of each bag so as to keep a distance that is less than or equal to the distance between the outer surface ( 32 ) of the rigid insulation layer ( 3 ) and the cladding plate ( 6 ) between said main surfaces. 
     
     
         6 . Insulation device according to  claim 1 , wherein at least one part of the textile partitions of each bag ( 10 ) is perforated. 
     
     
         7 . Insulation device according to  claim 1 , wherein the rigid insulation layer ( 3 ) comprises an anti-sink coating ( 34 ) on its outer surface ( 32 ), to which coating the spacers ( 4 ) are attached. 
     
     
         8 . Insulation device according to  claim 1 , wherein the spacers ( 4 ) are attached to the rigid insulation layer ( 3 ) with a predetermined span (P) along parallel lines. 
     
     
         9 . Insulation device according to  claim 8 , wherein the spacers are offset by a half-step between two adjacent lines. 
     
     
         10 . Insulation device according to  claim 8 , wherein the spacers ( 4 ) of the same line are connected to one another by small U-shaped beams ( 5 ) that cover said spacers. 
     
     
         11 . Insulation device according to  claim 10 , wherein the cladding plate ( 6 ) is attached to the small U-shaped beams ( 5 ). 
     
     
         12 . Insulation device according to  claim 1 , wherein the cladding plate ( 6 ) is adapted to receive cover accessories ( 17 ) that are adapted to be attached to said cladding plate. 
     
     
         13 . Method for thermal insulation of a building partition ( 1 ) from the outside, according to which:
 A first surface, a so-called contact surface ( 31 ), of a rigid and impermeable insulation layer ( 3 ), is attached to said partition ( 1 ),   Spacers ( 4 ) are attached to a second surface, a so-called outer surface ( 32 ), of the rigid insulation layer ( 3 ) opposite to the contact surface, with a predetermined span (P) along lines that are parallel and orthogonal to a greater pitch line of the partition,   The spacers ( 4 ) of the same line are connected to one another by small U-shaped beams ( 5 ), in such a way that said small beams cover the spacers, and   A rigid and perforated cladding plate ( 6 ) is attached to said small beams ( 5 ) in such a way as to form an air gap ( 7 ) between said cladding plate ( 6 ) and the outer surface ( 32 ) of the rigid insulation layer ( 3 ),   
       wherein before attaching the cladding plate ( 6 ), bags ( 10 ) of granular insulation ( 9 ) in divided form are attached between each line of spacers ( 4 ) to the outer surface ( 32 ) of the rigid insulation layer ( 3 ). 
     
     
         14 . Insulation method according to  claim 13 , wherein the spacers ( 4 ) are offset by a half-step between two adjacent lines. 
     
     
         15 . Insulation method according to  claim 13 , wherein each bag ( 10 ) is placed in such a way that the largest dimension of the cavity or cavities that form(s) it is parallel to the lines of spacers. 
     
     
         16 . Insulation device according to  claim 2 , wherein the granular insulation ( 9 ) is a porous granular insulation. 
     
     
         17 . Insulation device according to  claim 2 , wherein each bag ( 10 ) has an essentially cylindrical shape, with a diameter that is less than or equal to the distance between the outer surface ( 32 ) of the rigid insulation layer ( 3 ) and the cladding plate ( 6 ). 
     
     
         18 . Insulation device according to  claim 2 , wherein each bag ( 10 ) has an essentially parallelepiped shape and comprises partitions, so-called separation partitions ( 11 ) that are rectangular, parallel, and uniformly spaced and whose long edges are attached to the main surfaces ( 14   a ,  14   b ) of each bag so as to keep a distance that is less than or equal to the distance between the outer surface ( 32 ) of the rigid insulation layer ( 3 ) and the cladding plate ( 6 ) between said main surfaces. 
     
     
         19 . Insulation device according to  claim 3 , wherein each bag ( 10 ) has an essentially parallelepiped shape and comprises partitions, so-called separation partitions ( 11 ) that are rectangular, parallel, and uniformly spaced and whose long edges are attached to the main surfaces ( 14   a ,  14   b ) of each bag so as to keep a distance that is less than or equal to the distance between the outer surface ( 32 ) of the rigid insulation layer ( 3 ) and the cladding plate ( 6 ) between said main surfaces. 
     
     
         20 . Insulation method according to  claim 14 , wherein each bag ( 10 ) is placed in such a way that the largest dimension of the cavity or cavities that form(s) it is parallel to the lines of spacers.