Insulation system for covering a facade of a building

Abstract

This invention relates to an improved insulation system for covering a facade of a building consisting of at least one insulation element, at least one mechanical fastener, which fastener fixes the insulation element to the facade of the building, whereby the insulation element has at least a first and a second layer, the first layer being directed to the facade having a bulk density being lower than the bulk density of the second layer, whereby at least one layer is made of mineral fibers, especially stone wool fibers and a binding agent and whereby the fastener has a shaft erecting through the insulation element into the building and a plug-plate being arranged on or in the outer surface of the insulation element. To achieve an insulation system which has very good insulation characteristics, which can be produced for low costs and which can be fixed to the facade of a building without causing high labor costs the shaft if the fastener partly erects into the first layer of the insulation element in a direction parallel to the surface of the facade.

1 . An insulation system for covering a facade of a building consisting of at least one insulation element and at least one mechanical fastener, which fastener fixes the insulation element to the facade of the building, whereby
 said insulation element has at least a first and a second layer, preferably being connected to each other;   said first layer being directed to the facade having a bulk density being lower than the bulk density of the second layer;   at least one layer is made of mineral fibers, especially stone wool fibers and a binding agent, or of cellular plastic, especially expanded polystyrene (EPS),   said fastener has a shaft erecting through the insulation element into the building and a plug or a plug-plate being arranged on or flush with the outer surface of the insulation element,   characterized in that   said shaft of the fastener partly erects into the first layer of the insulation element in a direction parallel to a surface of the facade.   
     
     
         2 . The insulation system according to  claim 1 , characterized in that a screw is provided in the shaft of the fastener with which a first part of the shaft erecting into the building is bucked up and with which a second part of the outer surface of the fastener is oriented from parallel to the outer surface of the fastener to mainly perpendicular to the outer surface thereby protruding into the first layer of the insulation element. 
     
     
         3 . The insulation system according to  claim 2 , characterized in that the second part of the shaft has at least two areas protruding into the insulation element whereby the areas protrude in at least two different directions, preferably perpendicular to each other into the insulation element. 
     
     
         4 . The insulation system according to  claim 1 ,
 characterized in that a third layer is being arranged on the second layer and which third layer has a bulk density of 180 kg/m 3  to 350 kg/m 3 , preferably of 220 kg/m 3  to 260 kg/m′, especially of 240 kg/m 3 .   
     
     
         5 . The insulation system according to  claim 1 , characterized in that the element as such is defined by a compressive stress at 10% strain to secure that a certain spring-back effect can be utilized during installation. 
     
     
         6 . The insulation system according to  claim 1 , characterized in that the first layer has a compressive strength of 5 kPa to 15 kPa, preferably of 5 kPa to 10 kPa and/or in that a preload on the fastener is in a range of between 100 N to 600 N per fastener. 
     
     
         7 . The insulation system according to  claim 1 , wherein the first layer of the insulation element has a bulk density of from 30 kg/m 3  to 70 kg/m 3 , preferably 40 kg/m 3  to 60 kg/m 3 , especially of 50 kg/m 3 . 
     
     
         8 . The insulation system according to  claim 1 , wherein the second layer ( 9 ) of the insulation element has a bulk density as from 40 kg/m 3  to 120 kg/m 3 , preferably 60 kg/m 3  to 90 kg/m 3 , especially of 80 kg/m 3 . 
     
     
         9 . The insulation system according to  claim 1 , wherein the plug and/or a plug-plate of the mechanical fastener is arranged in the third layer of the insulation element in that the plug and/or plug-plate is flush with the outer surface of the third layer of the insulation element. 
     
     
         10 . The insulation system according to  claim 1 , wherein the insulation element is fixed to the facade by at least one mechanical fastener per square meter of the insulation element. 
     
     
         11 . The insulation system according to  claim 1 , whereby the second layer has fibers being substantially oriented parallel to the surfaces of the second layer. 
     
     
         12 . The insulation system according to  claim 1 , whereby the second part of the shaft for each area protruding into the insulation element has a length of approximately 5 to 40 mm, preferably 25 to 30 mm. 
     
     
         13 . A method for installing an insulation system for covering a facade of a building according to  claim 1  with the following steps:
 fixing at least one insulation element having at least a first and a second layer, preferably being connected to each other, whereby the first layer being directed to the facade has a bulk density being lower than the bulk density of the second layer and whereby at least one layer is made of mineral fibers, especially stone wool fibers and a binding agent, 
 using at least one mechanical fastener to fix the insulation element to the facade of the building, whereby the fastener has a shaft erecting through the insulation element into the building substrate and a plug and/or a plug-plate being arranged on or flush with the outer surface of the insulation element, 
 fixing the fastener in the building by increasing the outer diameter of the shaft protruding into the building substrate and 
 erecting a part of the shaft of the fastener into the first layer of the insulation element in a direction parallel to a surface of the facade. 
 
     
     
         14 . The method according to  claim 13 , whereby the fastener with a first part of the shaft erecting into the building substrate is bucked up by a screw provided in the shaft with which a second part of the outer surface of the fastener is moved from an orientation parallel to the outer surface of the fastener to an orientation mainly perpendicular to the outer surface thereby protruding into the first layer of the insulation element. 
     
     
         15 . The method according to  claim 13 , whereby at least two areas of the second part of the shaft are protruding into the insulation element in at least two different directions, preferably perpendicular to each other. 
     
     
         16 . A fastener for an insulation system for covering a facade of a building according to  claim 1 , with a shaft having a length being longer than the thickness of the insulation element and a plug and/or a plug-plate being arranged on one end of the shaft, characterized in that the shaft is divided into at least a first part and a second part, which second part having a diameter is provided with means which erect outwardly of the diameter by decreasing the length of the shaft via an internal pulling element. 
     
     
         17 . The fastener according to  claim 16 , whereby the internal pulling element is a screw being arranged in the shaft and being connected to the first part of the shaft which is used to fix the shaft in a hole of a building facade. 
     
     
         18 . The fastener according to  claim 16 , whereby the means erecting outwardly are parts of the shaft which is interrupted by two slits being arranged on radially opposite sides of the shaft, whereby each slit has an area of increased width, preferably in circular shape. 
     
     
         19 . The fastener according to  claim 16 , whereby the second part of the shaft has at least two areas being erectable outwardly in at least two different directions of the shaft, preferably perpendicular to each other, by decreasing the length of the shaft via an internal pulling element.