Flashing member and a method for making a flashing member

Abstract

A flashing member (30, 32, 33) for a roof window (1) and a method for making a flashing member is disclosed. The flashing member is made from a sheet material and comprises an elongate main element (301) and at least one end element (302), attached to the main element (301) at one end by a folded seam connection (303). The main element (301) comprises a first section (3011) extending along a length axis (L) and a height axis (H) of the flashing member, and a second section (3012) extending along the length axis and a width axis (W). The main element (301) is made from an aluminium alloy having elongation at break of at least 6% and the end element (302) is made from an aluminium alloy having an elongation at break of at least 12%.

1 . A flashing member for a roof window comprising a frame, said frame comprising a plurality of frame members including a top frame member, a bottom frame member, and two side frame members, said plurality of frame members delimiting a frame opening and each of said plurality of frame members having an outer side facing away from the frame opening,
 where said flashing member is formed from a sheet material,   where said flashing member comprises an elongate main element having two ends and at least one end element,   where the elongate main element comprises a first section extending along a length axis and a height axis of the flashing member, and a second section extending along the length axis and a width axis of the flashing member, said length axis extending between the two ends of the elongate main element, and   where the at least one end element is attached to the main element at one end and connected to the first section and the second section by a folded seam connection,   the elongate main element is formed from an aluminium alloy having an elongation at break of at least 6% and that the at least one end element is formed from an aluminium alloy having an elongation at break of at least 12% and larger than the elongation at break of the elongate main element.   
     
     
         2 . The flashing member according to  claim 1 , where the elongate main element is formed from an aluminium alloy having an elongation at break of 6-24% and that the at least one end element is formed from an aluminium alloy having an elongation at break of 12-32%. 
     
     
         3 . The flashing member according to  claim 1 , where the elongate main element is formed from an aluminium alloy having an elongation at break of at least 15% and that the at least one end element is formed from an aluminium alloy having an elongation at break of at least 30%. 
     
     
         4 . The flashing member according to  claim 1 , where the folded seam connection is a flat lock seam. 
     
     
         5 . The flashing member according to  claim 4 , where each of the at least one end element and the elongate main element comprises a bent edge, where said bent edges hook into each other, and where the flat lock seam has been compressed so that the bent edges are pressed firmly against each other. 
     
     
         6 . The flashing member according to  claim 1 , where height axis and the width axis are substantially perpendicular to each other, and the first section and the second section extend in directions that are substantially perpendicular to each other. 
     
     
         7 . The flashing member according to  claim 1 , where the elongate main element further comprises a planar third section extending between the first section and the second section, said planar third section extending along the length axis and at an angle to both the first section and the second section. 
     
     
         8 . The flashing member according to  claim 7 , where the planar third section extends at angles of at least 110 degrees, with respect to the first section and the second section. 
     
     
         9 . The flashing member according to  claim 7 , further comprising at least one of:
 a fourth section extending from an edge of the first section opposite the planar third section, said fourth section being configured for engaging with an exterior side of a frame member in the mounted state,   a fifth section extending from an edge of the fourth section opposite the first section, such that the first section, the fourth section and the fifth section form a right-angled U-shape,   a reinforcement element configured for being mounted at an interior side of the first section,   a sixth section extending from an edge of the second section opposite the planar third section, and   a skirt element attached to the sixth section or the second section.   
     
     
         10 . The flashing member according to  claim 1 , where the flashing member is configured for use as a bottom flashing member mounted at the bottom frame member of the roof window mounted in an inclined roof. 
     
     
         11 . The flashing member according to  claim 10 , where a skirt element extends in continuation of the second section. 
     
     
         12 . The flashing member according to  claim 1 , where the sheet material is sheet metal. 
     
     
         13 . The flashing member according to  claim 1 , where a total height of the elongate main element along the height axis is 25-60 mm. 
     
     
         14 . A roof window mounted in an inclined roof structure, where a flashing member according to  claim 1  is mounted at the bottom frame member of the roof window, below the roof window when seen in a direction of inclination of the inclined roof structure. 
     
     
         15 . A method for making a flashing member for a roof window comprising a frame, said frame comprising a plurality of frame members including a top frame member, a bottom frame member, and two side frame members, and said plurality of frame members delimiting a frame opening, each of said plurality of frame members having an outer side facing away from the frame opening, said method comprising the steps of:
 A) providing a first piece of sheet material and a second piece of sheet material,   B) forming an elongate main element having two ends from the first piece of sheet material, such that the elongate main element comprises a first section extending along a length axis and a height axis of the flashing member, and a second section extending along the length axis and a width axis of the flashing member, said length axis extending between the two ends of the elongate main element,   C) forming an end element from the second piece of sheet material,   D) attaching the end element to the elongate main element at one end of the elongate main element by a folded seam connection, thereby connecting the end element to the first section and the second section,   the elongate main element is formed from an aluminium alloy having an elongation at break of at least 6% and that the end element is formed from an aluminium alloy having an elongation at break of at least 12%.   
     
     
         16 . The method according to  claim 15 , where step D) comprises the steps of:
 D 1 ) folding an edge flange of the second piece of sheet material into a hook shape and engaging said edge flange of the second piece of sheet material with an edge flange of the first piece of sheet material, and   D 2 ) folding said edge flanges onto the first piece of sheet material thereby forming the folded seam connection.   
     
     
         17 . The method according to  claim 16 , where step D) comprises the step of:
 D 3 ) compressing the folded seam connection into a flat lock seam by pressing in a direction perpendicular to the length axis.   
     
     
         18 . The method according to  claim 15 , where step B) comprises forming a planar third section extending between the first section and the second section by bending the first piece of sheet material twice along two parallel lines, so that said planar third section extends along the length axis and at an angle to both the first section and the second section. 
     
     
         19 . The method according to  claim 18 , further comprising one or more of the steps of:
 E) forming a fourth section extending from an edge of the first section opposite the planar third section by bending the first piece of sheet material,   F) forming a fifth section extending from an edge of the fourth section opposite the first section by bending the first piece of sheet material, such that the first section, the fourth section and the fifth section form a right-angled U-shape,   G) attaching a reinforcement element at an interior side of the first section,   H) forming a sixth section extending from an edge of the second section opposite the planar third section by bending the first piece of sheet material,   I) attaching a skirt element to the sixth section.   
     
     
         20 . The flashing member according to  claim 7 , where the planar third section extends at angles of at least 120 degrees, with respect to the first section and the second section.