Patent ID: 8789323

Claim:
A method for attachment of an object to a thin-walled fibre glass reinforced profile made by pultrusion with a number of walls, where the profile is a sash of a window, the method including the steps of: attaching the object to the profile using one or more threaded fastening members, the thread of the/each fastening member having an minor diameter and a major diameter, where the/each fastening member is driven into an open-ended space between two walls of the profile, said open-ended space having an opening facing an outer surface of the profile for receiving the/each fastening member, where the opening has a width corresponding substantially to the minor diameter of the thread; and, applying a retaining member to prevent the two walls from moving away from each other after the/each fastening member is driven into the open-ended space, and wherein at least one of the two walls delimiting the open-ended space is provided with a weakening zone at a distance from the opening allowing the wall to bend when the fastening member is driven into the open-ended space, the open-ended space includes a distal end opposite said opening, a first section of said open-ended space adjacent said opening has a first width, a second section adjacent said distal end has a second width, said second width is greater than said first width thereby forming the weakening zone.