| 摘要 |
<p>A building element (310) is intended for sealing a hole of a foil of an underroof of a roof structure in which hole a rectangular support structure for a window frame structure having a specific configuration and specific dimensions is mounted. Through the hole access is established from the surroundings into the interior space defined below the roof structure. The building element comprises a rim part (322) defining a central rectangular aperture of a configuration and a perimeter substantially corresponding to the configuration and perimeter of the hole, and a collar part (324) integrally connected to and extending substantially perpendicular from the rim part and circumferentially encircling the mentioned central rectangular aperture. The rim part (322) and the collar part (324) of the building element are made from weather-proof materials, and the rim part (322) is adapted to be arranged in substantially co-planar relationship relative to and in facial contact with the foil of the underroof so as to arrange the central aperture (323) of the rim part in registration with the hole of the foil of the underroof and so as to arrange the collar part (324) extending upwardly from the rim part (323). The building element (310) is made from reversible water vapour transmitting plastic foils comprising a water and water vapour resistant, water impermeable and water vapour permeable barrier layer. <IMAGE> <IMAGE></p> |
