| 摘要 |
<p>A building element (210) for sealing a hole of a foil (96) of an underroof of a roof structure through which hole access is established from the surroundings into the interior space defined below the roof structure, comprises a rim part (216) defining a central aperture of a configuration and a perimeter substantially corresponding to the configuration and perimeter of the hole, and a collar part (218) integrally connected to and extending substantially perpendicularly from the rim part and circumferentially encircling the aperture. The rim part (216) and the collar part (218) are made from weather-proof materials and the rim part (216) 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 of the rim part (322) in registration with the hole of the foil of the underroof and so as to arrange the collar part (218) extending upwardly from the rim part (216). The building element (210) further comprises a collar element (214) to be fixated within the collar part (218) for sandwiching the foil (96) of the underroof between the collar part (218) and the collar element (214). The rim part (322), the collar part (324) and the collar element (314) are preferably integrally cast from weather-proof plastic materials, e.g. high-density polyethylene, low-density polyethylene, polyvinyl chloride, polypropylene or the like, or alternatively made from corrosion-resistant metal, such as aluminium, or combinations thereof. <IMAGE></p> |
