| 摘要 |
A sealed foil (3) is placed between the insulation layer (4) and the plate (2), and the screw has a self-boring point (10) to which is connected a shaft part with a thread (11). A coating of glue is applied to the screw threaded part. - The glue melts or softens under the effect of friction heat when the scew point turns on the supporting structure (2), and flows downwards as the screw is tightened to seal the gap between the screw and the edges of the penetration hole through the foil and outer roof structure. |
