| 摘要 |
An assembly 1 of a frame 2 such as a door or window frame is mounted at a cavity wall 3 having an inner and an outer leaf 4 and 5 respectively, of brickwork or blockwork, separated by a cavity 6. There is below the frame 2 a device 7 having a substantially rigid non-combustible insulated cavity closer means 8 of foam, on one face of which is a flexible metal foil or membrane 9 which is on a face of the closer means 8 which extends across and faces into the cavity. |
