| 摘要 |
<p>An external windowsill extension (5) formed as an extrusion, typically of uPVC, in which the extrusion (5) has a length and a consistent cross section along the length, the cross section comprising an elongate arm (6) terminating in a hollow sill portion (7), the hollow sill portion (7) providing a sill edge (8) to be positioned distal from an original sill (3); and in which the cross section of the extrusion comprises a key (13) for a render coating (23), extending away from the hollow portion (7) from an edge furthest from the sill edge (8). A related coping system, which can use the same extrusion, for capping the top of a wall having an external face that is having insulation applied thereto is also disclosed, the coping system comprising a support (200) and a pair of extrusions (199), each extrusion having a length and a consistent cross section along the length, the cross section comprising an elongate arm (206) terminating in a hollow portion (207) and a distal end distal from the hollow portion (207), the support (200) being provided with a pair of sockets (205), each socket (205) receiving the distal end of one extrusion (199). A method of manufacture of the extrusions is also disclosed, comprising: using a die to form lengths of extrusion having a profile, the extrusion being of a plastic material heated to a temperature where it is malleable; bending at least some of the lengths whilst the extrusion is still sufficiently hot to be flexible; and allowing the extrusions to cool so as to no longer be malleable; the method comprising generating a plurality of sets of cooled extrusions using the same die, the sets differing in the bends that have been applied to the extrusion.</p> |
