(57) The invention concerns a comer joint for a prefabricated window bordering of the
kind which is composed of two vertical side panel boards (2), a horizontal superjacent
panel board and a number of architraves (4) associated with the panel boards (3),
and where the panel boards (3) are intended for customary letting in into grooves
(8) provided therefor in the window frame (1).
Two comer joints between the superjacent panel board (3) and the two side panel boards
(2) are each composed of two extruded plastic or metal edge profiles (13,14), where
one edge profile (13) is fastened to the end face of the side panel board (2) in question,
and the other edge profile (14) is fastened to the corresponding end face on the superjacent
panel board (3). Furthermore, one edge profile (13) is provided with a groove (17)
and the other edge profile (14) is provided with a projecting profiled rib (21) corresponding
to this groove (17), the rib (21) adapted to by insertion into the groove (17) to
lock the two edge profiles (13,14) together, e.g. by squeeze action or by a snap lock
action.
The comer-profile assembly is suitably equipped with an integrated sealing system
(20) consisting of a suitable elastomeric sealing material, which in highly viscous
paste-like condition is laid into the profile groove (17,19). Alternatively, the sealing
consists of an actual sealing strip inserted between the edge profiles (13,14). Panel
boards (2,3) as well as architraves (4) are covered by plastic laminate. In that way,
the window bordering immediately attains the degree of tightness required by the building
regulations without additional measures. The plastic laminate covering simultaneously
constitutes the vapour barrier or the moisture membrane in the building construction
in and around the window niche.
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