.::. Some Random Terms .::. • Flashings Sheet metal used to weatherproof the joints at the roof, at the tops of doors and windows, and at other horizontal joints in vertical surfaces in order to prevent water penetration. .... • Architrack an architectural track made by kirsch® .... • Oriel window A single hung or double hung window where the upper sash (or IG unit) is taller than the lower sash. Usually a 60/40 or one third two thirds ratio. ....