Window case assembly and method for mounting same in window opening of building

摘要

A window case includes a main frame formed of a pair of vertical sections and a pair of horizontal sections. Each section has an outwardly open U-shaped channel extending longitudinally along the section, each channel having a front sidewall, an inner bottom wall and a rear sidewall opposite the front sidewall. A limb extends longitudinally along each of the sections and frontwards from an outer edge portion of the front sidewall thereof. The limbs of each of the vertical sections and the horizontal sections together define an intermediate window frame. A pane frame securing a window pane is mounted on the intermediate window frame.