Double-glazing system for old and traditional window frames has one pane of greater dimensions than the other for bedding into frame recess

摘要

The double-glazing system consists of two sealed panes of glass (1, 2) with a gap (3) between that depends on the depth of the window frame. The outer pane (1) is 7 - 8 mm larger than the inner one in each direction, allowing it to be bedded into an existing frame recess and held in place by nails (4) and a mastic seal (5) or a sealing extrusion.