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Plain glass is used for many purposes but three major uses are
for window glass, picture glass and greenhouse glass. Each is different
in specification and thickness dependant upon its use.
Picture Glass
Normally 2mm plain glass is used, but to avoid unwanted reflections
in difficult lighting conditions, diffused finished glass may be
used instead.
Window Glass
Can be 3mm, 4mm or 6mm panes. Toughened Glass should be used whenever
there is a danger of persons walking into or falling through the
window, such as on single pane patio doors and French windows, and
also on any large window mounted above the ground floor.
Greenhouse Glass
Will normally be 2mm for lightness, with the the exception of of
moving windows and doors which should be 3mm.
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