Page 38 - Between light and shade

between light and shade, TRANSPARENCy and reflection

and horizontal position 23. It is very easily recy-
clable, being primarily made of just silica and
small stainless steel columns. Its thickness is
virtually that of single glazing and its edge is so
thin that it is able to replace small glazed panes
in the thin wooden frames of all, what are known
as, heritage buildings. Although they are crys-
tal-clear, the discrete presence of small blocks
of stainless steel revives the “presence” of drawn
glass in these panes. However, the size of the
glazing currently produced using this process
is restricted to 1.5 m by 3 m, but larger formats
are expected with glazing that is more than 6
mm thick.

The second event relates to the sharp fall in
the cost of silicon photovoltaic cells (switching
from an edge of 10.4 cm to 15.6 cm (from 4 to 6
inches): from 3.3 USD/PW in 2006 to 0.60 USD/
PW in 2012 and to 0.38 USD/PW in April 2016 24.

and falls to 0.7 for triple glazing. 1997 Spacia glazing has a U
value = 1.4 W/m² °K.
23 This is an additional property, as current double or triple

glazing sees its heat transfer increase significantly as it moves
away from the vertical. For example, the U value of high insu-
lation double glazing changes from 1.1 in a vertical position to
1.7 in a horizontal position, which represents a reduction in
heat resistance of more than 50%.
24 Laurent Quittre, ISSOL, e-mails to Samyn and Partners

2012.05.23/16 :03 and 2016.03.10/16 :27 (this is the US dollar per
Peak Watt (PW), based on the Bloomberg index) and average
prices, for both mono- or poly-crystalline cells.

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