Replacement Window Glass
Layers of Glass and Air Spaces
Single-pane. This has very little insulating value
with (approximately r-1). It provides only a thin barrier
to the outside and can account for considerable heat loss
and gain.
Double-pane. To improve a window's energy efficiency
the number of glass panes in the unit is doubled, because
multiple layers of glass increase the window's ability to
resist heat flow.
Types of Glass
There are various types of glass manufacturers use in constructing
windows.
Clear glass has been the primary material available
for window panes in homes. However, in recent years, the market
for glazing--or cutting and fitting window panes into frames--has
changed significantly. Now several types of special glazing's
are available that can help control heat loss and condensation.
Low_emissivity (low-e) glass. This has a special surface
coating to reduce heat transfer back through the window. These
coatings reflect from 40% to 70% of the heat that is normally
transmitted through clear glass, while allowing the full amount
of light to pass through.
Heat-absorbing glass. This contains special tints
that allow it to absorb as much as 45% of the incoming solar
energy, reducing heat gain. Some of the absorbed heat, however,
passes through the window by conduction and re-radiation.
Reflective glass. This has been coated with a reflective
film and is useful in controlling solar heat gain during the
summer. It also reduces the passage of light all year long,
and, like heat-absorbing glass, it reduces solar transmittance.
How can I find out more information?
You can start by Requesting a Free Insider's Guide and
Free No Obligation Quote. When
you request your free replacement windows quote you will
receive the Free Insider’s
Guide to Replacement Windows. Giving you the chance
to learn even more about your options and speak with a licensed
local home improvement professional in your area.
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