Glass is produced from naturally occurring silica. Making up 20%
of the earth’s surface, silica is a readily available resource.
However, carbon benefits
are incurred from recycling glass, which requires 25 to 32% less
energy than that required to make new glass. In addition, glass
can be recycled over and over, making it a truly sustainable product.
The use of energy efficient glazing has a significant effect on
energy use of a house. Using
passive solar design, the suns energy can be captured.
The choice of glazing in a building will have a significant effect
on energy use within. Passive solar design can be used to capture
the sun’s heat and double glazing is readily available.
Insulated glass is availabe in:
- Double Glazing
- Triple Glazing
- Insulating Inert Glass Fill
- Heat Reflective Film
Prevent Solar Overheating
Heat gains can also be a problem in many homes that have large
glazed areas exposed to the sun. To prevent overheating, and thereby
reducing the use of air cooling there are a number of things that
can be done:
- Fix external fixed or motorised louvres to reduce the suns energy
reaching the surface of the glass.
- Use solar reflective films, reflective glass and tinting to
reduce solar gains
- Electronically tint windows to reduce the light and heat energy
Reducing solar entry into a home reduces the natural light entering
the home as well. This leads to an increased need for artificial
lighting; a significant energy use in buildings.
Recent developments in tinted glass [green tinted glass] provides
all the benefits of the tint, whilst maintaining the good light
Energy Producing Glass
Glass panels with photovoltaic cells embedded can generate electricity.
For example, BIPV - Building Integrated Photovoltaics With ASI®
Glass - glass laminates and double glazed units incorporate ASI®
Glass solar panels able to provide solar electricity, light management,
and thermal management . Insulated Facade Opaque Cladding is commonly
used with commercially available framing systems. See: http://www.schott.com
Noise pollution is increasing rapidly, with boom box stereos. big
pipe cars, inconsiderate neighbors and increasing traffic.
Studies have proven significant stress related conditions due to
the exposure to constant noise. Add to that any sleep deprivations,
and the impact of noise on the body can be signficant; leading to
both physical and mental disorders.
Noise insulating glass products are avaialble to act as noise barriers.
PLEXIGLAS SOUNDSTOP® - reflects sound waves at the SOUNDSTOP®
barrier, considerably reducing the noise level beyond the barrier.
Available in both clear and colored versions. See: http://www.degussa.com
STRATOFONE - Acoustic laminated safety - security glass has one
or more interlayers of clear PVB. At least one of these interlayers
is acoustic PVB. Combined with other glasses to support: solar control,
low emissivity, and decoration. See: http://www.glaverbel.com
PILKINGTON HUSH GLASS - Cast in Place [CIP] Laminated Glass is
designed to reduce noise by using two sheets of glass bonded together
with a specially formulated noise reducing resin interlayer. Hush
Glass claims to outperform thicker glass, double- glazing and Laminated
glass, with the added benefit of being a Grade A Safety Glass. See:
Low Emmission Solar Insulation Glass
Low-emissivity coatings allow solar energy transmission through
the window to heat the interior of a building, but reflect outgoing
heat back into the room. Examples include:
Pilkington Energy Advantage Low E Glass - is a
clear glass with a transparent low-emissivity coating applied to
one surface. Low-E can be processed into toughened or laminated
safety glass. When combined in an IGU with Pilkington ComforTone™
glass it can reduce solar heat in summer and heat loss in winter.
Pilkington EverGreen™ - low shading, soft
green colored, high light transmission glass providing greater solar
control without the use of a surface coating. Available in sheets
Pilkington Optilam™ - two or more sheets
of glass bonded together by heat and pressure with one or more sheets
of PVB interlayer. Performance depends upong the number, thickness
and type of each glass and PVB interlayers. This product is used
to provide safety, security, bullet resistance, cyclone and explosion
resistance, solar control and UV protection, noise control, privacy
and decoration. Standard PVB interlayer thicknesses are 0.38, 0.76
DMS Glass Envirolam - Laminated glass with a PVB
Plastic interlayer blocks out 99% of UV rays as well as preventing
the glass from disintegrating when broken. See: http://www.dmsglass.com.au
Next: Green Roofs
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