DOORS&WINDOWS
SECONDARY GLAZING,
GOING THE DURATION
Since 1985, Essex based Duration
Windows have manufactured a high
performance yet cost effective and
easy to fit, secondary glazing system.
WHAT IS SECONDARY
GLAZING?
Secondary glazing is a simple
way to reduce noise and draughts
and cut heating bills. It is perfect
for listed buildings and rented
accommodation where altering
or replacing the prime window
is not possible. Secondary
glazing involves adding an extra
slim-line window in addition to
your existing windows. Available
in many styles and 200+ RAL
colours to match existing
windows, it will blend in with
your property, curtains and blinds
remaining unaffected most of the
time.
WHY ALUMINIUM?
Aluminium is durable, will not
rot, allowing for naturally strong
and very discreet slim frames. We
offer a range of made to measure
systems, from simple lift out and
fixed units through to horizontal
and vertical sliders, aluminium
can even be curved to form
arched units.
DELIVERY
Our standard lead time is 2-3
weeks, but if your requirement
is urgent we also offer a Fast
Track service. Delivery is by our
own GPS tracked vans and we
cover most of the UK. Sliding
panels come made up and fully
glazed and the majority of the
time they can be delivered fully
assembled within the frame ready
for installation. Your outerframe
may be supplied in kit form if site
access is a problem or the units
are particularly large.
EASY
INSTALLATION
Due to the
uncomplicated nature
of Duration Secondary Glazing it
is remarkably straightforward to
assemble and install. Fixed from
the inside, secondary can be fitted
throughout the year providing
income whatever the weather. By
simply fixing pre drilled units to
the existing windows or into the
window reveal, you can be sure of
a mess free easy installation.
Cover trims are included and
come in a range of sizes and
finishes including white plastic,
tulip, and solid oak. To save
time some trims are available
pre-primed. They are provided to
hide fixing screws and ensure a
professional clean finish.
BENEFITS OF
SECONDARY GLAZING
Adding well fitted secondary
glazing with standard 4mm glass
will give significant benefits
in energy saving and reducing
heating bills. Duration offer a
range of glazing options including
Float, Toughened & Laminated.
For the best sound reduction, we
offer 6.8mm Acoustic or 6.4mm
Laminated.
Slim lines and high
specification make our Secondary
Glazing the goto solution for
listed buildings. Considered to
be a reversible change, secondary
glazing is recommended by
English Heritage and the Listed
Property Owners Club.
Having a 100mm - 200mm
air gap between the secondary
glazing and the existing windows
(glass to glass) will provide an
optimum gap for sound and heat
performance. The air gap provides
an additional barrier, preventing
heat and sound from passing
through. We have a deeper SF3
and SF4 subframe’s specifically for
the purpose of ‘reveal’ fixing the
secondary glazing to give this gap.
If only a smaller gap can be used
then secondary glazing is still very
effective.
If you’re uncertain about
the look and feel of secondary,
Duration provide free survey
sample kits. Each kit contains off
cuts from our secondary systems,
including extensions, wooden
frames and trims and are available
through our Sales team.
CHOOSING GLASS
THICKNESS
When installing secondary
glazing for sound proofing
we recommend that you use a
different thickness of glass in your
secondary glazing than that of the
glass in your existing windows.
Different thicknesses of glass
will help to block different wave
lengths of sound. For maximum
sound reduction we offer acoustic
glass which is 6.8mm thick. Our
6.4mm ‘laminated’ glass offers a
significant noise benefit over other
glass options, but at a reduced
cost compared to acoustic glass.
Double glazed units are available
on our Heavy Duty Horizontal
and Vertical Sliders and these also
benefit from larger maximum
panel sizes.
FREE SURVEY KIT AND
GETTING PRICES
Preferred by our customers,
the fastest way to get a price is by
using our online estimator (www.
duration.co.uk). It’s quick and
easy to use and you’ll get a price
in minutes. Alternatively send us
details of what you want us to
quote by email or fax. Please also
contact us for your free survey kit
by emailing [email protected].
28 » SEP 2020 » CLEARVIEW-UK.COM