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Secondary glazing is much cheaper than full double-glazing and
is the option to go for if you do not need to replace your current
single glazed windows.
There are different types of secondary glazing and these vary in
price and effectiveness.
Plastic film is the cheapest and easiest method but it is only
intended for one season's insulation.
1. Apply double-sided tape to the fixed frame and peel off the
release paper.
2. Stretch the film across the top, then the sides and bottom, and
shrink it in place with a hairdryer.
3. Trim the excess film.
Other types of secondary glazing have sophisticated
frames to hold the glazing, allowing it to be either slid open or
removed altogether for cleaning and ventilation. These all come
in kit form with instructions for installation.
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Check that the type
you choose can be removed quickly in the event of a fire.
To avoid condensation
on the outer pane, only the secondary glazing (not the original
frame) should be draught proofed.
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