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Secondary glazing is the process of adding components to an existing single glazed window or door in order to make it effectively double glazed. This is usually done to improve the thermal performance of the glazing or to reduce the noise transmission of the glazing or both.
(If you have sunlight directly hitting the glass in your home, then secondary glazing may not be the most effective system for reducing your heat gain. Contact us for effective shading solutions to effectively block the radiant heat.)
How is it done?
There are several common methods of secondary glazing. Usually an acrylic panel (like Perspex) is encapsulated in a plastic frame and attached to the inside of the window unit or a frame added to the window reveal using some kind of magnetic system. The use of magnets enables the panel to be removable. There is also a method using heat shrink cellophane attached using double sided tape. This method cannot be removed for cleaning without destroying the components.
Why Secondary Glaze?
Secondary glazing has the advantages of being more cost effective than replacement double glazing while providing similar performance. The disruption of construction work is also avoided.
How does it work?
The second panel creates a still air space between itself and the existing window. This significantly reduces the transfer of heat from outside to inside.
How much money could it save me?
Every home is different and some homes have much greater areas of glazing than others. On average you may anticipate a saving of arund 30% off your heating and cooling bill. If coupled with other kinds of thermal insulating systems, such as draught proofing and insulation, this saving could be increased to around 50% of your heating and cooling bill.
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