Win­dow in­su­la­tion kits

Avail­able from: hard­ware stores, on­line In­stal­la­tion: DIY

NZ Lifestyle Block - - FEATURE -

These use a heat-shrink­able, thin plas­tic film which is at­tached to the win­dow sash or frame us­ing dou­ble-sided ad­he­sive tape. It costs a frac­tion of the price of dou­ble glaz­ing, yet still of­fers good per­for­mance in re­duc­ing heat loss and con­den­sa­tion in your home.

But there are draw­backs: it re­duces the clar­ity of the glass, so is no good if you want to main­tain a crys­tal clear view, and it’s only de­signed to last one sea­son, although it may re­main in­tact for sev­eral years if your win­dows are in good con­di­tion and the film is undis­turbed. How­ever, ad­he­sive tape used on the film may leave a stain on the glass if you leave it on for longer than one sea­son.

Win­dow in­su­la­tion film works on the same prin­ci­ple as stan­dard dou­ble glaz­ing by cre­at­ing a layer of still air in front of the glass that acts as in­su­la­tion, but you at­tach it to the win­dow sash or wooden win­dow frames, and not di­rectly onto the glass pane it­self.

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