Standard glass has a relatively low R-value, meaning it offers little resistance to the flow of thermal energy between the interior and exterior environments. By addressing one of the weakest points in a building envelope, the film helps maintain consistent indoor temperatures and reduces seasonal energy waste.
Permanent vs Temporary Window Insulation Film: Choosing the Right Type for Your Home
Types of Film and Application Methods Consumers can choose between two primary types of window insulation film: shrink film and magnetic film. This layer slows down the rate at which heat escapes during the winter and reduces heat gain during the summer.
The Role of Trapped Air Air is a poor conductor of heat, and the pocket of air trapped between the window glass and the film acts as an insulative layer. Shrink film requires precise cutting and heating to achieve a tight finish, while magnetic film attaches to the window frame using magnetic strips, allowing for seasonal removal and reapplication.
Permanent vs Temporary Window Insulation Film: How They Isolate Glass and Trap Air
Considerations for Optimal Performance For maximum effectiveness, the film must cover the entire glass surface without significant overlap that could catch air and pull away from the seal. Both types function by isolating the glass from direct exposure to external temperatures.
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